65 pubblicazioni classificate nel seguente modo:

A size-dependent imperfect interface model for adhesively bonded joints considering strain gradient elasticity
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Autore/i: Serpilli, M.; Rizzoni, R.; Lebon, F.; Raffa, M. L.; Rodriguez-Ramos, R.
Classificazione: 1 Contributo su Rivista
Abstract: As the size of a layered assembly is reduced, the adhesive layer thickness correspondingly decreases from macro to micro scale. The influence of micro-scale adhesive layers becomes more pronounced, significantly changing the overall performance of the composite structure. This work proposes an original imperfect interface model simulating the behavior of a thin strain gradient elastic adhesive, embedded between two strain gradient elastic bodies, through the asymptotic methods. The intermediate layer is assumed to be mechanically compliant. The contact laws, expressed in terms of the jumps and means values of the displacements, normal derivatives of the displacements, stresses, and double-stresses, represent a formal generalization of the soft elastic interface conditions. Two simple benchmark equilibrium problems (a three-layer composite micro-bar subjected to an axial load and a torsional moment) are developed to analytically/numerically assess the asymptotic model. Size effects and non-local phenomena, due to high strain concentrations at the edges, are highlighted. The example proves the efficiency of the proposed approach in designing micro-scale layered devices.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/327740

Mechanical Performance of Reinforced Pultruded Columns for Curtain Walls
Proceedings of the International Conference of Steel and Composite for Engineering Structures
Autore/i: Agliata, Rosa; Serpilli, Michele; Munafò, Placido
Classificazione: 2 Contributo in Volume
Abstract: The present work is aimed at evaluating the mechanical performance of pultruded beams subjected to bending stresses through experimental tests. Such beams are intended to be used in a curtain wall construction system as a variant to a patent application (n.102020000025636) which includes wood columns. This variant wants to meet the need of smaller dimensions of the columns and keep guaranteeing the mechanical performance. The columns are made of pultruded I-beams, reinforced with glued metal plates and two prestressed threaded bars placed in the central axis of symmetry of the section. First, the materials (pultruded, steel plates, threaded bars and structural glue) are mechanically characterized; then, three types of columns are tested by means of a 3-point bending test and 3 loading/unloading cycles: (i) n. 1 beam with no reinforcement plates or pretension bars, (ii) no. 2 beams with reinforcement plates and no pretension bars, (iii) no. 2 beams with reinforcement plates and pretension bars. The maximum deformation in the elastic range for all reinforced beams (11.48 mm) is measured by applying a load of approximately 10 kN, corresponding to a wind pressure of more than double the requirement for windows (2000 Pa). The contribution of the threaded bars to the maximum applicable load is negligeable, which can be ascribed to their placement in the middle of the section. This first solution is chosen because of the small dimensions of the GFRP profile section.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/312147

A Micromechanical Model for Damage Evolution in Thin Piezoelectric Films
COATINGS
Autore/i: Rizzoni, Raffaella; Serpilli, Michele; Raffa, Maria Letizia; Lebon, Frédéric
Classificazione: 1 Contributo su Rivista
Abstract: Thin-film piezoelectric materials are advantageous in microelectromechanical systems (MEMS), due to large motion generation, high available energy and low power requirements. In this kind of application, thin piezoelectric films are subject to mechanical and electric cyclic loading, during which damage can accumulate and eventually lead to fracture. In the present study, continuum damage mechanics and asymptotic theory are adopted to model damage evolution in piezoelectric thin films. Our purpose is to develop a new interface model for thin piezoelectric films accounting for micro-cracking damage of the material. The methods used are matched asymptotic expansions, to develop an interface law, and the classic thermodynamic framework of continuum damage mechanics combined with Kachanov and Sevostianov’s theory of homogenization of micro-cracked media, to characterize the damaging behavior of the interface. The main finding of the paper is a soft imperfect interface model able to simulate the elastic and piezoelectric behavior of thin piezoelectric film in the presence of micro-cracking and damage evolution. The obtained interface model is expected to be a useful tool for damage evaluation in MEMS applications. As an example, an electromechanically active stack incorporating a damaging piezoelectric layer is studied. The numerical results indicate a non-linear evolution of the macroscopic response and a damage accumulation qualitatively consistent with experimental observations.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/309621

Effective Engineering Constants for Micropolar Composites with Imperfect Contact Conditions
Advanced Structured Materials
Autore/i: Rodriguez-Ramos, R.; Yanes, V.; Espinosa-Almeyda, Y.; Sanchez-Valdes, C. F.; Otero, J. A.; Lebon, F.; Rizzoni, R.; Serpilli, M.; Dumont, S.; Sabina, F. J.
Editore: Springer Science and Business Media Deutschland GmbH
Classificazione: 2 Contributo in Volume
Abstract: In this work, the homogenization theory is applied within the framework of three-dimensional linear micropolar media. The fundamental results derived by the asymptotic homogenization method to compute the effective engineering moduli for a laminated micropolar elastic composite with centro-symmetric constituents are summarized, in which the interface between the layer phases is considered imperfect spring type. The layers are considered with isotropic symmetry. Non-uniform and, as a particular case, uniform imperfections are assumed, where different imperfection parameters and cell lengths in the y3 -direction are assigned for the analysis. The analytical expressions of the engineering constants related to the stiffness and torque are given as functions of the imperfection parameters. The behavior of the engineering coefficients depending on the imperfection is studied. The influence of the imperfection and the cell length in the direction of the imperfection is observed. The present study allows validating other models and experimental results, as well as the investigation of fracture prediction in laminated composite materials.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/327739

A novel form of imperfect contact laws in flexoelectricity
COMPOSITE STRUCTURES
Autore/i: Serpilli, M.; Rizzoni, R.; Rodriguez-Ramos, R.; Lebon, F.; Dumont, S.
Classificazione: 1 Contributo su Rivista
Abstract: Flexoelectric materials exhibit coupling between electric polarization and mechanical strain gradient. At the nano-scale and micro-scale, these materials offer a promising potential for the development of mechanical transducers and energy harvesters. This work proposes a new imperfect interface model simulating the behavior of a thin flexoelectric layer (adhesive) of vanishing thickness, embedded between two flexoelectric media (adherents). The adhesive is assumed to be mechanically compliant and electrically lowly-conducting. The interface model is obtained by using the asymptotic analysis. The contact laws, expressed in terms of the jumps and means values of the displacements, normal derivatives of the displacements, and electric potential across the interface, represent a formal generalization of the soft elastic and piezoelectric interface conditions. A simple application, considering a one-dimensional three-layer composite micro-bar subject to electro-mechanical loads, is developed in order to analytically/numerically assess the asymptotic model. Nonlocal phenomena and end-effects, related to a flexoelectric length-scale parameter, are highlighted. The example illustrates the usefulness of the proposed approach toward the design of thin nano- and microscale devices exploiting the flexoelectric effect.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/314028

Advances in Multiscale and Multifield Solid Material Interfaces
Special Issue Advances in Multiscale and Multifield Solid Material Interfaces
Autore/i: Rizzoni, R.; Lebon, F.; Dumont, S.; Serpilli, M.
Editore: MDPI
Classificazione: 3 Libro
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/298006

SHEAR AND THERMO-HYGROMETRIC PERFORMANCE OF STRUCTURAL INSULATED PANELS COMPRISING EPS CORE AND OSB SKINS
CESARE Conference Publications
Autore/i: Serpilli, M.; Stazi, F.; Lenci, S.; Di Perna, C.
Editore: Jordan University of Science and Technology
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: In the last decades, the need for improved thermal-structural integrated solutions for building construction has prompt towards the development of Structural Insulated Panels (SIPs), a cost-effective wall system capable of transferring shear loads among panel layers and minimizing localized heat loss This study explored both mechanical and thermal behaviour of SIPs, composed by an Expanded Polystyrene (EPS) core within two oriented strand board (OSB) sheets. Six panels (1200x1200x170mm3) were tested under in-plane horizontal load in two configurations: (i) three single SIP wall; (ii) three double SIPs wall, joined together with a block spline and metal connections. Both specimens were anchored to a lower steel metal beam through anchor bolts and hold-downs. Moreover, the panels were characterized as regard the steady-state thermal behaviour. The study demonstrated that this wall system is a viable solution for sustainable buildings since it presents high shear strength, elevated ductility and good thermal-hygrometric performance.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/304919

Editorial for the Special Issue “Advances in Multiscale and Multifield Solid Material Interfaces”
Editorial for the Special Issue “Advances in Multiscale and Multifield Solid Material Interfaces”
Autore/i: Rizzoni, Raffaella; Lebon, Frédéric; Dumont, Serge; Serpilli, Michele
Editore: MDPI
Luogo di pubblicazione: ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/297924

Interface Models in Coupled Thermoelasticity
TECHNOLOGIES
Autore/i: Serpilli, Michele; Dumont, Serge; Rizzoni, Raffaella; Lebon, Frédéric
Classificazione: 1 Contributo su Rivista
Abstract: This work proposes new interface conditions between the layers of a three-dimensional composite structure in the framework of coupled thermoelasticity. More precisely, the mechanical behavior of two linear isotropic thermoelastic solids, bonded together by a thin layer, constituted of a linear isotropic thermoelastic material, is studied by means of an asymptotic analysis. After defining a small parameter ε, which tends to zero, associated with the thickness and constitutive coefficients of the intermediate layer, two different limit models and their associated limit problems, the so-called soft and hard thermoelastic interface models, are characterized. The asymptotic expansion method is reviewed by taking into account the effect of higher-order terms and defining a generalized thermoelastic interface law which comprises the above aforementioned models, as presented previously. A numerical example is presented to show the efficiency of the proposed methodology, based on a finite element approach developed previously.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/288774

Higher order interface conditions for piezoelectric spherical hollow composites: Asymptotic approach and transfer matrix homogenization method
COMPOSITE STRUCTURES
Autore/i: Serpilli, M.; Rizzoni, R.; Dumont, S.; Lebon, F.
Classificazione: 1 Contributo su Rivista
Abstract: The paper describes the mechanical behavior of composites made of piezoelectric spheres in perfect or imperfect contact. The imperfect contact is achieved by interposing piezoelectric thin adhesive layers between the spheres. First, using asymptotic analysis, transmission conditions of imperfect interface equivalent to the behavior of piezoelectric adhesive layers are obtained at order 0 and 1. These transmission conditions are calculated for ”hard” adhesives, i.e. adhesive materials whose electromechanical constants do not rescale with their thickness. Next, under the assumption of spherical symmetry, the transmission conditions are condensed to a general law of imperfect contact, able to simultaneously describe different contact regimes: piezoelectric hard (order 0 and 1) and soft (or spring-type, order 0 and 1) interface conditions, the perfect continuity conditions, and the piezoelectric rigid (Gurtin–Murdoch or membrane-type) conditions. Lastly, following Bufler’s approach, the homogenization problem of a spherical hollow piezoelectric assembly is solved, extending the classical transfer matrix method to take into account the presence of thin adhesive layers described using the proposed transmission conditions of imperfect contact. A simple numerical example is provided, illustrating the correctness and effectiveness of the homogenization approach in describing the electromechanical behavior of spherical piezoelectric assemblies.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/292414

Earthen claddings in lightweight timber framed buildings: An experimental study on the influence of fir boards sheathing and GFRP jacketing
CONSTRUCTION AND BUILDING MATERIALS
Autore/i: Serpilli, M.; Stazi, F.; Chiappini, G.; Lenci, S.
Classificazione: 1 Contributo su Rivista
Abstract: The aim of this research was to investigate the mechanical performance of an earthen massive cladding, recently used for external/internal layers in Platform Frame technology, through an extensive experimental campaign. The masonry is built with extruded unbaked earth blocks and characterized by dovetail horizontally staggered bed joints. The wall is secured to the structural timber studs through 45 degree-angled fir boards sheathing panels, fixed with steel connectors, and finished with an external plaster with an embedded Glass Fibre Reinforced Polymer (GFRP) mesh, wrapping the whole masonry. The influence of the fir board panels and GFRP jacketing on the mechanical behavior of the earth blocks masonry is investigated and compared with the results obtained for the unreinforced configuration (bare wallettes) in (Stazi et al., 2020). The experimental program consisted of compression, diagonal compression and combined shear-compression tests on 18 wallettes. Digital Image Correlation technique was also adopted to investigate the full field strain maps. The results showed that under compression all the samples (with and without reinforcements) behave as a series of independent slender columns, without significant differences among reinforcement type. Both diagonal compression and shear with compression tests revealed the optimal behavior of GFRP plaster reinforcement that increases the strength values and thanks to an effective confinement effect, limits the out-of-plane bending and determines a monolithic response of the wall.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/288772

A Preliminary Validation of a New Surgical Procedure for the Treatment of Primary Bladder Neck Obstruction Using a Computational Modeling Approach
BIOENGINEERING
Autore/i: Serpilli, Michele; Zitti, Gianluca; Dellabella, Marco; Castellani, Daniele; Maranesi, Elvira; Morettini, Micaela; Lenci, Stefano; Burattini, Laura
Classificazione: 1 Contributo su Rivista
Abstract: A new surgical procedure for the treatment of primary bladder neck obstruction with maintenance of anterograde ejaculation is proposed. In place of monolateral or bilateral bladder neck incision, associated with a loss of ejaculation rate of up to 30%, the new surgical procedure consists of laser drilling the bladder neck with a number of holes and without muscle fiber disrup- tion. The effect of this novel procedure has been studied numerically, with a simplified two-dimen- sional numerical model of the internal urethral sphincter, varying the position and the number of holes in the fibrotic region of the urethral tissue. Results show an improvement of the urethral sphincter opening by increasing the number of holes, ranging from about 6% to 16% of recovery. Moreover, a non-aligned position of holes positively influences the opening recovery. The concen- trations of maximum principal strain and stress have been registered in the proximity of the inter- face between the physiologic and diseased sphincter, and in those regions where the radial thick- ness is significantly thinner. The effects on the first five patients have been included in the study, showing improvement in micturition, lower urinary tract symptoms, sustained ejaculatory func- tion, and quality of life.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/290912

An experimental and numerical study on the in-plane axial and shear behavior of sprayed in-situ concrete sandwich panels
ENGINEERING STRUCTURES
Autore/i: Serpilli, Michele; Clementi, Francesco; Lenci, Stefano
Classificazione: 1 Contributo su Rivista
Abstract: The pa­per deals with the ex­per­i­men­tal and nu­mer­i­cal char­ac­ter­i­za­tion of the in-plane ax­ial and shear me­chan­i­cal be­hav­ior of sprayed in-situ re­in­forced con­crete (RC) sand­wich pan­els, used as struc­tural walls. Ax­ial com­pres­sion tests were car­ried out on spec­i­mens with dif­fer­ent slen­der­ness ra­tios to study their be­hav­ior un­der ax­ial ver­ti­cal loads. While the di­ag­o­nal com­pres­sion test and shear load with con­stant com­pres­sion test were re­spec­tively per­formed on squared pan­els, an­a­lyz­ing their re­sponse to in-plane hor­i­zon­tal lat­eral forces. Ul­ti­mate ax­ial and shear loads have been ex­per­i­men­tally de­ter­mined and the most sig­nif­i­cant load–dis­place­ment di­a­grams have been re­ported. The ob­tained re­sults have been com­pared with other ex­per­i­men­tal cam­paigns on RC sand­wich pan­els and with con­ven­tional RC walls equa­tions, avail­able in codes of prac­tice and lit­er­a­ture. The struc­tural po­ten­tial­i­ties of RC sand­wich pan­els as load-bear­ing and shear walls are high­lighted. The ex­per­i­men­tal in­ves­ti­ga­tion is cor­rob­o­rated by a 3D non­lin­ear fi­nite el­e­ment (FE) nu­mer­i­cal analy­sis, con­sid­er­ing the in­flu­ence of the in­su­la­tion layer, the ef­fi­ciency of steel con­nec­tors, and the in­volved ma­te­r­ial non­lin­ear­i­ties.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/287329

Experimental study of the mechanical behaviour of a new extruded earth block masonry
CONSTRUCTION AND BUILDING MATERIALS
Autore/i: Stazi, Francesca; Serpilli, Michele; Chiappini, Gianluca; Pergolini, Marianna; Fratalocchi, Evelina; Lenci, Stefano
Classificazione: 1 Contributo su Rivista
Abstract: The aim of this research is to investigate, through the Digital Image Correlation (DIC) technique, the mechanical performance of a new type of earth masonry, built with extruded blocks and characterized by dovetail horizontally staggered bed joints. The experimental program consists of two levels of investigations: (i) preliminary phase on components, (ii) compression, diagonal compression and combined shear-compression tests on 12 wallettes. Regarding the components, results showed that the mean compressive strength of the earth block was low (3.5 MPa) with respect to traditional bricks and similar to adobe blocks. The dovetail joints were effective in their joining role showing a rather good strength (2.4 MPa) when tested in triplet configuration. Regarding the wallettes, the DIC highlighted failure modes complying with the ones of a traditional masonry under shear, while it showed a ‘‘column behaviour” with vertical sliding under compressive tests. Fragile failures occurred during the diagonal compression test. DIC revealed to be a promising technique to recover the full-field strain and crack maps.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/276215

Interface Laws for Multi-physic Composites
Proceedings of XXIV AIMETA Conference 2019. AIMETA 2019. Lecture Notes in Mechanical Engineering
Autore/i: Serpilli, Michele; Rizzoni, Raffaella; Dumont, Serge; Lebon, Frédéric
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The paper describes the mechanical behavior of a composite constituted by two solids, bonded by a thin adhesive layer in a general multi-physic framework, by employing the asymptotic expansion technique. After defining a small parameter ε, which will tend to zero, associated with the thickness and the constitutive coefficients of the intermediate layer, we characterize three different limit models and their associated limit problems: the soft interface model, in which the constitutive coefficients depend linearly on ε; the hard interface model, in which the constitutive properties are independent of ε; the rigid interface model, in which they depend on 1/ε. The asymptotic expansion method is reviewed by taking into account the effect of higher order terms and by defining a general multi-physic interface law which comprises the above aforementioned models. Moreover, the FEM implementation of the transmission model is presented through a numerical example.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/276911

Derivation of Imperfect Interface Laws for Multi-Physic Composites by a Multiscale Approach: Theoretical and Numerical Studies
Developments and Novel Approaches in Biomechanics and Metamaterials. Advanced Structured Materials
Autore/i: Dumont, Serge; Lebon, Frederic; Rizzoni, Raffaella; Serpilli, Michele
Classificazione: 2 Contributo in Volume
Abstract: In the present study, we focus our attention to a specific type of composite, constituted by two media, called the adherents, bonded together with a thin interphase layer, called the adhesive. We assume that the composite constituents are made of different multi-physic materials with highly contrasted constitutive properties. The study considers a generic multi-physic coupling in a very general framework and can be adapted to well-known multi-physic behaviors, such as piezoelectricity, thermo-elasticity, aswell as to multifield microstructural theories, such as micropolar elasticity.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/283230

A RIGOROUS DERIVATION OF THE INTERFACE CONDITIONS IN LINEAR POROELASTIC COMPOSITES
Proceedings of the 6th European Conference on Computational Mechanics (Solids, Structures and Coupled Problems) and 7th. European Conference on Computational Fluid Dynamics
Autore/i: Serpilli, M.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The paper describes the mechanical behavior of two linear isotropic poroe- lastic solids, bonded together by a thin plate-like layer, constituted by a linear isotropic poroelastic material, by means of an asymptotic analysis. After defining a small parameter ε, which will tend to zero, associated with the thickness and the constitutive coefficients of the intermediate layer, we characterize three different limit models and their associated limit problems, the so-called soft, hard and rigid poroelastic interface models, respectively. Moreover, we identify the non classical transmission conditions at the interface between the two three-dimensional bodies in terms of the jump of the stresses, increment of fluid, pressure and displacements.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/262773

Numerical Validation of Multiphysic Imperfect Interfaces Models
FRONTIERS IN MATERIALS
Autore/i: Dumont, S.; Serpilli, M.; Rizzoni, R.; Lebon, F. C.
Classificazione: 1 Contributo su Rivista
Abstract: We investigate some mathematical and numerical methods based on asymptotic expansions for the modeling of bonding interfaces in the presence of linear coupled multiphysic phenomena. After reviewing new recently proposed imperfect contact conditions (Serpilli et al., 2019), we present some numerical examples designed to show the efficiency of the proposed methodology. The examples are framed within two different multiphysic theories, piezoelectricity and thermo-mechanical coupling. The numerical investigations are based on a finite element approach generalizing to multiphysic problems the procedure developed in Dumont et al. (2018).
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/283432

An asymptotic derivation of a general imperfect interface law for linear multiphysics composites
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Autore/i: Serpilli, M.; Rizzoni, R.; Lebon, F.; Dumont, S.
Classificazione: 1 Contributo su Rivista
Abstract: The paper is concerned with the derivation of a general imperfect interface law in a linear multiphysics framework for a composite, constituted by two solids, separated by a thin adhesive layer. The analysis is performed by means of the asymptotic expansions technique. After defining a small parameter ε, which will tend to zero, associated with the thickness and the constitutive coefficients of the intermediate layer, we characterize three different limit models and their associated limit problems: the soft interface model, in which the constitutive coefficients depend linearly on ε; the hard interface model, in which the constitutive properties are independent of ε; the rigid interface model, in which they depend on 1/ε. The asymptotic expansion method is reviewed by taking into account the effect of higher order terms and by defining a general multiphysics interface law which comprises the above aforementioned models.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/268150

Classical and higher order interface conditions in poroelasticity
ANNALS OF SOLID AND STRUCTURAL MECHANICS
Autore/i: Serpilli, M.
Classificazione: 1 Contributo su Rivista
Abstract: The paper deals with the derivation of non classical interface conditions in linear poroelasticity in the framework of the quasi-static diphasic Biot’s model. More precisely, we analyze the mechanical behavior of two linear isotropic poroelastic solids, bonded together by a thin layer, constituted by a linear isotropic poroelastic material, by means of an asymptotic analysis. After defining a small parameter ε, which will tend to zero, associated with the thickness and the constitutive coefficients of the intermediate layer, we characterize three different limit models and their associated limit problems, the so-called soft, hard and rigid poroelastic interface models, respectively. First and higher order interface models are derived. Moreover, we identify the non classical transmission conditions at the interface between the two three-dimensional bodies in terms of the jump of the stresses, specific discharge, pressure and displacements.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/264725

Sustainable Engineering for Resilient Built and Natural Environments
The First Outstanding 50 Years of “Università Politecnica delle Marche”
Autore/i: Alici, Antonello; Bocci, Maurizio; Bonvini, Paolo; Brocchini, Maurizio; Calamai, Alessandro; Canestrari, Francesco; Capozucca, Roberto; Carbonari, Alessandro; Carbonari, Sandro; Cardone, Fabrizio; Clementi, Francesco; Clini, Paolo; Cocchi, Giammichele; Corvaro, Sara; Darvini, Giovanna; Davì, Fabrizio; Dezi, Luigino; Di Giuseppe, Elisa; D’Orazio, Marco; Ferretti, Maddalena; Ferrotti, Gilda; Gara, Fabrizio; Giretti, Alberto; Graziani, Andrea; Lancioni, Giovanni; Lemma, Massimo; Lenci, Stefano; Lorenzoni, Carlo; Malinverni, Eva Savina; Mancinelli, Alessandro; Mariano, Fabio; Mentrasti, Lando; Mondaini, Gianluigi; Montecchiari, Piero; Munafò, Placido; Naticchia, Berardo; Postacchini, Matteo; Quagliarini, Enrico; Quattrini, Ramona; Ragni, Laura; Serpilli, Michele; Soldini, Luciano; Virgili, Amedeo; Zampini, Giovanni
Editore: Springer
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/272866

An Overview of the Structural Safety-Oriented Research in the Region Marche Seismic Area
The First Outstanding 50 Years of “Università Politecnica delle Marche”
Autore/i: Capozucca, R.; Carbonari, S.; Clementi, F.; Cocchi, G.; Davi, F.; Dezi, L.; Gara, F.; Lancioni, G.; Lenci, S.; Mentrasti, L.; Ragni, L.; Serpilli, M.
Editore: Springer, Cham
Classificazione: 2 Contributo in Volume
Abstract: In recent years, Italy has been hit by earthquakes, causing significant damage to masonry and reinforced concrete (RC) structures. Especially, common buildings and ordinary structures in many small historical towns of Italian central regions, such as Marche, have suffered dramatic consequences and destruction. Dynamic analysis and seismic structural safety are important topics in civil engineering, which have been studied and deepened for many years by the researchers of the Structural Division of the Department of Civil and Building Engineering, and Architecture of UnivPM. The researches have been oriented towards the investigation of structures under seismic loads in order to improve the knowledge of the structural response under high actions, due to the soil dynamic movements and, thus, define adequate techniques to strengthen the damaged structures. In this paper we present a wide spectrum of main results of our research group, comprising experimental studies, vulnerability analysis and assessment of existing structures, new methods of modelling and theoretical approaches to define the dynamic behavior of structures, also in presence of damage. Finally, we show and discuss new prospects of research for safety, employing advanced techniques and materials to prevent collapse and/or relevant damages in structures.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/281739

An experimental and numerical study on CLT panels used as infill shear walls for RC buildings retrofit
CONSTRUCTION AND BUILDING MATERIALS
Autore/i: Stazi, F.; Serpilli, M.; Maracchini, G.; Pavone, A.
Classificazione: 1 Contributo su Rivista
Abstract: Cross Laminated Timber (CLT) has been gaining more and more attention in research and professional fields as a sustainable and promising construction system for mid- and high-rise structures. The need of buildings higher than those usually built with CLT has pushed the research towards the development of innovative hybrid techniques in which steel framed structures incorporate CLT shear walls. This concept may be potentially extended to existing RC framed buildings, where CLT infill shear walls may constitute the base of an integrated seismic and energy retrofit. In order to investigate this potentiality, this paper presents a preliminary experimental and numerical study focused on the mechanical behavior of CLT panels used as a bracing system. In particular, diagonal compression tests on 3-ply panels have been carried out, also by reproducing a direct load transmission from the RC frame to the CLT infill. A comparison with the results of similar tests on CLT panels (with a different number of layers and thickness) and with unstrengthened and strengthened masonry infill walls has been also provided. In addition, numerical simulations have been carried out, in order to evaluate the changes in RC frame lateral response when CLT infills are added. The results have proved that CLT infills may be used as a strengthening solution, allowing RC frame to reach higher lateral stiffness and peak load values respect to masonry infills.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/264726

Seismic solution based on the use of cross-laminated timber (clt) panels with sliding joints as infilled earthquake bracing system for rc framed architectures
Atti del VI CONVEGNO INTERNAZIONALE SULLA DOCUMENTAZIONE, CONSERVAZIONE E RECUPERO DEL PATRIMONIO ARCHITETTONICO E SULLA TUTELA PAESAGGISTICA DIPARTIMENTO DI INGEGNERIA
Autore/i: Serpilli, M.; Maracchini, G.; Stazi, F.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: Cross Laminated Timber (CLT) has gaining more and more attention in the research and professional field as a sustainable and promising construction system for mid- and high-rise structures. The need of buildings higher than that usually built with CLT has pushed the research towards the development of innovative hybrid techniques in which steel framed structures incorporate CLT shear walls. This concept may be potentially extended to existing RC framed buildings where infilled CLT shear walls may constitute the base for an integrated seismic and energy retrofit solution. In order to investigate this potentiality, this paper present a preliminary experimental study focused on the diagonal strut behaviour of CLT panels. In particular, diagonal compression tests on 3-ply panels have been carried out also by simulating the confinement effect provided by the structural frame. A comparison with the results of similar tests on CLT panels with different number of layers and thickness has been also provided. The results of this research have demonstrated that CLT panels has a higher strength and stiffness if confined. Then, the confinement effect provided by the RC frame on the infill should be accurately considered in the strengthening design.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/264724

Asymptotic Derivation of a Linear Plate Model for SoftFerromagnetic Materials
CHINESE ANNALS OF MATHEMATICS SERIES B
Autore/i: Serpilli, M; Geymonat, G; Krasucki, F
Classificazione: 1 Contributo su Rivista
Abstract: Th e authors use the asymptotic expansion method by P. G. Ciarlet to obtain a Kirchhoff-Love-type plate model for a linear soft ferromagnetic material. They also give amathematical justification of the obtained model by means of a strong convergence result.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/258047

On modeling interfaces in linear micropolar composites
MATHEMATICS AND MECHANICS OF SOLIDS
Autore/i: Serpilli, Michele
Classificazione: 1 Contributo su Rivista
Abstract: This paper describes the mechanical behavior of two linear micropolar solids, bonded together by a thin plate-like layer, constituted of a linear micropolar material, determined by means of an asymptotic analysis. After defining a small parameter ε, which will tend to zero, associated with the thickness and the constitutive coefficients of the intermediate layer, we characterize two different limit models and their associated limit problems, the so-called weak and strong micropolar interface models, respectively. Moreover, we identify the nonclassical transmission conditions at the interface between the two three-dimensional bodies in terms of the increases in the stresses, coupling stresses, displacements, and microrotations. Finally, we prove that the solution of the original problems strongly converges toward the solution of the limit problems, as ε tends to zero.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/246094

Asymptotic piezoelectric plate models in microstretch elasticity
ZEITSCHRIFT FÜR ANGEWANDTE MATHEMATIK UND MECHANIK
Autore/i: Serpilli, Michele
Classificazione: 1 Contributo su Rivista
Abstract: This paper is concerned with the formal deduction of piezoelectric plate models in microstretch elasticity, by means of an asymptotic analysis with respect to a small parameter ε, being the thickness of the plate. Two different boundary conditions pertaining to electric quantities are considered, leading to two different models: the sensor model and the actuator model, respectively. Each of the two plate problems turns out to be decoupled into a bending problem and a certain microstretch membrane problem, partially coupled with the electric behavior.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/251509

Asymptotic interface models in magneto-electro-thermo-elastic composites
MECCANICA
Autore/i: Serpilli, Michele
Classificazione: 1 Contributo su Rivista
Abstract: We study the quasi-static behavior of a magneto-electro-thermo-elastic composite constituted by a thin magneto-electro-thermo-elastic plate-like layer inserted between two generic magneto-electro-thermo-elastic bodies by means of an asymptotic analysis. After defining a small dimensionless parameter, which will tend to zero, we characterize two different limit models and their associated limit problems, the so-called weak and strong magneto-electro-thermo-elastic interface models, respectively. Moreover, we identify the non classical magneto-electro-thermo-elastic transmission conditions at the interface between the two three-dimensional bodies and we prove a weak convergence result.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/239157

An asymptotic plate model for magneto-electro-thermo-elastic sensors and actuators
MATHEMATICS AND MECHANICS OF SOLIDS
Autore/i: Bonaldi, F.; Geymonat, G.; Krasucki, F.; Serpilli, Michele
Classificazione: 1 Contributo su Rivista
Abstract: We present an asymptotic two-dimensional plate model for linear magneto-electro-thermo-elastic sensors and actuators, under the hypotheses of anisotropy and homogeneity. Four different boundary conditions pertaining to electromagnetic quantities are considered, leading to four different models: the sensor–actuator model, the actuator–sensor model, the actuator model and the sensor model. We validate the obtained two-dimensional models by proving weak convergence results. Each of the four plate problems turns out to be decoupled into a flexural problem, involving the transversal displacement of the plate, and a certain partially or totally coupled membrane problem.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/229787

Interface models with microstructure via an asymptotic approach
AIMETA 2017 - Proceedings of the 23rd Conference of the Italian Association of Theoretical and Applied Mechanics
Autore/i: Serpilli, Michele
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The paper describes the mechanical behavior of two linear isotropic microstretch solids, bonded together by a thin plate-like layer, constituted by a linear isotropic microstretch material, by means of an asymptotic analysis. After defining a small parameter ϵ, which will tend to zero, associated with the thickness and the constitutive coefficients of the intermediate layer, we characterize two different limit models and their associated limit problems, the socalled weak and strong microstretch interface models, respectively. Moreover, we identify the non classical transmission conditions at the interface between the two three-dimensional bodies in terms of the jump of the stresses, couple stresses, microstresses, displacements, microrotations and microstretch functi.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/258044

Magneto-electro-thermo-elastic interface models: an asymptotic approach
Book of papers ICTAM 2016
Autore/i: Serpilli, Michele
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: We study the quasi-static behavior of a magneto-electro-thermo-elastic assembly constituted by a thin magneto-electro-thermo- elastic plate-like layer inserted between two generic magneto-electro-thermo-elastic bodies by means of an asymptotic analysis. After defining a small dimensionless parameter ε, which will tend to zero, we characterize two different limit models and their associated limit problems, the so-called weak and strong magneto-electro-thermo-elastic interface models, respectively. Moreover, we identify the non classical magneto-electro-thermo-elastic transmission conditions at the interface between the two three-dimensional bodies.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/238554

An overview of different asymptotic models for anisotropic three-layer plates with soft adhesive
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Autore/i: Serpilli, Michele; Lenci, Stefano
Classificazione: 1 Contributo su Rivista
Abstract: We give an overview of the possible asymptotic models for a layered plate with soft adhesive. More specifically, we study the mechanical behavior of an anisotropic nonhomogeneous linearly elastic three-layer plate with soft adhesive, including the inertia forces, by means of the asymptotic expansion method. By defining a small parameter ε, associated with the size and the stiffness of the intermediate layer, we derive various limit models and their corresponding limit problems, by varying the thickness and rigidity ratios of the adherents and the adhesive layers.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/229786

Asymptotic curved interface models in piezoelectric composites
COMPTES RENDUS MECANIQUE
Autore/i: Serpilli, Michele
Classificazione: 1 Contributo su Rivista
Abstract: We study the electromechanical behavior of a thin interphase, constituted by a piezoelectric anisotropic shell-like thin layer, embedded between two generic three-dimensional piezoelectric bodies by means of the asymptotic analysis in a general curvilinear framework. After defining a small real dimensionless parameter ε, which will tend to zero, we characterize two different limit models and their associated limit problems, the so-called weak and strong piezoelectric curved interface models, respectively. Moreover, we identify the non-classical electromechanical transmission conditions at the interface between the two three-dimensional bodies.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/239154

Mathematical Models For Thin Piezoelectric Interphases Including Thermal Effects
Proceedings of the 4th International Conference on Material Modeling
Autore/i: Serpilli, Michele
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: We study the thermo-electromechanical behavior of a thin interphase, constituted by a piezoelectric anisotropic thin layer, embedded between two generic three-dimensional piezoelectric bodies by means of the asymptotic anal- ysis including also thermal effects. After defining a small real dimensionless parameter ε, which will tend to zero, we characterize two different limit models and their associated limit problems, the so-called weak and strong thermo-piezoelectric interface models, respectively. Moreover, we identify the non classical thermo-electromechanical transmission conditions at the interface between the two three-dimensional bodies.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/234650

Rational models for piezoelectric curved interfaces
Proceedings Congresso AIMETA 2015
Autore/i: Serpilli, Michele
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: We study the electromechanical behavior of a thin interphase, constituted by a piezo- electric anisotropic shell-like thin layer, embedded between two generic three-dimensional piezo- electric bodies by means of the asymptotic analysis in a general curvilinear framework. After defining a small real dimensionless parameter ε, which will tend to zero, we characterize two different limit models and their associated limit problems, the so-called weak and strong piezoelectric curved interface models, respectively. Moreover, we identify the non classical electromechanical transmis- sion conditions at the interface between the two three-dimensional bodies.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/233667

Mathematical Modeling of Weak and Strong Piezoelectric Interfaces
JOURNAL OF ELASTICITY
Autore/i: Serpilli, Michele
Classificazione: 1 Contributo su Rivista
Abstract: We study the electromechanical behavior of a thin interphase, constituted by a piezoelectric anisotropic thin layer, embedded between two generic three-dimensional piezoelectric bodies by means of the asymptotic analysis. After defining a small real dimensionless parameter ε, which will tend to zero, we characterize two different limit models and their associated limit problems, the so-called weak and strong interface models, respectively. Moreover, we identify the non classical electromechanical transmission conditions at the interface between the two three-dimensional bodies.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/228071

Temperature influence on smart structures: a first approach
Proceedings of the World Congress on Computational Mechanics
Autore/i: Bonaldi, F.; Geymonat, G.; Krasucki, F.; Serpilli, Michele
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: We study a linear coupled thermo-electromagnetoelastic problem and the nondi- mensionalization of the corresponding linear mixed parabolic-hyperbolic system. We deduce from the quasi-static equations a thin thermo-electromagnetoelastic plate model through the asymptotic expansions method.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/211513

An asymptotic model of a multimaterial with a thin piezoeletric interphase
COMPTES RENDUS MECANIQUE
Autore/i: Serpilli, Michele
Classificazione: 1 Contributo su Rivista
Abstract: We study the electromechanical behavior of a multimaterial constituted by a linear piezoelectric transversely isotropic plate-like body with high rigidity embedded between two generic three-dimensional piezoelectric bodies by means of the asymptotic expansions method. After defining a small real dimensionless parameter, which will tend to zero, we characterize the limit model and the associated limit problem. Moreover, we identify the non classical electromechanical transmission conditions between the two three-dimensional bodies.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/145077

Asymptotic analysis of a multimaterial with a thin piezoelectric interphase
MECCANICA
Autore/i: Serpilli, Michele
Classificazione: 1 Contributo su Rivista
Abstract: We study the electromechanical behavior of a multimaterial constituted by a lin- ear piezoelectric transversely isotropic plate-like body with high rigidity embedded between two generic three-dimensional piezoelectric bodies by means of the asymptotic expansion method. After defining a small real dimensionless parameter ε, which will tend to zero, we characterize the limit model and the associated limit problem. We give also a mathemati- cal justification of the model by means of a functional convergence argument. Moreover, we identify the non classical electromechanical transmission conditions between the two three-dimensional bodies.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/158723

Asymptotic expansions and domain decomposition
Proceedings of 21st International Conference on Domain Decomposition Methods
Autore/i: Geymonat, G.; Hendili, S.; Krasucki, F.; Serpilli, Michele; Vidrascu, M.
Editore: Sassi T.,Pichot G.,Gander M.J.,Erhel J.,Widlund O.,Halpern L.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: At a first glance asymptotic expansions and domain decomposition are two alternatives to efficiently solve multi scale elasticity problems. In this paper we will combine these two methods: we will use, for several types of problems, asymptotic expansions and show that for an efficient implementation of problems obtained at the asymptotic limit it may be useful to use domain decomposition type algorithms.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/143680

Asymptotic modeling of a thin anisotropic piezoelectric interphase
Proceedings of the World Congress on Computational Mechanics
Autore/i: Serpilli, Michele
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: We study the electromechanical behavior of a thin interphase, constituted by a linearly piezoelectric anisotropic material with high rigidity, embedded between two generic three-dimensional piezoelectric bodies by means of the asymptotic expansion method. After defining a small real dimensionless parameter ε, which will tend to zero, we characterize the limit model and the associated limit problem. Moreover, we identify the non classical electromechanical transmission conditions at the interface between the two three-dimensional bodies.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/211514

An Asymptotic Strain Gradient Reissner-Mindlin Plate Model
PROCEEDINGS OF THE EUROMECH COLLOQUIUM N. 541: NEW ADVANCES IN THE NONLINEAR DYNAMICS AND CONTROL OF COMPOSITES FOR SMART ENGINEERING DESIGN
Autore/i: Serpilli, Michele; Krasucki, F.; Geymonat, G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/154502

A limit model for a multimaterial with a thin piezoelectric inclusion
Atti del XXI Congresso AIMETA
Autore/i: Serpilli, Michele
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/121062

Asymptotic modeling of a piezoelectric layered assembly
Proceedings 3rd International Conference on Material Modelling
Autore/i: Serpilli, Michele
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/154503

A strain gradient Reissner-Mindlin micro-plate model obtained through an asymptotic analysis
Research and Applications in Structural Engineering, Mechanics & Computation: Proceedings of the Fifth International Conference on Structural Engineering, Mechanics & Computation
Autore/i: Serpilli, Michele
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: In this paper we derive a strain gradient plate model from the three-dimensional equations of strain gradient linearized elasticity by means of an asymptotic analysis. The body is constituted by a second gradient isotropic linearly elastic material. The obtained model is recognized as a strain gradient Reissner- Mindlin plate model.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/142277

An asymptotic strain gradient Reissner-Mindlin plate model
MECCANICA
Autore/i: Serpilli, Michele; Krasucki, F.; Geymonat, G.
Classificazione: 1 Contributo su Rivista
Abstract: In this paper we derive a strain gradient plate model from the three-dimensional equations of strain gradient linearized elasticity. The deduction is based on the asymptotic analysis with respect of a small real parameter being the thickness of the elastic body we consider. The body is constituted by a second gradient isotropic linearly elastic material. The obtained model is recognized as a strain gradient Reissner-Mindlin plate model. We also provide a mathematical justification of the obtained plate model by means of a variational weak convergence result.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/112870

An Asymptotic Second Gradient Reissner-Mindlin Plate Model
Proceedings 8th European Solid Mechanics Conference
Autore/i: Serpilli, Michele; Krasucki, F.; Geymonat, G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/86951

A SECOND GRADIENT REISSNER-MINDLIN PLATE MODEL VIA THE ASYMPTOTIC EXPANSIONS METHOD
Proceedings 38th Solid Mechanics Conference - Polish Academy of Science
Autore/i: Serpilli, Michele; Krasucki, F.; Geymonat, G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/86952

Asymptotic modelling of the linear dynamics of laminated beams
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Autore/i: Serpilli, Michele; Lenci, Stefano
Classificazione: 1 Contributo su Rivista
Abstract: We study the linear dynamics of a layered elastic beam by means of the asymptotic expansion method. The beam consists of three linearly elastic isotropic layers: the middle layer is considered to be thinner and softer than the upper and lower ones. We characterize the limit models by distinguishing three cases of natural frequencies: the low frequencies associated with flexural vibrations, the mean frequencies associated with axial vibrations and the high frequencies, associated with transversal shear and pinching vibrations.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/66271

Limit models for the linear dynamics of a layered beam with soft adhesive
AIMETA 2011 - Atti del Congresso
Autore/i: Serpilli, Michele; Lenci, Stefano
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/63432

Asymptotic models for the linear dynamics of a laminated beam
Book of abstracts - 2nd International Conference on Material Modelling
Autore/i: Serpilli, Michele; Lenci, Stefano
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/63433

Asymptotic Analysis of Shell-like Inclusions with High Rigidity
JOURNAL OF ELASTICITY
Autore/i: Bessoud, A. L.; Krasucki, F.; Serpilli, Michele
Editore: Kluwer Academic Publishers:Journals Department, PO Box 322, 3300 AH Dordrecht Netherlands:011 31 78 6576050, EMAIL: frontoffice@wkap.nl, kluweronline@wkap.nl, INTERNET: http://www.kluwerlaw.com, Fax: 011 31 78 6576254
Classificazione: 1 Contributo su Rivista
Abstract: We study the problem of an elastic shell-like inclusion with high rigidity in a three-dimensional domain by means of the asymptotic expansion method. The analysis is carried out in a general framework of curvilinear coordinates. After defining a small real adimensional parameter ε, we characterize the limit problems when the rigidity of the inclusion has order of magnitude 1/ε and 1/ε^3 with respect to the rigidities of the surrounding bodies. Moreover, we prove the strong convergence of the solution of the initial three-dimensional problem towards the solution of the simplified limit problem.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/53956

Asymptotic analysis of rigid shell-like inclusions
Poster Session - Second Workshop on Thin Structures
Autore/i: Bessoud, A. L.; Krasucki, F.; Serpilli, Michele
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/86953

The Cesàro-Volterra path integral formula on a surface
Poster Session - Second Workshop on Thin Structures
Autore/i: Serpilli, Michele; Ciarlet, P. G.; Gratie, L.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/86954

Shell-like inclusions with high rigidity: an asymptotic approach
Atti del XIX Congresso AIMETA
Autore/i: Serpilli, Michele; Bessoud, A. L.; Krasucki, F.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/49921

Cesàro-Volterra path integral formula on a surface
MATHEMATICAL MODELS AND METHODS IN APPLIED SCIENCES
Autore/i: Ciarlet, P. G.; Gratie, L.; Serpilli, Michele
Classificazione: 1 Contributo su Rivista
Abstract: If a symmetric matrix field e = (eij ) of order three satisfies the Saint-Venant compati- bility relations in a simply-connected open subset Ω of R3, then e is the linearized strain tensor field of a displacement field v of Ω, i.e. e = 1 (∇vT + ∇v) in Ω. A classical 2 result, due to Ces`aro and Volterra, asserts that, if the field e is smooth, the unknown displacement field v(x) at any point x ∈ Ω can be explicitly written as a path integral inside Ω with endpoint x, and whose integrand is an explicit function of the functions eij and their derivatives. Now let ω be a simply-connected open subset in R2 and let θ : ω → R3 be a smooth immersion. If two symmetric matrix fields (γαβ) and (ραβ) of order two satisfy appropriate compatibility relations in ω, then (γαβ ) and (ραβ ) are the linearized change of metric and change of curvature tensor field corresponding to a displacement vector field η of the surface θ(ω). We show here that a “Ces`aro–Volterra path integral formula on a surface” likewise holds when the fields (γαβ) and (ραβ) are smooth. This means that the displacement vector η(y) at any point θ(y), y ∈ ω, of the surface θ(ω) can be explicitly computed as a path integral inside ω with endpoint y, and whose integrand is an explicit function of the functions γαβ and ραβ and their covariant derivatives.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/38765

Multimaterials with shell-like reinforcement
Proceedings of 36th Mechanics Conference
Autore/i: Serpilli, Michele; Bessoud, A. L.; Krasucki, F.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/49184

Plate-like and shell-like inclusions with high rigidity
COMPTES RENDUS MATHÉMATIQUE
Autore/i: Bessoud, A. L.; Krasucki, F.; Serpilli, Michele
Editore: Paris : Elsevier 2002-
Classificazione: 1 Contributo su Rivista
Abstract: We study the problem of an elastic inclusion with high rigidity in a 3D domain. First we consider an inclusion with a plate-like geometry and then in the more general framework of curvilinear coordinates, an inclusion with a shell-like geometry. We compare our formal models to those obtained by Chapelle–Ferent and by Bessoud et al.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/38762

Limit models in the analysis of three different layered elastic strips
EUROPEAN JOURNAL OF MECHANICS. A, SOLIDS
Autore/i: Serpilli, Michele; Lenci, Stefano
Classificazione: 1 Contributo su Rivista
Abstract: The mechanical behavior of three types of laminated strips is investigated. They are made of three layers filled with homogeneous, isotropic and elastic materials; the upper and lower layer are called adherents, the middle layer is called adhesive. The first model studies a strip consisting of three layers made of materials with similar stiffness; the second one concerns with a strip in which the adhesive is soft; in particular, we suppose that the elastic stiffness of the middle layer is two orders of magnitude smaller than that of the upper and lower layers; the third case is a strip in which the core is thinner and stiffer than the two adherents: the elastic modula of the adherents are one order of magnitude bigger that those of the adhesive. After identifying a parameter of smallness ε (which measures the thickness and the stiffness of each layer), the limit of the solution when ε tends to zero has been considered. Afterwards, it has been shown that each solution of the simplified models verifies the so-called limit problems, written using a “weak” and a “strong” formulation. The existence and uniqueness of the solutions of each limit problem have been established. The strong convergence of the exact solutions towards the solution of the limit problem of the first model has been established, too.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/51719

Explicit reconstruction of a displacement field on a surface by means of its linearized change of metric and change of curvature tensors
COMPTES RENDUS MATHÉMATIQUE
Autore/i: Ciarlet, P. G.; Gratie, L.; Serpilli, Michele
Editore: Paris : Elsevier 2002-
Classificazione: 1 Contributo su Rivista
Abstract: Let ω be a simply-connected open subset in R2 and let θ : ω → R3 be a smooth immersion. If two symmetric matrix fields (γαβ ) and (ραβ ) of order two satisfy appropriate compatibility relations in ω, then (γαβ ) and (ραβ ) are the linearized change of metric and change of curvature tensor fields corresponding to a displacement vector field η of the surface θ(ω). We show here that, when the fields (γαβ) and (ραβ) are smooth, the displacement vector η(y) at any point θ(y),y ∈ ω, of the surface θ(ω) can be explicitly computed by means of a “Cesàro–Volterra path integral formula on a surface”, i.e., a path integral inside ω with endpoint y, and whose integrand is an explicit function of the functions γαβ and ραβ and their covariant derivatives.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/38763

Asymptotic analysis of three cases of layered strips
Proc. of 18th AIMETA Congress of Theoretical and Applied Mechanics
Autore/i: Serpilli, Michele; Lenci, Stefano
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/52260

Une déduction géométrique de la cinématique des modèles classiques de plaque
Atti del XVIII CFM
Autore/i: G., Geymonat; F., Krasucki; Serpilli, Michele
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/49920

A geometrical derivation of classical plate kinematics
Atti del XVIII Congresso AIMETA
Autore/i: Geymonat, G; Krasucki, F; Serpilli, Michele
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/49183

The Kinematics of Plate Models: A Geometrical Deduction
JOURNAL OF ELASTICITY
Autore/i: Geymonat, G; Krasucki, F.; Serpilli, Michele
Classificazione: 1 Contributo su Rivista
Abstract: We present a deduction of the Kirchhoff-Love and Reissner-Mindlin kinematics of a simply- connected plate by using the formal asymptotic developments method applied to the compatibility conditions of Saint-Venant and the formula of Cesàro-Volterra. This formal deduction is purely geometrical because we do not use any information coming from the loading or the constitutive behavior.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/38764

Asymptotic analysis of layered elastic beams
COMPTES RENDUS MECANIQUE
Autore/i: Serpilli, Michele
Editore: Editions Scientifique & Medical Elsevier:23 Rue Linois, F 75724 Paris Cedex 15 France:011 33 1 71724646, INTERNET: http://www.elsevier.fr, Fax: 011 33 1 71724664
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/38760