International Journal of Engineering Science最新文献

{"title":"A time-domain viscoelastic model of nonlinear compression behavior under cyclic loading","authors":"Jia-Xuan He ,&nbsp;Zhao-Dong Xu ,&nbsp;Qiang-Qiang Li ,&nbsp;Zhong-Wei Hu ,&nbsp;Ya-Xin Wei ,&nbsp;Teng Ge ,&nbsp;Yao-Rong Dong ,&nbsp;Xing-Huai Huang ,&nbsp;Gabriele Milani","doi":"10.1016/j.ijengsci.2024.104200","DOIUrl":"10.1016/j.ijengsci.2024.104200","url":null,"abstract":"<div><div>Viscoelastic (VE) pads, commonly employed as passive damping components in damping devices to absorb and dissipate energy, present challenges in predicting the mechanical behavior under large deformation due to significant nonlinearity. This study introduces a novel nonlinear time-domain model to accurately characterize the response of VE pads subjected to cyclic loading across small, moderate, and large compressive deformations. Effects such as strain hardening, the Mullins effect, continuous stress softening, and residual deformation are incorporated into the model. The proposed model integrates hyperelastic, viscoelastic, and elastoplastic parts, arranged in parallel, each addressing distinct aspects of the mechanical behavior. The hyperelastic part captures the time-independent response, in particular strain hardening in nonlinear stiffness. The VE part accounts for the frequency-dependent damping behavior, focusing on the initial unloading stiffness, the shape and area of the hysteresis loop, and major residual deformations. The elastoplastic part models the frequency-dependent plasticity, adjusting residual deformation and determining the extent of Mullins effect and continuous stress softening. Model parameters are determined through fitting procedures using uniaxial quasi-static and cyclic compression test data, allowing for an accurate description of the nonlinear mechanical behavior in the time domain. To assess the prediction capacity and applicability of the proposed model, the simulation results are comparatively evaluated by error analysis. The sensitivity analysis is further performed to investigate the influence of individual parameters. The proposed model demonstrates high accuracy and robustness in representing the mechanical behavior of VE pads across small, moderate, and large compressive deformations. The parameters in the hyperelastic, viscoelastic, and elastoplastic parts have accurate interpretations, providing distinct roles and contributions to the overall mechanical behavior.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"208 ","pages":"Article 104200"},"PeriodicalIF":5.7,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Growth in biphasic tissue","authors":"Marlon Suditsch,&nbsp;Franziska S. Egli,&nbsp;Lena Lambers,&nbsp;Tim Ricken","doi":"10.1016/j.ijengsci.2024.104183","DOIUrl":"10.1016/j.ijengsci.2024.104183","url":null,"abstract":"<div><div>Continuum mechanical models for growth and remodelling of biological tissue are well suited for the description of physiological and pathological processes, such as bone remodelling, muscle adaption or the progression of a tumour. An overview of four selected growth models from the literature is given and fundamental kinematic and multiphasic approaches for open and closed systems are outlined. Beyond that, a biphasic model using the Theory of Porous Media is enhanced by the kinematic split of the deformation gradient for the study of a growing cylinder. Based on the analytical solution of the specific case without outflow, a novel growth approach is developed allowing a gradual consideration of the kinematic split. Subsequently, this approach is applied to the extended case with outflow and evaluated numerically. Herein, consolidating characteristics of growth that are driven by the interaction of fluid pressure and solid stress are identified. Finally, a numerical example of a growing body embedded in surrounding tissue shows that residual compressive stresses arise due to incompatible deformation.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"208 ","pages":"Article 104183"},"PeriodicalIF":5.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Negative electrical conductivity metamaterials and their properties","authors":"Edward Bormashenko","doi":"10.1016/j.ijengsci.2024.104198","DOIUrl":"10.1016/j.ijengsci.2024.104198","url":null,"abstract":"<div><div>The system of non-interacting electrically charged core-massless spring-shell mechanical units, demonstrating negative effective mass, is considered, seen as a Drude–Lorentz gas. When such an ideal gas is exposed to the external harmonic field, it demonstrates as the certain conditions the negative frequency-dependent electrical conductivity. The negative value of the electrical conductivity <span><math><mi>σ</mi></math></span> implies that the electrical current will flow against the direction of the electric field and correspondingly the direction of the electrical force. Low- and high-frequency asymptotic behavior of the electrical conductivity is addressed. The same system demonstrates at low frequencies the negative asymptotic refraction. Experimental realization of the introduced model system, based on the exploitation of plasma oscillations of the free electron gas is suggested.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"208 ","pages":"Article 104198"},"PeriodicalIF":5.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Size-dependent stability of embedded beams with variable cross section","authors":"Ömer Civalek ,&nbsp;Bekir Akgöz","doi":"10.1016/j.ijengsci.2024.104210","DOIUrl":"10.1016/j.ijengsci.2024.104210","url":null,"abstract":"<div><div>This paper deals with the investigation of the elastic stability of double tapered microbeams embedded in Winkler elastic foundation. It is considered that the microbeam is embedded in a continuous elastic constraint and its cross-section changes linearly along the longitudinal direction. Nonlocal couple stress theory and Bernoulli-Euler beam theory are used to obtain the size-dependent constitutive equation. Rayleigh-Ritz method with algebraic polynomials is utilized to find the minimum eigenvalue as the critical buckling load for simply supported tapered microbeams. The effects of taper ratio, taper type, nonlocal and length scale parameters, and foundation parameter are comprehensively examined.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"208 ","pages":"Article 104210"},"PeriodicalIF":5.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On nonlinear 3D electro-elastic numerical modeling of two-phase inhomogeneous FG piezocomposites reinforced with GNPs","authors":"Mohammad Malikan ,&nbsp;Shahriar Dastjerdi ,&nbsp;Magdalena Rucka ,&nbsp;Mehran Kadkhodayan","doi":"10.1016/j.ijengsci.2024.104174","DOIUrl":"10.1016/j.ijengsci.2024.104174","url":null,"abstract":"<div><div>The novelty here comes from not only the perfect nonlinear three-dimensional (3D) electro-elasticity investigation but also the mixed material itself. The literature widely showed mechanical assessments on the piezoelectric structures; however, a lack of nonlinear three-dimensional elasticity studies has been witnessed on these kinds of smart materials. Therefore, a nonlinear 3D elasticity-piezoelectricity coupling is considered in this study. What is more, this research brings about an era in the field of sensing manufacturing such as sensors and actuators by proposing the construction of these devices in an advanced composite framework. The piezoelectric medium can be electro-mechanically improved with the aggregation of graphene platelets/nanoplatelets (GPLs/GNPs) based on the functionally graded (FG) composition. The assumption for such a smart composite has been made to provide higher flexibility smart tools while their elastic strength can also get further. To accomplish this, the derivation of a rigorous mathematical model has come out for a transversely isotropic inhomogeneous FG-piezoelectric beam-like sensor/actuator using 3D kinematic displacements, geometrically nonlinear strains, Lagrange technique, 3D stress-strains tensors, linear elastic material, and in particular Halpin-Tsai micro-mechanic model. Numerical modeling has been built by the generalized differential quadrature (GDQ) technique. A comprehensive parametric study has also been established for intelligent FG beams.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"207 ","pages":"Article 104174"},"PeriodicalIF":5.7,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Large deflection of a nonlocal gradient cantilever beam","authors":"Daniele Ussorio ,&nbsp;Marzia Sara Vaccaro ,&nbsp;Raffaele Barretta ,&nbsp;Raimondo Luciano ,&nbsp;Francesco Marotti de Sciarra","doi":"10.1016/j.ijengsci.2024.104172","DOIUrl":"10.1016/j.ijengsci.2024.104172","url":null,"abstract":"<div><div>Analysing scale phenomena in nanostructures is crucial for modelling and optimizing modern nanotechnological devices. Notably, soft nanostructures can be effectively designed as basic components of smart electro-mechanical systems that require geometrically nonlinear analyses as their structural parts undergo large deflection. Adoption of non-conventional approaches for accurate assessment of size effects is thus needed. The paper investigates the elastostatic behaviour of small-scale beams experiencing large displacements exploiting a consistent model of integral gradient elasticity. An iterative analytical solution procedure is proposed to address the geometrically nonlinear problem of soft nanobeams. The presented nonlocal stress gradient methodology is able to capture both stiffening and softening size-dependent nonlinear responses, thus generalizing the outcomes contributed by <span><span>Vaccaro (2022)</span></span>. Effectiveness of the proposed approach for modelling and designing next-generation smart devices is finally shown by solving applicative nanomechanical problems. The presented methodology can be further extended to nonlinear analyses of three-dimensional nanocontinua to capture size effects of arbitrarily shaped structures undergoing large configuration changes.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"206 ","pages":"Article 104172"},"PeriodicalIF":5.7,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elastic active matter — A composite mechanics approach via non-interaction approximation","authors":"Ivan I. Argatov ,&nbsp;Federico J. Sabina","doi":"10.1016/j.ijengsci.2024.104170","DOIUrl":"10.1016/j.ijengsci.2024.104170","url":null,"abstract":"<div><div>An active composite material is assumed to be composed of a passive isotropic elastic matrix with spherical voids containing active rod-like elements, each of which being in diametrical contact with the void’s surface. A ball-bearing fixation between the rod and the contact pads is assumed, and thereby the normal contact becomes a primary mode through which the rod-like elements transfer active loading to the surrounding elastic matrix. Under the assumption that the radius of contact pads is small compared to the void radius, an asymptotic solution to the corresponding elasticity polarization matrix has been derived by the method of matched asymptotic expansions. The obtained explicit analytical results for the matrix/inclusion contact problem and a non-interaction approximation scheme are utilized for constructing an asymptotic model of the dilute elastic active microstructure.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"206 ","pages":"Article 104170"},"PeriodicalIF":5.7,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On size-dependent mechanics of Mindlin plates made of polymer networks","authors":"Xiao-Jian Xu ,&nbsp;Bo Wang","doi":"10.1016/j.ijengsci.2024.104164","DOIUrl":"10.1016/j.ijengsci.2024.104164","url":null,"abstract":"<div><div>The recent advances of solid mechanics of polymer networks are that they can be well-modelled by a physically-based size-dependent constitutive relation via a simplified strain gradient elasticity theory. However, boundary value problems of plate models composed of polymer networks have not been reported, which limit wide applications of the models in the engineering science. In this paper, we systematically established a variationally consistent boundary value problems of Mindlin plate models for polymer networks leading to the framework of a simplified strain gradient elasticity. This study considers the strain energy produced by the strain gradient in the thickness direction and proposes a well-posed boundary value problem for a Mindlin plate with arbitrary boundaries, discussing possible boundary conditions, especially higher-order nonconventional ones. The senses of stress resultants and double stresses acting on the face of a volume element are firstly explained. Surprisingly, it is found that unexpected corner condition related to normal derivatives of shear force, bending moment, and twisting moment exists for plates with irregular boundaries—contradicting conventional mechanics notions of plates. For illustrative purpose, static bending analyses of a simply supported rectangular plate subjected to a uniformly distributed loading and a concentrated loading are provided. The effective Young's modulus predicted by this approach agrees well with reported result in the open literature. This work may be helpful in developing efficient numerical methods and offers new insights into the existence of corner condition in Mindlin plates within the context of a simplified strain gradient elasticity theory.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"206 ","pages":"Article 104164"},"PeriodicalIF":5.7,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eshelby's inhomogeneity model within Mindlin's first strain gradient elasticity theory and its applications in composite materials","authors":"Koami P. DADABO,&nbsp;Napo BONFOH,&nbsp;Hafid SABAR,&nbsp;Rodrigue MATADI-BOUMBIMBA","doi":"10.1016/j.ijengsci.2024.104167","DOIUrl":"10.1016/j.ijengsci.2024.104167","url":null,"abstract":"<div><div>Eshelby's inhomogeneity problem is solved within the second form of Mindlin's first strain gradient elasticity theory for the prediction of the effective elastic properties of composites. Considering Green's function technique, an integral equation is established for an ellipsoidal inhomogeneity embedded in a homogeneous elastic medium and subjected to non-uniform boundary conditions. Within isotropic elasticity, the mean strain inside a spherical inhomogeneity is detailed to provide analytical results. In addition to the elastic properties of the inhomogeneity and the matrix, the strain localization depends on five gradient elastic constants, introduced by the first strain gradient elasticity theory. The effective bulk and shear moduli of a two-phase composite are predicted through Mori-Tanaka's scheme. The strain localization and the effective elastic moduli are then expressed within some simplified gradient elasticity theories. To test the relevance of the developed model, its predictions are compared with those of some investigations and the effective elastic properties are analyzed for a metal matrix composite. Finally, some comparisons with experimental data are performed to estimate the characteristic length scale parameters and gradient elastic constants of local phases.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"206 ","pages":"Article 104167"},"PeriodicalIF":5.7,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An energy-based fracture criterion for quasi-brittle crack propagation in micropolar continuum: Analytical and numerical study","authors":"Meral Tuna ,&nbsp;Patrizia Trovalusci ,&nbsp;Nicholas Fantuzzi","doi":"10.1016/j.ijengsci.2024.104173","DOIUrl":"10.1016/j.ijengsci.2024.104173","url":null,"abstract":"<div><div>The present study provides closed-form expressions of propagation (kinking) angles by generalizing maximum energy release rate criterion in linear elastic fracture mechanics (LEFM) within micropolar theory of elasticity to address the in-plane, brittle crack propagation phenomenon in size-dependent materials with the presence of particle rotations.</div><div>The accuracy and limitations of the derived formulation is checked by manually detecting the peak point of the energy release rate (ERR) through repetitive numerical simulations performed for arbitrary orientations of infinitesimal branch crack, modelled via magnifying the corresponding region with proper boundary conditions. In both approaches (analytical and numerical), the basic fracture parameters (i.e. stress and couple-stress intensity factors at the main or infinitesimal branch tip) are attained with the aid of micropolar/extended-FEM (micropolar/XFEM) model.</div><div>Through the parametric study, performed for numerous material properties and loading conditions, it is revealed that, as non-locality increases, the variation of propagation angle with the mode mixity ratio substantially diverges from that in Cauchy continuum. It is manifested as a change in the trend of angle-mode mixity ratio curve, and dominated by the stress related intensity factors in the absence of non-singular terms for the considered example. Having a branch orientation approaching to crack’s axis with increased non-locality indicates the practical importance of resorting to non-classical theories for materials with scale effects such as particulate composites, masonry walls, rock-like assemblages, etc. following their disposition to fracture type failure. Moreover, the proposed fracture criterion enables crack propagation simulations within the framework of LEFM by integrating the formulation into a numerical method.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"206 ","pages":"Article 104173"},"PeriodicalIF":5.7,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}