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Effect of inflating air on the static behavior of ETFE cushions J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2024-01-31 Xiaofeng Wang, Yingtao Chen, Qingshan Yang
Inflated membranes are a kind of flexible structure with the enveloping membrane supported by the inflating air. A change in the pressure of the inflating air resulting from the deformation of the enveloping membrane will induce a change in the stress state and stiffness of the enveloping membrane, and hence influence the mechanical behavior of inflated membranes. This paper studies the effect of inflating
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Analytical solutions to buckling analysis of sandwich composite plates with uncertain material properties and dimensions J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2024-01-31 Onur Kaya, Ahmet Sinan Oktem, Sarp Adali
Structures that have thin cross-sections and are prone to compressive loads may buckle suddenly at critical load values. To calculate the critical buckling load, researchers have reported many analytical solutions which are related mainly to the deterministic approach. However, the important geometric and material parameters highly affect critical buckling loads of structures and they should be considered
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A mass spring model applied for characterizing mode I fracture in orthotropic materials J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2024-01-31 Pradeepkumar Suryawanshi, Ramesh Singh, Abhishek Gupta
We describe a mass spring system (MSS), which is also referred as lattice model in the literature, predicting the load-displacement curve of the orthotropic materials. We have developed the MSS model of a double cantilever beam to capture the energy release rate in a mode I fracture of the orthotropic materials using two different formulations: maximum strain energy and maximum strain. Further, we
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Analysis of crack path instabilities in a quenched glass plate using the phase-field cohesive zone model J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2024-01-31 Wei Pan, Radhi Abdelmoula, Jia Li, Changzheng Cheng
Cracks with unstable paths will appear in the glass during quenching. For different quenching speeds and temperatures, there will be linear, oscillatory and bifurcated crack paths. In this work, the phase-field cohesive zone model (PF-CZM) is adopted as the prototype model to address the problem of crack path instabilities in a quenched glass plate. Substituting the temperature field model into the
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Forming mechanics of a twin-roll cast AA1100/409L clad sheet after annealing and cold rolling J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2024-01-31 Gang Chen, Zonghua Wang, Yuanxin Wang
Forming mechanics of a twin-roll cast AA1100/409L clad sheet after annealing and cold rolling was investigated by tensile and three-point bending tests. The effect of mechanical properties of the base metals and bonding strength on the strength and ductility of the clad sheet was investigated based on the mixed rule. The clad sheet’s strength obeys the mixed rule only when the bonding strength is as
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2-D multistable structures under shear: equilibrium configurations, transition patterns, and boundary effects J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2024-01-31 Maor Shuminov, Sefi Givli
Multistable structures have a promising potential in a wide range of engineering and scientific applications, such as shock absorption, soft robotics, superelastic structures, vibration mitigation, foldable structures, configurable structures, programmable materials, and tunable shape-memory structures. In addition, they are directly relevant to the study of materials undergoing martensitic phase transformations
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A rational and efficient local stress recovery method for composite laminates J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-12-22 Jingyu Xu, Guanghui Qing
Common stress recovery methods usually cannot introduce the stress boundary conditions. The general mixed finite element method can only solve the whole model and its calculation requires large memory resources. A stress recovery method using generalized mixed elements in a local model is proposed in this paper. The elements surrounding some nodes where stress results are required are selected to construct
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Analytical evaluation of laminated composite DCB test data for achieving validated modelling analysis J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-12-22 Gang Li, Guillaume Renaud, Chun Li
An analytical solution was developed to study mode I delamination in a laminated composite double cantilever beam (DCB) based on an augmented beam model considering lateral shear. Using the measured DCB compliance, the proposed analytical solution was employed to determine the initial delamination length and its propagation profile. Also, a finite element (FE) correction method was presented to establish
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Interfacial reinforced viscoelastic damper: experimental and theoretical study J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-12-22 Qi He, Zhao-Dong Xu, Yeshou Xu, Hao Hu, Ying-Qing Guo, Xinghuai Huang, Yao-Rong Dong
The interlayer tearing of a plate viscoelastic (VE) damper is an important issue, which may cause failure of the damper. In this work, two new interfacial reinforced damper structures are proposed, which can effectively enhance the working ability of the VE damper. Dynamic performance tests are carried out on the reinforced VE dampers with a series of temperatures, frequencies and displacement amplitudes
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Fast Fourier transform-based solutions of initial value problems for wave propagation in microelastic media J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-12-22 George A. Gazonas, Burak Aksoylu, Raymond A. Wildman
An inverse fast Fourier transform (IFFT) algorithm is developed to solve initial value problems (IVPs) for wave propagation in nonlocal peridynamic media. The IFFT solutions compare well with solutions obtained using Mathematica’s NIntegrate function and are verified using a spherical Bessel function series solution. We solve a peridynamic microelastic IVP by using Floquet theory to determine a nonlinear
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Elastic wave dispersion and polarization in a chiral elastic metamaterial J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-12-22 Xiaodong Wang
The study of wave propagation in chiral elastic systems has important potential applications in areas such as controlling vibrations and wave filtering. Although the behaviour of elastic waves in traditional elastic media is well understood, how elastic waves behave in chiral materials is still to be further explored. We present an analytical study of elastic waves in a new continuous chiral elastic
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Divergence instabilities of nonuniformly prestressed travelling webs J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-12-22 Ciprian D. Coman
The phenomenon of edge-buckling in an axially moving stretched thin elastic web is described as a nonstandard singularly perturbed bifurcation problem, which is then explored through the application of matched asymptotic techniques. Previous numerical work recently reported in the literature is reevaluated in this context by approaching it through the lens of asymptotic simplifications. This allows
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An edge dislocation interacting with an elliptical incompressible liquid inclusion J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-12-22 Xu Wang, Peter Schiavone
We use Muskhelishvili’s complex variable formulation to derive a closed-form solution to the plane strain problem of an elliptical incompressible liquid inclusion embedded in an infinite isotropic elastic matrix subjected to the action of an edge dislocation applied at an arbitrary position. The internal uniform hydrostatic tension within the liquid inclusion and the pair of analytic functions characterizing
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Electroelastic effects on local-global buckling of piezoelectric cylindrical shells with stepped thickness J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-12-22 Guo Fu, Jiawei Zhou, Ting Dai, Andi Lai
The Hamiltonian system is utilized to establish an accurate buckling solution model for piezoelectric material cylindrical shells with stepped thickness. The critical loads and nonuniform buckling modes are obtained by finding the symplectic eigenvalues and eigensolutions of the Hamiltonian equation. The results show that the transition between local buckling and global buckling can be controlled by
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Mixed variational principle for shape memory solids J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-10-25 Vladimir A. Grachev, Yuriy S. Neustadt
The quasistatic deformation problem for shape memory solids is studied based on the measurements of displacements arising from force actions and temperature variations. The phenomenological approach relies on generalization curves for uniaxial tension and compression of specimens at different temperatures. Under proportional loading and at low temperature the alloy behaves as an ideal elastoplastic
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Performance and efficiency of composite shafts supported by active magnetic bearings J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-10-25 Salwa Benali, Taissir Hentati, Slim Bouaziz, Mohamed Haddar
Interest in rotary systems whose performance and efficiency are influenced by their weight as well as guidance type has continued to grow over the last decades. Actually, the dynamic analysis of composite shafts supported by active magnetic bearings (AMBs) seems to be neglected by researchers despite its effect on rotating system efficiency and performance. The novelty of this work lies in the exploration
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Spherical indentation of EPDM and silicone rubber materials under high- and low-temperature conditions J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-10-25 Teng-Fei Zhang, Jie Su, Yuan-Jie Shu, Liao-Liang Ke
In this work, the influence of high and low temperatures on the spherical indentation behavior of EPDM (ethylene propylene diene monomer) and silicone rubber materials is systematically investigated by experiments and numerical simulations. The temperature range is considered from − 40∘ C to 220∘ C. Indentation performances at high and low temperatures are measured by using the electronic universal
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Peridynamic equation with boundary traction J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-10-25 Zaixing Huang
How to characterize the traction boundary condition is still an open question in peridynamics. This problem is investigated in this paper. We propose a traction-associated peridynamic motion equation, in which the traction boundary condition is introduced by a tensor weight function. The conservation laws of linear and angular momentum are derived from the traction-associated peridynamic motion equation
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Influence of surface effect correction on peridynamic simulation of dynamic fractures in brittle materials J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-10-25 Shuang Li, Haining Lu, Xiaohua Huang, Jinghang Mao, Rui Qin
Peridynamics (PD) is a recently proposed nonlocal continuum theory that is particularly suitable for describing fracture mechanics. It employs an integral formulation that remains valid even when discontinuities are present. However, a surface effect exists because of incomplete neighborhoods of boundary points in PD. The surface effect can often be the most significant source of errors in PD simulations
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Laser powder bed fusion of multilayer corrugated sandwich structures: Mechanical properties and failure mechanisms under bending loadings J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-10-25 Xinqiang Lan, Siqi Yang, Liang Meng, Jingxiang Lu, Shuwen Mei, Zemin Wang
The single and multilayer corrugated sandwich structures (number of layers is 1–4) are designed and manufactured by laser powder bed fusion (LPBF). The mechanical properties and failure mechanisms of the as-fabricated structures subjected to quasistatic three-point bending were investigated theoretically, experimentally and numerically. Results demonstrate that structures fabricated by LPBF with the
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On the spatial behavior of solutions for the three-phase-lag thermal model J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-10-25 Ciro D’Apice, Stan Chiriţă
We present an extensive analysis on the spatial behavior of the solutions within the three-phase-lags model of a rigid heat conductor for a semi-infinite cylinder excited on its base. The relaxation time of the temperature gradient has a special significance here, namely (i) in the absence of this relaxation time, we manage to highlight a theorem of the domain of influence, that is, outside of a region
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A double coated circular elastic inhomogeneity with internal uniform deviatoric stresses J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-10-25 Xu Wang, Peter Schiavone
We show that the internal deviatoric stresses within a double coated circular elastic inhomogeneity can remain uniform when the infinite elastic matrix is subjected to a uniform remote deviatoric load. The internal uniform stress field remains valid when the relative thickness of the outer coating is determined through the solution of a cubic equation for given material parameters and the relative
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Nonlinear oscillations in dielectric viscoelastomer generators J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-10-25 Jiameng Li, Yu-Xin Xie
Dielectric elastomer generators (DEGs) are devices that harvest energy from oscillations. We investigate the dynamic behavior of dielectric viscoelastomers in soft generators. Using a viscohyperelastic theoretical model to characterize the relaxation phenomena of the materials, the effects of various factors on the forced oscillation of the system are revealed. According to different failure modes
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Wave reflection and Rayleigh waves in the context of the complete Toupin–Mindlin theory of strain gradient elasticity J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-07-27 Th. Zisis, X. Kuci, H.G. Georgiadis
The present work studies the propagation and reflection of plane waves in an elastic 2D half-space. The material microstructure is taken into account assuming the validity of the complete Toupin–Mindlin theory of isotropic gradient elasticity. This theory involves five additional microstructural material constants besides the two standard Lamé constants of elasticity. Our study builds upon the earlier
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A state-of-art review on the mechanical performance of basalt textile reinforced concrete (BTRC) J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-07-27 Sophia Immanuel, Aniket Ojha, Baskar Kaliyamoorthy, Arun Murugesan
Textile-reinforced concrete (TRC) is a creative emerging composite material with enormous possibilities for structural applications. It makes it possible to fabricate robust, light, and thinner elements with a minimum concrete cover. With the ease of availability of basaltic rocks in India, basalt fibres and basalt biaxial textile meshes have found broad applicability in India and other countries around
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Effect of initial stress on a microstretch thermoelastic medium immersed in an infinite inviscid fluid with two models J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-06-11 Mohamed I. A. Othman, Sarhan Y. Atwa, Ebtesam E. M. Eraki, Mohamed F. Ismail
We study the thermoelastic response of a microstretch half-space immersed in an unbounded, inviscid fluid under initial stress; the medium is studied using the Green–Naghdi theory (G-N III) and the three-phase-lag (3PHL) model. The relevant equations were formulated in the context of the G-N III theory and the 3PHL model. We obtain an analytical solution to the problem using normal mode methods. Magnesium
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Deformations and internal forces in arches under a concentrated force J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-06-11 László Péter Kiss, Pusta Jalalova, Ziya Mehdiyev
The current work intends to establish a new geometrically nonlinear model to find the typical fields (displacements, inner forces) in circular shallow arches under the action of a central concentrated load. Nonlinearities are taken into account through the rotations. The primary unknown is the displacement field. The principle of virtual work is used to find the static equilibrium equations. The analytical
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Strength prediction model for foamed cellular concrete J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-05-30 Facundo Atuel Retamal, Viviana Carolina Rougier
A working line for the development of strength prediction models for foamed cellular concrete (FCC) consists of taking models designed for normal concrete (NC) and adapting them to incorporate the particular characteristics of this material. In this work, a new strength prediction model for FCC is presented. In it, the specific densities of composing materials and their relative amounts to cement,
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Linearized ordinary state-based peridynamic micromechanics of composites J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-05-30 Valeriy A. Buryachenko
The most important feature of peridynamic modeling is the use of summation of force interactions between material points for a continuum description of material behavior. Contrary to the local theory of elasticity, the peridynamic equation of motion proposed by Silling (J. Mech. Phys. Solids 2000; 48:175–209) is free of spatial derivatives of the displacement field. A linearization theory of the peridynamic
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Pull-in instability of multilayered quasicrystal cantilever nanoactuator with bonding imperfections based on nonlocal theory J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-05-30 Yunzhi Huang, Huayong Zheng, Xiuhua Chen, Miaolin Feng
Quasicrystal (QC) nanostructures are promising for use as sensors/detectors in nanoelectromechanical systems. For this application, size dependence, surface loading, and interlaminar bonding imperfections should be considered in the theoretical analysis. Herein, the pull-in instability of a QC cantilever nanoactuator incorporating the piezoelectric effect, size effect, and nanoscale interactions is
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Active vibration control for three-dimensional braided composite beams based on piezoelectric sensor and actuator J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-05-30 Xuewen Shao, Gaofeng Wei, Anqing Li
In this paper, an active vibration control model of the three-dimensional (3-D) braided piezoelectric composite beam (BPCB) is developed by using piezoelectric ceramic layers as sensor and actuator. The mechanical parameters of 3-D braided composites with different braided angles and volume fractions are predicted through finite element simulation of a representative volume unit (RVU). Based on Euler–Bernoulli
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A nonlinearly coupled thermoelectric circular inhomogeneity with interface slip and diffusion J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-05-30 Xu Wang, Peter Schiavone
We first examine the problem associated with the thermoelectric and thermoelastic fields for a nonlinearly coupled thermoelectric circular inhomogeneity with interface slip and diffusion embedded in an infinite nonlinearly coupled thermoelectric matrix subjected to uniform remote electric current density and uniform remote energy flux. A closed-form solution to the time-dependent thermoelastic problem
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Analytical estimation of cohesive parameters for a bilinear traction-separation law in DCB mode I loading J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-05-05 Gang Li
In this study, analytical solutions for estimating two cohesive parameters, stiffness and strength in a bilinear traction law, were developed in conjunction with the ASTM double-cantilever beam (DCB) mode I testing. A zero-thickness elastic foundation zone containing two layers in series was assumed in the analytical derivation: a cohesive zone located underneath a beam elastic zone that is adjacent
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On the effectiveness of convolutive type variational principles in the numerical solution of viscoelastic problems J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-05-05 Angelo Carini, Francesca Levi, Francesco Genna
With reference to the nonaging linear viscoelastic problem, three convolutive type variational formulations existing in the literature are critically reviewed: the Gurtin formulation, the split Gurtin formulation and the Huet formulation. The formulations are used for the numerical solution of the hereditary viscoelastic problem through spatial and temporal discretizations considering both a finite
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Bending, buckling and free vibration of Timoshenko beam-based plane frame via FEM with nonlocal integral model J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-05-05 Yuan Tang, Hai Qing
A finite element method is developed to study the size-dependent static bending, elastic buckling and free vibration of Timoshenko beam-based plane frame using two-phase local/nonlocal integral model. The explicit expression for the stiffness matrix, geometric stiffness matrix and mass matrix is derived. Coordinate transformation is employed to obtain the stiffness matrix, the geometric stiffness matrix
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Two collinear cracks in a transversely isotropic medium under the hyperbolic heat conduction law J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-05-05 Sourav Kumar Panja, Subhas Chandra Mandal
The problem of two collinear cracks in an infinite thermoelastic transversely isotropic medium under non-Fourier heat conduction law is studied. The considered cracks are thermally insulated, which do not admit any disturbances of thermal flow across the cracks. The mode II thermal stress intensity factor and crack opening displacement are derived for a stress free boundary condition and plotted to
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Mode III fracture analysis of an oblique through-crack emanating from a nanohole with surface effect J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-05-05 Yuyan Xin, Junhua Xiao
The mode III fracture characteristics of an oblique through-crack emanating from a circular nanohole are studied theoretically. Based on the surface elasticity theory and the complex variable elasticity theory, the expression of the stress field of the cracked hole is obtained. Analytical solutions of the stress intensity factor and the energy release rate cracks tip are given. A comparison between
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Nonconforming generalized H-R mixed element for static and dynamic analysis of piezoelectric composite laminated plates J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-05-05 Chenchen Li, Yanhong Liu, Yuhang Wang
A nonconforming generalized H-R mixed finite element is developed for static and dynamic analysis of piezoelectric composite laminated plates. The overall structure is solved discretely using 8-node hexahedral nonconforming solid elements, discarding many of the artificial assumptions in the plate and shell theories. The displacement and stress can be obtained directly through linear equations, including
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A novel mass spring model for simulating deformable objects J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-04-18 Pradeepkumar Suryawanshi, Abhishek Gupta
Mass-spring system (MSS) and finite element method (FEM) are extensively used methods for simulating deformable objects. Though MSS is approximate, it is computationally less taxing and hence attractive for performing real-time simulations. One of the major challenges in using MSS is the determination of system parameters such as node mass, spring stiffness, spring damping coefficients and mesh topology
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Analytical model for tension-induced residual stress of pre-stress filament hoop wound composite rings by inverse iteration method J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-04-18 Junsheng Wang, Jun Xiao, Dajun Huan, Zhiyang Liu, Jie Chen, Lei Yan
Stress states of pre-stress filament wound parts are crucial to their design. However, proposed models exhibit certain errors that cannot be neglected. To minimize these errors, we propose an analytical model for tension-induced residual stress of composite rings with a metal liner based on elastic cylinder theory. The contributions of stress variation of inner layers on the entire part are calculated
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Nonlinear vibration of functionally graded circular nanoplates based on the stress-driven method J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-04-18 Mohammad Shishesaz, Mojtaba Shariati, Reza Mosalmani
In this work, the stress-driven method (SDM) was used to investigate the axisymmetric nonlinear vibrational behavior of functionally graded circular nanoplates and the results were compared with those of strain gradient theory (SGT). The governing equations and related boundary conditions were derived using Hamilton’s principle based on the SDM and SGT. Then, the governing equations and related boundary
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A semianalytical approach for the variational asymptotic sectional analysis of a beam with high values of initial twist and curvatures J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-04-18 Ali Siami, Fred Nitzsche
The paper presents a semianalytical method including a perturbation solution combined with a numerical method for solving the set of nonlinear equations associated to the two-dimensional Timoshenko beam cross-sectional analysis. The common solution for this problem included in the variational asymptotic beam sectional analysis (VABS) package is based on an analytical perturbation method. The analytical
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Stiffness characteristics of elastic thin plates equipped with precision instruments J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-04-18 Weipeng Hu, Zhengqi Han, Hao Zhou, Denan Qi, Fan Zhang
The stiffness study of the electronic components and thin plate coupling system in spacecraft is a key factor in understanding the mechanical properties and vibration characteristics of such composite structures. A simplified model of an elastic circular plate system with peripheral fixations was established for the circular plate composite structure carrying cylindrical electronic components in spacecraft
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Uniformity of stresses within an elliptical inhomogeneity coated by an interphase layer with eigenstrains J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-04-18 Xu Wang, Peter Schiavone
We study the state of stress inside an elliptical elastic inhomogeneity which is bonded to an infinite matrix through an intermediate confocal interphase layer undergoing uniform in-plane eigenstrains. A simple condition is found that ensures that the internal stress state is uniform but in general nonhydrostatic. This condition can be considered as a restriction on the imposed eigenstrains for given
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Discontinuity-induced mixed mode oscillations for the nonsmooth Murali–Lakshmanan–Chua circuit J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-04-18 Yue Yu, Weinan Zhu, Wenyao Zhou, Zhenyu Chen
We present a detailed investigation into the occurrence of complex patterns in the memristive Murali–Lakshmanan–Chua (MLC) circuit system. The nonsmooth system is divided into fast and slow subsystems by assuming a cosinusoidal function as a slow variable. The determination of the region of bifurcation space in the fast subsystem (the FS) is associated with nonsmooth boundaries and switching manifolds
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Residual stress and strain energy in composites induced by transformed coated circular inhomogeneities J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-03-24 Marinos A. Kattis, Elli Gkouti
The residual stress and strain energy in coated fiber composites induced by a transformation strain in the fiber coatings are theoretically studied. The relative analysis utilizes a simplified elasticity model consisting of a coated circular inhomogeneity embedded in an unbounded matrix, with the coating undergoing a uniform stress-free transformation strain. The distribution of the residual stress
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Thermal shock cracking in thin plate specimens using a gradient damage model J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-03-24 Marwa Dhahri, Radhi Abdelmoula, Jia Li, Yamen Maalej
We present a numerical model to simulate the damage and fracture process occurred in ceramic materials under thermal shock conditions. In particular, the variational principle is applied to gradient damage analysis in the establishment of the numerical model. The experiments on quenching tests of circular specimens are used to validate the efficiency of the model, proving that the proposed model is
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Phase field simulation of the inclusion instability and splitting processes in interconnects due to interface diffusion induced by electromigration J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-03-24 Linyong Zhou, Peizhen Huang, Jiaming Zhang
Based on the bulk free energy density and the degenerate mobility constructed by the quartic double-well potential function, a phase field model is established to simulate the evolution of inclusions in interconnects due to interface diffusion in an electric field. The corresponding phase field governing equations are derived and the reliability of the program is proved by the agreement between the
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Vibrations of nonuniform bidirectional functionally graded nanotubes based on the refined beam theory in a thermal environment J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-03-24 Nikola Despenić, Goran Janevski, Ivan Pavlović
We investigate a model of a nonuniform bidirectional functionally graded (BDFG) nanotube, based on refined beam theory in the framework of nonlocal strain gradient theory. Material properties change smoothly in the radial and axial direction of the nanotube, based on the power-law distribution. We obtain equations of motion by using Hamilton’s principle, and eigenvalues through Galerkin’s method. We
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Thermal convection in rapid 3D extension of a planar crack J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-03-24 Louis M. Brock
An unbounded, isotropic thermoelastic solid contains a closed, semi-infinite planar crack. Point forces are applied to the crack faces and translated toward the crack edge at a constant, subcritical speed. Fracture occurs and extension of the crack is accompanied by thermal convection. A dynamic steady state ensues in which the crack edge profile is no longer rectilinear, fixed and translates at the
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Cosserat micropolar elasticity: classical Eringen vs. dislocation form J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-03-24 Ionel-Dumitrel Ghiba, Gianluca Rizzi, Angela Madeo, Patrizio Neff
We give a comparative presentation of the linear isotropic Cosserat elastic model from two perspectives: the classical Mindlin–Eringen–Nowacki description in terms of a microrotation vector and a new formulation in terms of a skew-symmetric matrix and a curvature energy in dislocation form. We provide the reader with an alternative representation of the energy for the isotropic Cosserat model to ease
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A study on the contact problem of a layer consisting of functionally graded material (FGM) in the presence of body force J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-03-24 Gökhan Adıyaman, Erdal Öner, Murat Yaylacı, Ahmet Birinci
One of the most important components of the early design process for layered systems is gaining a knowledge of the behavior of materials under varied contact situations. Functionally graded materials (FGMs) have grown in popularity in layered systems as a result of their numerous benefits, such as permitting the reduction of local stress concentrations and thermal stresses often experienced in traditional
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Analysis of multiple plastic stress singularities for antiplane V-notches in hardening materials by using the interpolating matrix method J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-02-22 Renyu Ge, Zongjun Hu
Here, an efficient method is given to determine higher-order plastic stress singularities of general antiplane V-notches in a power-law hardening material. Owing to strong stress singularity, the notch tip regions arise in plastic deformation. First, the asymptotic displacement field in terms of radial coordinate at the notch tip is adopted. By introducing the displacement expressions into the fundamental
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Unified original and iteration minimum energy bounds on longitudinal-transverse elastic constants of transversely isotropic unidirectional composites J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-02-22 Duc-Chinh Pham
We study the macroscopic (effective) longitudinal-transverse elastic constants appearing in the mixed longitudinal transverse-bulk stress-strain modes of the unidirectional multicomponent materials that are microscopically and macroscopically isotropic in the transverse plane. Unified systems of original minimum energy and iteration bounds on all 6 effective longitudinal-transverse elastic constants
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Particle swarm optimization for curved beams in multistable structures J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-02-22 Sheng Sang, Ziping Wang, Jiadi Fan
Bistable curved beam structures have been widely used in energy harvesting devices, switches and metamaterials. Traditional bistable curved beams possess constant thickness along their longitudinal directions. To achieve better performance, the optimization of beams with varying thickness is highly demanded. However, due to the complexity of the problem, less attention has been paid to this topic.
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An interface crack in piezoelectric bimaterial with one electrically conductive and two electrically permeable zones at its faces J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-02-22 Volodymyr Govorukha, Marc Kamlah, Shuo Zhao
A mode III partially electroded interface crack between two different piezoelectric materials under the action of antiplane mechanical and in-plane electric loadings is analyzed. From the point of view of the boundary conditions on the crack faces, one zone of the crack faces in such crack can be considered as electrically conductive while the other parts are electrically permeable. Using special representations
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A new element-free Galerkin method for 3D elasticity problems J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-02-22 Zhijuan Meng, Yanan Fang, Xiaofei Chi, Lidong Ma
A new element-free Galerkin (NEFG) method for three-dimensional (3D) elasticity problems is proposed, which reduces the dimension of the 3D elasticity problem along the splitting direction. The 3D problem domain is reduced to a set of two-dimensional (2D) domains by arbitrarily choosing one axis as the splitting direction. The equilibrium equations of two groups of 3D elastic problems are chosen arbitrarily
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A three-phase anisotropic elastic elliptical inhomogeneity with internal linear stress and strain distributions J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-02-22 Xu Wang, Peter Schiavone
We use the Stroh sextic formalism to examine the internal elastic field of stresses and strains inside an anisotropic elastic elliptical inhomogeneity which is bonded to an infinite anisotropic elastic matrix through an intermediate isotropic elastic interphase layer with two confocal elliptical interfaces when the matrix is subjected to nonuniform remote stresses and strains assumed to be linear functions
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Investigation of stress-strain state of an incompressible elliptic cylinder with a hole J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-02-18 Natela Zirakashvili
The paper studies the elastic equilibrium of a homogeneous isotropic incompressible elliptic cylinder with a hole, when normal or tangential stresses are applied on its internal and external surfaces. The cylinder is in a state of plane deformation. Thus, the boundary value problems are set and solved for an incompressible confocal elliptic ring in an elliptic coordinate system. The boundary value
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A new approach for rubber numerical modeling under biaxial testing conditions thorough finite element simulation J. Mech. Mater. Struct. (IF 0.9) Pub Date : 2023-02-18 Debora Francisco Lalo, Marcelo Greco
The framework of this study is to develop a methodology based on digital image correlation (DIC) applied in biaxial straining under large deformations to calibrate the rubber computational modeling by the finite element method (FEM). Since the material approaches incompressibility, different shape functions were adopted to describe the fields of pressure and displacements according to the finite element