Showing papers in "International Journal of Solids and Structures in 2014"

TL;DR: In this article, a beam-based paradigmatical design was proposed for flexoelectric energy harvesting under harmonic mechanical excitation. And the authors showed that the output power density and conversion efficiency increase significantly when the beam thickness reduces from micro-to nanoscale and flexolectricity-based energy harvesting can be a viable alternative to piezoelectrics.

TL;DR: In this paper, the authors investigated the effect of the shape of the ribbon on its stretchability and compliance through theoretical, numerical, and experimental means, and concluded that in general, the narrower ribbon, the larger arc radius and arc angle, and the longer arm length will yield lower intrinsic strain and effective stiffness.

TL;DR: In this paper, the effect of geometrical imperfections, in the form of random perturbations to the joint positions, is investigated for both stiffness and strength of a rigid, ideally plastic gyroid lattice.

TL;DR: In this paper, the authors presented a mathematical model based on a micromechanical approach to describe the behavior of sand-silt mixtures under both drained and undrained conditions.

TL;DR: In this article, the results of a study of the crushing behavior of open-cell Al foams under impact were presented. But the results were limited to the case of high-speed impacts at velocities in the range of 20 to 160m/s.

TL;DR: In this paper, the size of representative volume element (RVE) for 3D stochastic fibrous media is investigated and a statistical RVE size determination method is applied to a specific model of random microstructure: Poisson fibers.

TL;DR: In this paper, a dynamic X-FEM model is developed in which both Crank-Nicolson and Newmark time integration methods are used for calculating transient responses of thermal and electromechanical fields respectively.

TL;DR: Cheng et al. as discussed by the authors developed and implemented finite element formulation for the asymptotic homogenization theory for periodic composite plate and shell structures, earlier developed in Kalamkarov, 1987, Kalamkinov, 1992, and thus adopts this analytical method for the analysis of periodic inhomogeneous plates and shells with more complicated periodic microstructures.

TL;DR: In this paper, the authors extended the widely adopted Gurson-Tvergaard-Needleman (GTN) model by coupling two damage parameters, representing the volumetric damage (void volume fraction) and the shear damage, respectively, into the yield function and flow potential.

TL;DR: In this paper, a stacked folded core for blast mitigation is proposed. The core consists of an alternating stacked sequence of folded sheets in the double-corrugated pattern, with the stack oriented such that the folding kinematics define the out-of-plane compressive strength of the core.

TL;DR: In this article, the authors examined the effect of material asymmetry on the bending of NiTi tubes in a custom four-point bending facility under rotation control and isothermal conditions.

TL;DR: In this paper, a detailed analysis of the experimental strain distribution measured by digital image correlation is discussed for each test and the applicability of each test for the observation of the material behavior under shear stress with a view to material modeling for finite element simulations.

TL;DR: In this paper, a variational-asymptotic homogenization (VAS) procedure was proposed for the analysis of wave propagation in materials with periodic microstructure.

TL;DR: In this paper, the authors used micromechanically accurate foam models to simulate and study the dynamic crushing of open-cell foams and found that the transition from quasi-static to nearly planar shocks is rather gradual.

TL;DR: In this paper, a peridynamic state-based beam model is proposed to represent the bending of a Kirchhoff-love plate, which is non-ordinary and derived from the concept of a rotational spring between bonds.

TL;DR: In this article, the photo-thermal mechanics of deformation of temperature sensitive hydrogels impregnated with light-absorbing nano-particles are investigated. And a finite element model is developed using a user-defined subroutine in ABAQUS, and by modeling the gel as a hyperelastic material.

TL;DR: In this article, a peridynamic state-based model was developed to represent the bending of an Euler-Bernoulli beam. But this model is non-ordinary and derived from the concept of a rotational spring between bonds.

TL;DR: In this article, an exponential framework for strain energy density functions of elastomers and soft biological tissues is proposed, which is based on a self-contained approach that is different from a guesswork or combination viewpoint.

TL;DR: In this article, a stress gradient elasticity theory is developed which is based on the Eringen method to address nonlocal elasticity by means of differential equations, and the associated boundary-value problem is shown to admit a unique solution characterized by a Hellinger-Reissner type variational principle.

TL;DR: In this paper, a 3D numerical model (RFPA3D) is used to simulate the evolution of cracks in three-dimensional space, as well as the heterogeneity of the rock mass.

TL;DR: In this paper, a quasi-static implementation of peridynamics theory for crystal plasticity simulations is presented, which employs an implicit iterative solution procedure similar to a non-linear finite element implementation.

TL;DR: In this article, a semi-discrete approach for modeling individual fibers in cement-based materials is presented, where fibers can be positioned freely in the computational domain, irrespective of the background lattice representing the matrix phase, and the pre-and post-cracking actions of the fibers are simulated with little computational expense.

TL;DR: In this paper, a spectral approach is developed to solve the elasto-static equations of field dislocation and g-disclination mechanics in periodic media, which is consistent with the pixel grid for the calculation of first and second order spatial derivatives, and compared to the classical discrete approximation of continuous Fourier transforms when deriving elastic fields of defects.

TL;DR: In this paper, a classification of band-gaps in layered phononic crystals is proposed based on the analysis of the eigenvalues of the transfer matrix for a unit-cell and the asymptotics derived for the transmission coefficient.

TL;DR: In this paper, a variational asymptotic analysis of the strain energy in terms of the smallness of a single corrugation with respect to the characteristic length of macroscopic deformation of the corrugated structure was carried out.

TL;DR: In this article, a coupled elastoplastic-damage constitutive model with Lode angle dependent failure criterion for high strain and ballistic applications is presented, which is calibrated for precipitation hardened Inconel 718 nickel-base superalloy.

TL;DR: In this article, the elastic properties of a carbon nanotube (CNT) reinforced composite are affected by many factors such as the CNT-matrix interphase, and without sufficient consideration of these factors can give rise to incorrect predictions.

TL;DR: In this paper, a volume-compensated particle model (VCPM) is proposed for the modeling of deformation and fracture in solids, where two potentials are introduced to model the interactions between material particles, i.e., a local pairwise potential and a non-local multi-body potential.

TL;DR: In this article, a numerical model based on the Multi-Level Multi-Integration technique has been developed to study the adhesion between two surfaces, which provides a self-consistent solution of surface separation and contact pressure throughout an arbitrary surface contact (including random surface roughness) with the adhesive interactions governed by the Lennard-Jones potential.

TL;DR: In this article, a semi-analytical elastic plane strain solution was provided for stress field around a lined non-circular tunnel subjected to uniform ground load, and the solution was validated by ABAQUS finite element software through an example.