Showing papers in "International Journal of Solids and Structures in 2020"

TL;DR: In this paper, a new type of 3D truss-lattice structures for low-frequency and broadband elastic wave absorption is proposed, where the cross-struts in each unit-cell have a radius jump discontinuity.

TL;DR: In this paper, a broadband flexural wave cloak is designed and fabricated by the coordinate transformation method and active control system, which consists of 16 alternative concentric layers with the polydimethylsiloxane (PDMS) and piezoelectric (PZT) patches which are connected with the active control systems.

TL;DR: In this article, the results of 124 pure Mode I fracture toughness tests on two types of anisotropic rocks, the metamorphic Grimsel Granite and the sedimentary Mont Terri Opalinus Clay, were compared to the predictions of three well-known crack growth criteria: the maximum tangential stress (MTS), the maximum energy release rate (MERR), and the minimum strain energy density (MSED).

TL;DR: In this paper, a reverse algorithm was proposed to analyze the structural properties of nanoindentation results of a sintered silver nanoparticle (AgNP) in finite element simulations.

TL;DR: In this paper, the authors investigated the complex band structure and forced response of flexural waves propagating in an elastic metamaterial thick plate with attached spring-mass resonators.

TL;DR: In this paper, the authors present an analytical modeling framework and its analysis for thin piezoelectric metamaterial plates to enable and predict low-frequency bandgap formation in finite structural configurations with specified boundary conditions.

TL;DR: In this paper, a two-dimensional solid structure with embedded inertial amplification mechanisms that shows an ultrawide stop band (band gap) at low frequencies was designed and the compliant hinge connections were designed to achieve the maximum possible stop band width.

TL;DR: In this article, the role of temperature and strain rate in the mechanical behavior of polyether-ether-ketone (PEEK) was investigated. And a constitutive model was proposed to explain the experimental observations by means of entropic strain hardening due to reorientation of polymer chains influenced by thermo-viscoelastic effects.

TL;DR: In this article, 3D DEM is used to guide the specific grain-level definition of F, the formulation of its continuum evolution equation and its effect on anisotropic dilatancy within ACST.

TL;DR: In this article, the as-manufactured characteristics of these cellular materials were investigated via X-ray tomography and microstructural inspection, in order to assess its predictive accuracy and sensitivity to key modelling decisions.

TL;DR: In this paper, an asymmetric version of edge notch disc bend (ENDB) was proposed to assess mixed-mode I+III fracture toughness, which is designed and developed for introducing opening-in-plane-shear sliding mode.

TL;DR: The fractional finite element model (f-FEM) is used to study the nonlocal response of a Euler-Bernoulli beam subjected to various loading and boundary conditions and gives rise to a self-adjoint and positive-definite system accepting a unique solution.

TL;DR: In this paper, an extended Cosserat model that accounts for the coupling between stretching deformations and the micro-rotation is introduced, and the consequences of this chirality are then explicated with the aid of numerical examples.

TL;DR: In this article, the authors explored the texture based on isostatic lines, which is bio-inspired to obtain a high strength composite and the pantographic pattern, which enables considerable displacement with very low resistance.

TL;DR: In this article, an extensive dataset of two-phase microstructures with wide-ranging morphological features is used to assess the relationship between microstructure and effective transport properties, which are computed using Fourier-based methods on digital images.

TL;DR: In this paper, a computational homogenization method to determine the effective parameters of Mindlin's Strain Gradient Elasticity (SGE) model from a local heterogeneous Cauchy linear material is developed.

TL;DR: In this article, an improved distortional plasticity framework that describes the anisotropic hardening occurring during strain path changes, such as the Bauschinger and crossloading effects, is developed.

TL;DR: In this paper, a seismic metamaterial based on a Matryoshka-like structure is designed and the dispersion curves and transmission are simulated by using finite element method.

TL;DR: In this paper, a phase-field model for brittle fracture in polydisperse elastomer networks is proposed, where the authors employ a mixed displacement-pressure formulation for the discretization of the incompressible large deformation elastic problem.

TL;DR: In this paper, the mesoscopically-based framework was proposed to interpret both hardening and softening mechanisms of dense granular assemblies. But the authors focused on mesoscopic evolutions of the densities of granular assembly during a typical drained biaxial test conducted by DEM.

TL;DR: In this article, a model of dislocation pattern formation in crystal plasticity at finite deformation is presented, where the dislocation microstructures are decoupled from deformation micro-structures, and emerge without any consideration of latent hardening or constitutive assumptions related to cross-slip.

TL;DR: It is shown that it is possible to model in a consistent way the crack pattern and the associated mechanism induced by applied settlements starting from a proper treatment of unilateral contact constraints between contiguous blocks, in which the structure is partitioned after the onset of settlements.

TL;DR: In this article, the effects of the initial stresses on the tunable propagation behavior in nonlinear phononic crystal and elastic wave metamaterial are considered for both in-plane and anti-plane modes.

TL;DR: In this article, the axial splitting and curling behavior of circular sandwich metal tubes with metal foam core is investigated analytically and experimentally The sandwich tubes split axially and the strips curl outward by prefabricated cracks at the distal end of the specimens.

TL;DR: Based on the nonlocal theory, three-dimensional buckling of composite nanoplates with coated one-dimensional (1D) quasicrystal (QC) is analyzed in this article.

TL;DR: In this paper, the authors used a cohesive zone approach to ascertain the interplay between fracture process zone size and pattern geometry on the overall work of separation of brittle adhesive joints, and showed that a careful choice of pattern length-scales, which requires a small area fraction of surface pre-treatment, allows to achieve a step-like increase in peel load and absorbed energy in otherwise brittle adhesives.

TL;DR: In this paper, a constitutive model is developed within the frameworks of Bounding Surface plasticity and Anisotropic Critical State Theory in multiaxial stress space, where the main new constitutive ingredient is a fabric anisotropy variable A, a scalar measure of the relative orientation between an evolving fabric tensor F and the deviatoric plastic strain rate direction.

TL;DR: In this paper, a general prescription for designing auxetic lattice structures with high stiffness and controllable isotropic/anisotropic elastic properties is proposed based on it, and a tree-like re-entrant structure is investigated.

TL;DR: In this article, 1D multistable cylindrical metastructures composed of a periodic arrangement of bistable snapping units with programmable nonlinear mechanical responses are presented.

TL;DR: In this article, a new stress invariant based ductile fracture criterion was developed by introducing a stress triaxiality and normalized third invariant dependent function h(η, ξ) and further extended to an anisotropic form through the linear transformation of stress tensor.