Showing papers in "International Journal of Solids and Structures in 1992"

TL;DR: In this paper, two elastic plane strain problems relevant to the cracking of a thin film bonded to a dissimilar semi-infinite substrate material are investigated. But the results of these problems are limited to the case where the crack tip is within the film.

TL;DR: In this paper, the elastic contact problem of a rigid cylindrical punch indenting a multi-layered linear elastic half space is studied and then used to model the unloading phase of a microindentation test of thin fims deposited on a substrate.

TL;DR: In this paper, a fracture mechanics analysis is developed within the realm of two-dimensional linear piezoelectricity, and asymptotic expressions for the electromechanical fields in the vicinity of the crack are deduced, and their behavior is illustrated through several examples.

TL;DR: In this paper, a new model of the progressive crushing of circular tubes was developed in which an active zone of plastic deformations contains two folds or buckles, and closed-form solutions were derived for the length of the plastic folding wave and the mean crushing force.

TL;DR: In this paper, a systematic analysis for commonly used fracture specimens to investigate the role of material orthotropy in fracture behavior of unidirectional composites is conducted, which significantly reduces the complexities involved in both experimental investigation and theoretical modelling.

TL;DR: In this article, the Green's function technique is used to develop a solution for an infinite, piezoelectric medium containing a ellipsoidal inclusion and the coupled elastic and electric fields inside the inclusion stay uniform when the external elastic field and electric field are constant.

TL;DR: In this article, the authors examined cracks in thin films caused by residual tension and showed that the critical film thickness needed to avoid cracking is lower if the crack extends into the substrate.

TL;DR: In this paper, the authors established the general form of the expansion of the stress intensity factors in powers of the crack extension length, for a crack propagating in a two-dimensional body along an arbitrary kinked and curved path.

TL;DR: In this article, an effective computational method, based on an interaction integral, was introduced to evaluate elastic T -stress along three-dimensional crack fronts. But this method is limited to the case of edge-cracked and surface-flawed plates.

TL;DR: In this article, the response of woven Kevlar/polyester laminates to quasi-static and dynamic penetration by cylindro-conical projectiles with an apex of primarily 60° has been investigated.

TL;DR: In this article, a Rayleigh-Ritz procedure was used to discretize the problem and the resultant non-linear equations were solved iteratively using Newton's method, and the predicted response was found to be in very good agreement with the experimental result.

TL;DR: In this article, the response and various instabilities which govern the behavior of circular cylindrical shells under pure bending were investigated and the results showed that the structural response and inherent instabilities are strongly influenced by the plastic characteristics of the material.

TL;DR: In this paper, a micromechanically based continuum damage model for carbon black filled elastomers exhibiting Mullin's effect is extended to incorporate viscous response within the framework of a theory of viscoelasticity.

TL;DR: In this article, a smeared-crack model is proposed in which the stress after cracking is not only a function of the crack strain (softening function), but also of crack strain rate.

TL;DR: An analytical representation of the normal impact and perforation of conically-tipped hard-steel cylinders with an aspect ratio of three on laminated Kevlar 29/poIyester targets was developed to accompany corresponding text information.

TL;DR: In this article, a mathematical formulation for the description of the average mechanical properties of structural masonry is presented, based on the framework recently outlined by Pietruszczak (1991).

TL;DR: In this paper, a closed-form solution for the case of a far-field antiplane mechanical load and a farfield inplane electrical load was obtained for a circular inclusion embedded in an infinite piezoelectric matrix.

TL;DR: In this article, two types of test specimen for determining interfacial fracture toughness are calibrated and a zone of K dominance is shown to exist for the specimens calibrated, provided the zone of nonlinear effects is small.

TL;DR: A unit cell problem governing effective mechanical properties and local stress concentrations for composites with periodic micro-structure and nonlinear constituents has been derived by employing an asymptotic expansion of the field variables in two length-scales as discussed by the authors.

TL;DR: In this article, the authors present an explicit expression for the energy of a two-phase nonlinear composite matrix with rigid inclusions and cavities for which the energy density function of the matrix is arbitrary and the microgeometry of the composite appears through an expression which bounds the energy.

TL;DR: In this paper, a new refined hut simple shear deformation theory of elastic shells is developed for shells laminated of orthotropic layers and the boundary value problem is formulated by making use of the principle of virtual power in conjunction with the assumed consistent displacement field.

TL;DR: The formulation of the microplane model has been modified to rationalise the structure of the basic hypotheses, simplify the equations and generalise the concepts whenever possible, resulting in a new formulation which gives a much better numerical efficiency for code implementation while keeping the same desirable features and accuracy in experimental data fitting.

TL;DR: In this article, the effect of porosity upon indentation resistance is explored for a sticking conical indenter, and two material models are used: the Gurson model which is appropriate for lower porosities, where there are well separated voids that are roughly spherical in shape, and the particle yield model of Fleck et al.

TL;DR: In this paper, a method of modeling material damping and modulus in structural dynamics analysis is presented, based on the use of augmenting thermodynamic fields (ATF) to interact with the mechanical displacement field of continuum mechanics.

TL;DR: In this article, a perturbation analysis valid for the second order accuracy in the deviation of the crack surfaces from a straight line is presented, based on complex variable representations in the Stroh formalism and known solutions for a perfectly straight reference crack.

TL;DR: In this article, the authors developed analytical models that predicted forces and penetration depths for long, rigid rods with ogival noses and rate-independent, strain-hardening targets.

TL;DR: In this article, the variational statement, governing equations and corresponding Ritz approximations are derived in Cartesian, cylindrical and spherical coordinates for the evaluation of the natural frequencies of free vibrations of elastic cylinders and spheres.

TL;DR: In this article, a beam model is used to model a thin film segment bonded to an elastic half space, and a cohesive zone model is employed to determine the cohesive zone size at a given value of the yield stress.

TL;DR: In this paper, the granular material perceived as a collection of particles is modelled as a micropolar continua taking account of particle interaction and microstructure of the material, and explicit expressions of constitutive constants in terms of elastic interparticle stiffness are derived for granular solids with Isotropie random fabric distribution.

TL;DR: In this article, the Boundary Element Method is combined with the method of compatible deformations to analyse the stress distributions in cracked finite sheets symmetrically reinforced by bonded patches and stiffeners.