Showing papers in "International Journal of Solids and Structures in 1988"

TL;DR: In this article, a boundary value problem simulating a periodic array of spherical voids in an isotropically hardening elastic-viscoplastic matrix is analyzed, showing a shift from a general axisymmetric deformation state to a mode of uniaxial straining at which point the plastic deformation localizes to the ligament between neighboring voids.

TL;DR: In this paper, the effects of the elastic and plastic properties of both the film and substrate on the hardness of the film/substrate composite are studied by determining the average pressure under the indenter as a function of the indentation depth.

TL;DR: In this paper, a simple remedy based on introducing additional higher order terms in the governing equations in the strain-softening portions of the domain is proposed, and the resulting formulation provides solutions which are independent of element size with a finite energy dissipation.

TL;DR: In this article, the authors used the finite element method under the conditions of frictionless and completely adhesive contact and within the context of incremental elasto-plasticity to study the elastic and plastic properties of materials on a sub-micrometer scale.

TL;DR: In this article, a theoretical analysis of the peeling of a thin elastoplastic film bonded on an elastic substrate is presented, where the moment-curvature relation for pure bending of an elastplastic beam under conditions of plane strain is derived and slender beam theory is used to analyze the deformation of the adherend.

TL;DR: In this paper, a simple isoparametric finite element formulation based on a higher-order displacement model for flexure analysis of multilayer symmetric sandwich plates is presented, which accounts for non-linear variation of inplane displacements and constant variation of transverse displacement through the plate thickness.

TL;DR: In this paper, the response and stability of long, relatively thick-walled metal tubes under combined bending and external pressure were studied through combined experimental and numerical efforts, and a suitable formulation of the problem based on the principle of virtual work was used to numerically simulate the experiments.

TL;DR: In this paper, the effect of microcracks on crack growth initiation in brittle solids was investigated with a view to determining the range of dominance of each mechanism, and the extent of shielding of the crack tip by the intervening micro-cracks was estimated under isotropic damage conditions.

TL;DR: In this article, a constitutive model for concrete, built within the framework of rate-independent theory of plasticity, is presented, which invokes the concept of a failure locus which is introduced a priori as a path-independent criterion.

TL;DR: In this paper, the nonlinear differential equations of motion, and boundary conditions, for Euler-Bernoulli beams able to experience flexure along two principal directions (and thus, flexure in any direction in space), torsion and extension are formulated.

TL;DR: In this paper, the authors explore the consequences of supplementing the one-dimensional theory of bars in tension with further constitutive information, which pertains to the surface of strain discontinuity and consists of a "kinetic relation" and a criterion for the initiation of such a surface.

TL;DR: In this article, a modified Stroh formalism for anisotropic elasticity is presented, which is valid regardless of whether N is simple, almost non-semisimple or non-semisimple.

TL;DR: In this article, a plane elastic contact between a thin strip and symmetric rollers is considered, and various loading regimes, including factional sliding, frictionless and frictional indentation, and the effect of applying a tangential force less than that necessary to cause sliding are treated.

TL;DR: In this article, the effects of non-linear inertia and curvature in the analysis of the motion of a beam with a constant distance between supports is assessed, and the nonlinear response of clamped-clamped and clampedpinned beams to a harmonic load of frequency near the undamped natural frequency of the beam is investigated by a perturbation method.

TL;DR: In this paper, the authors examined the transverse shear and bending response and the influence of finite deflections on the behavior of rigid, perfectly plastic clamped beams struck transversely by a mass at any point on the span.

TL;DR: In this paper, an analytical study of both braced and unbraced semi-rigid frames is presented, and it is shown that the use of bracings not only increases the strength and stiffness of the frames, but also reduces the sensitivity of the frame to differences in connection behavior.

TL;DR: In this article, the elasticity problems of a planar crack, lying in an infinite three-dimensional solid, the front of which differs only slightly from a circle, are studied.

TL;DR: Mesomechanics as mentioned in this paper is a new research thrust to evolve non-continuum mechanics for heterogeneous materials, which seeks to apply mechanics principles to the microstructural constituents of multiphase materials, thus placing the microstructure-mechanics relationship on a quantitative basis.

TL;DR: In this paper, the bending of a Winkler foundation is solved by using an original boundary integral equation method involving the fundamental solution for plate flexure problems, and an integral representation for the second member of the equation is given.

TL;DR: In this article, the mixed boundary-value problem of a welded (and smooth) surface footing is reduced to a set of coupled Fredholm integral equations of the first kind and a numerical solution is provided.

TL;DR: In this paper, the problem of determining the displacements and the contact forces for a given constant external loading can be formulated alternatively as a variational inequality, representing the principle of virtual work, or as a set of Kuhn-Tucker relations, representing force equilibrium.

TL;DR: In this paper, an extension of recent analyses for the transverse motion of an elastic plate under a transverse load is given which shows that the problem of the loading of a thin plate is a singular perturbation one.

TL;DR: In this article, the authors investigated the transfer of load across a frictional interface between elastic solids, where a fiber is extracted from or pressed into a half-plane to which it is connected via Coulomb friction.

TL;DR: In this article, the steady-state crack growth in an elastic solid which contains particles that undergo irreversible dilatant transformation is analyzed and the transformation is assumed to be uniform and to be triggered when the mean stress attains a critical value.

TL;DR: In this paper, the non-linear vibration and postbuckling behavior of unsymmetrically laminated cross-ply circular cylindrical shells with clamped and simply-supported ends are studied by a multi-mode approach.

TL;DR: In this paper, a reasonable formulation of the two surface model is given by deriving a mathematical condition which must be satisfied in order that surfaces do not intersect in their relative translation and which will be called a "non-intersection condition" and by proposing a reasonable measure to represent an approaching degree to the normal yield stale.

TL;DR: In this paper, the authors studied the interactive buckling of thin-walled columns having arbitrary cross-sections and developed a new formulation to take into account the simultaneous interaction of the purely flexural and flexural-torsional overall modes of buckling with local buckling.

TL;DR: In this paper, a general discussion of the lateral buckling of uniform and doubly symmetric I beams with web stiffeners and batten plates is presented, where the critical moments derived from the energy method take the same equations as ones for the original I beam when the torsional constant and the moment of inertia about the weak axis of the I beam with the web stiffener and/or batten plate are exchanged for those of the original beam.

TL;DR: In this article, a general constitutive model for concrete is discussed in which the total strain rate is decomposed into elastic, plastic and damage strain rates, and rate equations are formulated for all strain rate portions together with evolution rules for hardening and damage state variables.

TL;DR: In this paper, the effects of various parameters on thermal buckling loads are studied, and the thermal stability problems are solved for a simply-supported rectangular laminate in a state of uniform compressive (or tensile) initial stress plus initial bending stress combined with uniform thermal compressive stress plus thermal bending stress.