Showing papers in "International Journal of Solids and Structures in 1989"

TL;DR: In this article, a constitutive model based on an internal variable-formulation of plasticity theory for the non-linear analysis of concrete is presented, which uses a new yield criterion which matches experimental data quite well and it accounts for both elastic and plastic stiffness degradations effects.

TL;DR: In this paper, the authors examined the competition between deflection and penetration when the materials on either side of the interface are elastic and isotropic and determined the range of interface toughness relative to bulk material toughness which ensures that cracks will be deflected into the interface.

TL;DR: In this paper, an energy-based coupled elastoplastic damage theory for ductile and brittle materials is presented, which employs irreversible thermodynamics and internal state variable theory for damage.

TL;DR: In this paper, an exact formulation of this model is presented by deriving a translation rule of the center of similarity and a consistency condition for the subloading surface and by examining the physical meaning of the loading criterion in terms of a strain rate and the associated flow rule concurrently for materials with an anisotropic hardening/softening and without an clastic domain.

TL;DR: In this article, a crack in a brittle substrate parallel to the film/substrate interface is considered and the critical combination of residual stress and film thickness below which steady-state substrate cracking is avoided can be inferred provided the substrate toughness is known.

TL;DR: In this paper, the authors analyzed the interactions between singularities and interface cracks and derived the complete solutions and stress intensity factors for two important interface crack configurations, including point force, point moment, edge dislocation and transformation strain spot.

TL;DR: In this paper, the influence of shape and size distribution of defects on material strength is investigated and a very general analytical expression for the tensile strength decrease with size is obtained and then confirmed by experimental evidence.

TL;DR: Based on detailed three-dimensional finite clement analysis, the near-tip field of a thin elastic plate remotely subjected to Mode II antisymmctrical loading is investigated in this article.

TL;DR: In this article, a thermoplastic theory of fluid-filled porous materials is established, which incorporates the heat transportation by fluid flow through pores in addition to the difference between the thermal expansibility of the pore fluid and that of the solid skeleton.

TL;DR: In this article, the uniqueness of the solutions of a class of initial-boundary value problems in linear, isotropic, homogeneous, nonlocal elasticity was proved based on the positive definiteness of total strain energy.

TL;DR: In this article, the authors introduced a new derivation rule by means of which two new stress rates are defined. And they compared five stress rates: Jaumann's, Truesdell's, Green-Naghdi's, Sowerby-Chu's and Durban-Baruch's for simple shear.

TL;DR: In this article, the shear-lag model is applied to a monolayer, unidirectional, fiber-reinforced composite loaded in tension, and the time dependence of the effective load transfer length is calculated.

TL;DR: In this paper, the antiplane strain problem of two dissimilar anisotropic composite wedges of arbitrary angles that are bonded together along a common edge is considered and the dependence of the order of the stress singularity on the wedge angles and material constants is studied.

TL;DR: In this paper, a direct tension test on concrete specimens is analyzed using finite elements and it is shown that the behavior after peak load is strongly non-homogeneous and involves asymmetric crack propagation.

TL;DR: In this paper, the region surrounding an advancing crack tip is modeled as a zone which has undergone a uniform dilatational phase transformation, and the region is allowed to evolve around the advancing tip under conditions of increasing far-field load while the tip is maintained at a critical stress intensity necessary for fracture.

TL;DR: In this paper, a nonlinear model of frictional anisotropy is formulated and a linear model of anisotropic dry friction is completed with properties about principal directions of friction and friction symmetries.

TL;DR: In this article, the main features of contact problems of elastic beams are explored by considering a specific equilibrium problem of a beam in contact with a smooth rigid flat surface, and solutions of four separate linear theories, namely a general theory (G) and three others which are constructed as constrained theories are considered.

TL;DR: In this paper, a bifurcation problem for a solid sphere subjected to uniform tensile deadloading p 0 at its boundary is examined within the framework of finite elastostatics.

TL;DR: In this article, the sensitivity analysis of axisymmetric elastic media is formulated using boundary elements and kernels for sensitivity matrices are obtained through implicit differentiation of the corresponding boundary element elasticity kernels.

TL;DR: In this paper, a finite element method is developed for obtaining solutions to the free damped vibrations of plates and shells made of laminated fiber-reinforced, organic-matrix composites.

TL;DR: In this article, a void-sheet consisting of a row of circular cylindrical voids is analyzed, taking full account of the interaction between neighbouring voids, and it is found that the additional void growth enforced by such inclusions can have a significant influence on localization predictions.

TL;DR: In this paper, a general and simple method is presented for the determination of stress intensity factors in elasticity problems involving several interacting cracks and complex crack shapes using a superposition scheme and an approximation of certain unknown crack-line tractions by a series of base functions.

TL;DR: In this paper, higher order weight functions for calculating power expansion coefficients of a regular elastic field in a two-dimensional body in the absence of body forces are developed, and the significance of these expansion coefficients in fracture analysis is also discussed.

TL;DR: In this article, boundary integral equations for coupled quasistatic thermoelasticity are derived by starting with existing fundamental solutions along with an appropriate reciprocal theorem, and several numerical examples are provided to illustrate the validity and attractiveness of the boundary element approach for this entire class of problems.

TL;DR: In this article, locally transversely isotropic elastic material can be used in a cylinder configuration in which the material principal direction is helically wound and stress-strain equations are obtained for such a cylinder under axially symmetric loading: axial force, twisting moment and uniform radial internal and external pressure forces.

TL;DR: In this paper, a nonlinear plate theory is employed for the plate segments of the beam, in which the exact nonlinear expressions are used for the middle surface strain measures, but the bending measures are linearized.

TL;DR: In this article, a constitutive model is developed in which a set of continuous field variables, called damage vectors, are used to describe the anisotropic response of a brittle solid due to the growth of cracks under general applied loads.

TL;DR: In this paper, the authors investigated the 3D stress field in the immediate vicinity of a bonded interface and the free edge of a hole in a laminated composite plate, where the laminates are assumed to be of homogeneous and Isotropic materials, but of different elastic properties.

TL;DR: In this paper, the bending theory of laminated plates was used to determine natural frequencies and buckling loads of simply supported angle-ply laminated plate, which allows a parabolic distribution of transverse shear stress through each layer.

TL;DR: In this article, the theoretical foundations of a new analytical model developed for the study of nonlinear interaction of local and overall instabilities of axially compressed stiffened plates are reviewed.