Showing papers in "International Journal of Solids and Structures in 1998"

TL;DR: In this paper, the static and dynamic response of the functionally graded material (fgm) plates are investigated by varying the volume fraction of the ceramic and metallic constituents using a simple power law distribution.

TL;DR: In this article, a nonlinear evolution law for finite deformation viscoelasticity was proposed, which is not restricted to states close to the thermodynamic equilibrium, and upon appropriate linearization, it can recover several established models of finite linear viscoels and linear velocities.

TL;DR: In this article, a constitutive damage model for massive concrete is presented, mainly intended for the seismic analysis of gravity and arch dams, and an extension to account for the concrete strain-rate dependency, suitable for seismic analysis, is presented at the end.

TL;DR: In this paper, the authors analyzed nonlocal constitutive models used in simulations of damage and fracture processes of quasibrittle materials and found that some of them inevitably lead to residual stresses even at very late stages of the deformation process and, consequently, they are not capable of modeling complete separation in a widely open macroscopic crack.

TL;DR: In this paper, improved theoretical solutions for adhesively bonded single and double-lap joints are proposed, and the improved solutions provide a better prediction for the adhesive shear distributions and maximum values, particularly in the case of fiber composite adherends.

TL;DR: In this paper, a methodology is presented to predict the displacements of flat unsymmetric epoxy-matrix composite laminates as they are cooled from their elevated cure temperature.

TL;DR: In this article, a meso-scale random field of stiffness and compliance with locally isotropic realizations is introduced to bound the material response from above and from below, and the first and second-order characteristics of these two mesoscale random fields for antiplane elastic response of random matrix-inclusion composites over a wide range of contrasts and aspect ratios are studied.

TL;DR: In this article, the relationship between indentation parameters and true stress/plastic-strain ( σ 1 - e p ) curve was performed for a range of material properties.

TL;DR: In this paper, the Cattaneo problem is considered for a general plane contact between elastically similar materials, i.e., a monotonically increasing tangential load, starting from zero, with normal loading held fixed.

TL;DR: In this article, a general thermomechanical theory of martensitic phase transformations (PT) in inelastic materials is presented and the results are derived for small and large strains in the reference and actual configurations.

TL;DR: In this article, the authors derived the energy release rate for an elliptical cylinder cavity or a crack inside an infinite piezoelectric medium under combined mechanical-electrical loadings via the Stroh formalism and well confirmed by finite element analysis.

TL;DR: In this paper, a finite element method was used to predict the indentation hardness of metals based on the size of the indent, for indents in the size range of 0.1-10 μm.

TL;DR: In this paper, a new domain integrals for extracting mixed-mode stress intensity factors along curved, three-dimensional bimaterial interface cracks are derived, where the auxiliary fields are not asymptotically close to the crack tip.

TL;DR: In this paper, the in-plane compressive response and crushing of a polycarbonate honeycomb with circular close-packed cells is studied through combined experimental and analytical efforts, which is characterized by a relatively sharp rise to a load maximum followed by a drop down to an extended load plateau which is then terminated by a sharp rise in load.

TL;DR: In this paper, it is shown that the macroscale field equations derived from mixture theories can be reformulated in terms of the measurable quantities involved in the macro-scale theories, including the fundamental inequality obtained from the second law, entail the existence of a macroscale C-potential upon which a thermo- dynamically consistent formulation of the constitutive equations can be firmly founded.

TL;DR: In this article, the buckling behavior of sandwich panels with a core that is flexible in the out-of-plane direction, also denoted as soft core including high-order effects, is presented.

TL;DR: In this paper, a spin tensor is defined to be associated with the rotation and deformation of a deforming material body in an arbitrary manner indicated by Ω* = Y(B, D, W), where B and D and W are the left Cauchy Green tensor and the vorticity tensor, respectively.

TL;DR: In this paper, closed-form solutions for the pore pressures and stress fields for the inclined borehole and the cylinder, induced by boundary stress perturbation in an anisotropic poroelastic medium are presented.

TL;DR: In this article, an analytical solution is given for the class of problems of an elastic half plane with a circular cavity, loaded on the cavity boundary, using complex variables, with a conformal mapping onto a circular ring.

TL;DR: In this paper, the authors used an anisotropic strain-gradient elasticity theory with surface energy to solve the mode-I crack problem and derived the solution of the problem by applying the Fourier transform technique and the theory of dual integral and Fredholm integral equations.

TL;DR: In this paper, it is shown that the inclusion of fluid-viscosity and micropolar grain rotations both in the saturated and in the non-saturated case leads to a regularization of the shear band problem.

TL;DR: In this article, a model of chemical and mechanical degradation of underground cement-based structures is presented, where the chemical attack kinetics follow a non-linear diffusion equation based on the mass conservation of the calcium ions in concrete and the mechanical behaviour is modelled according to a scalar damage constitutive relation.

TL;DR: In this article, a method has been proposed to determine the stress-strain curve of hard materials from ultra-low-load indentation tests using geometrically similar indenters.

TL;DR: In this article, the authors explored the effects of thermo-chemo-mechanical cross-effects from the macro-scale of engineering material modeling to the level of structural design.

TL;DR: In this article, a constitutive framework of large-strain elastoplasticity in both the Lagrangian and the Eulerian geometric setting is presented, which takes into account anisotropic material response.

TL;DR: In this paper, the analysis of sound propagation in a porous medium is performed using an homogenization technique, and the results show that new porous materials could be evolved by introducing a microporosity structure that would give enhanced absorption properties over a wide range of frequencies.

TL;DR: In this article, a systematic method of obtaining the effective viscoelastic moduli in time and frequency domain is presented for composites with periodic microstructures, where the problem of estimating the effective moduli is formulated using the asymptotic homogenization method.

TL;DR: In this article, the authors presented closed-form penetration equations for rigid, spherical-nosed rods that penetrate 6061-T651 aluminum targets using the spherical cavity-expansion approximation and constitutive equations for the target that include strain hardening and strain-rate sensitivity.

TL;DR: In this paper, the authors presented the correct decomposition of three-dimensional stress and displacement fields for decoupling the mixed mode J-integral into mode I, II and III.

TL;DR: In this paper, an exact stiffness formalism is presented to study harmonic and transient wave propagation in multilayered dry, saturated and unsaturated isotropic poroelastic media.