Showing papers in "International Journal of Engineering Science in 1980"

TL;DR: In this paper, the use of the thermodynamics of mixtures to formulate incompressible porous media models is discussed. But the model is restricted to the case where the mixture is a mixture where the solid and the fluid constituents are each incompressibly.

TL;DR: In this article, an extension of Biot's theory into the nonlinear anelastic range is presented, which is necessary in order to analyze the transient response of soil deposits, and has acquired considerable importance in recent years due to increased concern with the dynamic behavior of saturated soil deposits and associated liquifaction of saturated sand deposits under seismic loading conditions.

TL;DR: In this paper, the macroscopic dynamical behavior of a porous elastic medium the cavities of which are filled with a Navier-Stokes liquid can be described with equations obtained from certain assumptions and the homogenization method, based on the use of periodic solutions of space variables.

TL;DR: In this paper, the similarity solutions of a strong shock wave propagation in a mixture of a gas and small solid particles have been investigated, and the results depend on three non-dimensional parameters; i.e. the ratio of the specific heats of the gas, the mass concentration of the solid particles in the mixture and the relationship of the density of the densities of the particles to that of the initial density of gas.

TL;DR: Theoretical support for the existence of a boundary layer theory for non-Newtonian fluid of second grade is given in this paper, where it is pointed out that unless certain assumptions are made regarding the flow, assumptions which are not alluded to in earlier work in this area, in addition to the assumptions usually made in the case of the linearly viscous fluid, the theory so developed might have inherent flaws.

TL;DR: In this article, the fundamental differential equations of the linear theory of apolar and nonrelativistic, thermopiezoelectricity and also its variational description are presented.

TL;DR: In this paper, the influence of coupled diffusion of heat and moisture on the transient stresses in a composite was investigated analytically where the moisture diffusion coefficient is taken to be temperature dependent while the thermal diffusion coefficient was kept constant.

TL;DR: In this paper, a continuum theory of anisotropic fluids is introduced and balance laws based on micropolar continuum mechanics are established and restricted by the second law of thermodynamics.

TL;DR: In this paper, a boundary value problem of two bonded nonhomogeneous similar planes containing a crack is considered, and the original problem is reduced to a singular integral equation with a weakly singular kernel.

TL;DR: In this paper, the authors present phenomenological arguments leading to coupled equations governing simultaneous diffusion of moisture and heat in a solid, including the heat of transport associated with the Dufour effect.

TL;DR: In this article, a penny-shaped rigid inclusion embedded in bonded contact with a transversely isotropic elastic medium is investigated, and the asymmetric displacements of the rigid circular inclusion correspond to a rotation about a diametral axis and an in-plane lateral translation.

TL;DR: In this paper, an elastic layer that rests on a substrate and is subjected to a concentrated normal force is used to investigate some aspects of frictional slip between two bodies, and the formulation using known results for glide dislocations leads to a singular integral equation of a Cauchy type that must be solved numerically.

TL;DR: In this paper, a 4-dimensional defect dynamics model is presented, which admits a 45-fold gauge group and a system of natural gauge conditions whereby the elastic and the plastic parts of the responses may be disentangled.

TL;DR: In this article, the elastic layer that is pressed uniformly against a half space and is subsequently subjected to a concentrated force tending to induce slip and separation between the bodies is treated, based on known results for discrete dislocations.

TL;DR: In this article, a combined analytical and finite-element solution method is developed for the analysis of tension cracks in brittle solids, which is specially suited to problems of this kind.

TL;DR: In this article, a modeling of the effective anisotropic elasticity tensor is presented for elastic rocks permeated by a rather dilute concentration of stress-induced dry and saturated flat cracks.

TL;DR: In this article, a set of boundary layer equations for the flow of an incompressible, constant density micropolar fluid in the vicinity of a two dimensional stagnation point is formulated.

TL;DR: In this article, the effect of thermal diffusion on the convective stability of a two component fluid in a porous medium has been investigated by the linear theory using normal mode technique, and the results are presented in terms of a parameter called the Soret parameter for a system bounded by rigid boundaries.

TL;DR: In this article, an exact solution for stresses which are produced in an infinite plate with two unequal circular holes by a uniform tension, an internal pressure or uniform shearing forces along a hole Bipolar coordinates are used in the solution.

TL;DR: In this paper, it was found that the existing dislocation hardening mechanisms can be generally classified into two categories: isotropic and kinematic This classification leads to the concept of "degree of isotropy" in work hardening based on which the cyclic stress-strain relations of single crystals and metals are constructed throughout the entire loading history.

TL;DR: In this paper, free eddies are shown to exist for certain locations of the rotelet inside the cylinder, and a roteel interior to a cylinder which is either fixed or rotating is discussed.

TL;DR: In this paper, the authors considered the problem of flow in media with double porosity (e.g. fissured rocks) by utilizing the author's concept of multiporosity and employing the apparatus of continuum theory of mixtures.

TL;DR: In this paper, the effect of nonhomogeneity on the stress distribution under the punch and the stress singularity is studied, and the influence of Poisson's ratio on the results is also considered.

TL;DR: In this article, a class of rigid punch problems for an incompressible linearly elastic body involving forces and moments is considered by the theory of variational inequalities, and extensive discussions about the reduced constraint of incompressibility in the finite element approximation are given.

TL;DR: In this paper, a flat rubber membrane of variable thickness is stretched in its plane and then inflated over a circular frame, which enables the thickness profile and inflation pressure to be determined in order that the inflated membrane is a paraboloid of revolution.

TL;DR: In this article, the problem of scattering of plane compressional wave by an elastic sphere embedded in an isotropic elastic medium of different material properties is solved, and approximate formulas are derived for the displacement field, stress tensor, stress intensity factors, far-field amplitudes and the scattering cross-section.

TL;DR: A solution of the contact problem for an initially stressed neo-Hookean infinite layer is obtained in this paper, where the layer is assumed to be bonded to a rigid foundation and the punch is taken to be axisymmetric and in particular, the conical and cylindrical shapes of the punch are considered in detail.

TL;DR: In this paper, general circle theorems which localize the complex eigenfrequencies arising in the linear stability analysis of conservative steady flows are given, and Howard's circle theorem for incompressible plane parallel flow is contained as a special case.

TL;DR: In this article, the authors considered thermal instability in a heat conducting micropolar fluid layer under the influence of a transverse magnetic field and solved the eigenvalue problem using finite-difference and Wilkinson's iteration techniques.