Showing papers in "International Journal of Engineering Science in 1983"

TL;DR: A survey of theories of immiscible mixtures can be found in this article, where it is emphasized that the immiscibility of such mixtures has important consequences concerning the forms of the constitutive equations, and that it can also result in the mixtures exhibiting microstructural effects.

TL;DR: In this article, a model for the dynamic perforation of viscoplastic plates by rigid projectiles is presented, which is considered to occur in five continuously coupled but distinct stages.

TL;DR: In this article, a non-local deformation theory for elasto-plastic solids is presented, based on the Levy-von Mises and Prandtl-Reuss theories.

TL;DR: In this paper, the effects of K (permeability parameter) and ω (parameter of frequency) on the velocity field are discussed and an analytical solution for the velocity fields is derived.

TL;DR: In this article, the slow flow of an incompressible viscous fluid is studied in an array of a great number of small fixed solid particles, and it is proved that Brinkman's law occurs really for a critical size of particles; for larger particles the fluid filtration is governed by the Darcy's law and smaller particles do not influence the flow.

TL;DR: In this article, a two-dimensional problem of elastic interaction of a macro-crack with a field of micro-cracks is considered, based on the self-consistent method, generalized with the account of strong non-uniformity of the stress field in the vicinity of the macrocrack.

TL;DR: In this article, the authors generalize the formula derived by Cesaro (1906) within the classical linear theory of elasticity to describe the displacements to within a constant translation and a constant finite rotation.

TL;DR: In this paper, a phenomenological-thermodynamical model for the anomalous behavior of the flow of deformable macromolecules is presented, where the structural deformation is characterized by means of a quantity which may be a scalar, a vector or a tensor, and is considered as a so-called internal variable.

TL;DR: In this article, a similarity analysis of the flow and heat transfer past a continuously moving semi-infinite plate in a micropolar fluid is presented, and the velocity, micro-rotation distribution and the temperature profiles are shown on graphs and the numerical values of the skin friction and the rate of heat transfer are entered in tables.

TL;DR: In this article, the effect of quadratic elastic nonlinearity on the propagation of surface Rayleigh waves on an isotropic elastic solid is examined using the method of multiple scales and an approximate solution is obtained which is uniformly valid in both spatial directions as well as in time.

TL;DR: In this paper, a more general dispersion relation is obtained to determine the effects of rotation, relaxation time and the external magnetic field on the phase velocity of the plane harmonic waves in an infinite conducting thermo-elastic solid permeated by a primary uniform magnetic field when the entire elastic medium is rotating with a uniform angular velocity.

TL;DR: In this article, boundary layer solutions are presented to study the steady state heat transfer from a semi-infinite flat plate to a micropolar fluid, where boundary conditions of isothermal wall, constant surface heat flux and insulated wall with viscous dissipation effects have been treated.

TL;DR: In this article, a nonstationary white noise model of earthquake ground motion is employed and the response of the system is investigated by the generalized method of equivalent linearization, the results are compared with those of the stationary analysis and some estimates for the maximum slip are obtained and discussed.

TL;DR: In this paper, the authors considered the case of partial retention of water in porous medium previously occupied by water and reduced the problem to the Boussinesq nonlinear equation of parabolic type.

TL;DR: In this paper, the calculation formulae for micropolar fluid viscosity coefficients are deduced on the basis of some viscometric and thermal measurements, which can be applied for description of its flow in channels in the majority of eases.

TL;DR: In this paper, the theory of micropolar fluids due to Eringen is used to formulate a set of boundary layer equations for 2-dimensional flow of an incompressible, constant density micropolastic fluid at a stagnation point on a moving wall.

TL;DR: In this article, the effect of rotation on the setting up of convection currents in a quiescent layer of a single component fluid with temperature dependent viscosity embedded in a porous medium bounded by free boundaries has been analyzed using a quasi-linear technique proposed by Palm.

TL;DR: In this paper, the non-steady flow of power-law fluids with a yield stress through a porous medium is investigated, and the approximate solutions in a closed form were obtained by using the integral method.

TL;DR: In this paper, it was shown that the critical value of the initial concentration depends on the criterion chosen, i.e. the appearance of a point of inflexion in the graph of temperature against time.

TL;DR: In this article, an integral transform technique is employed to solve the plane elastodynamic problem of a crack of fixed length propagating at a constant speed in a uniformly stressed medium, assuming that the crack is located in a plane of elastic symmetry of the material.

TL;DR: In this paper, a theory of plastic flow is developed for an elastic-perfectly plastic porous solid with its intercommunicating void spaces filled with a viscous fluid, where full use is made of the thermodynamical equations.

TL;DR: In this article, a numerical solution for the free convection flow past a vertical semi-infinite flat plate embedded in a highly saturated porous medium by allowing the plate to have a non-uniform temperature or a nonuniform heat flux distributions has been developed Both local heat transfer rate and excess surface temperature as a function of the distance along the plate are tabulated for a few cases of prescribed wall temperature and heat flux distribution.

TL;DR: In this article, the frequency and phase velocity of Love wave propagation in a nonissipative liquid filled porous solid underlain by an isotropic and homogeneous half space were derived.

TL;DR: In this paper, the velocity and temperature fields of a viscous fluid through a porous medium bounded by a vertical porous infinite surface are analyzed and the velocity profiles are shown graphically for different values of the permeability parameter.

TL;DR: In this paper, a critical study on the stability of a hot layer of micropolar fluid heated from below with free boundaries has been investigated, and the analysis shows that the method by which the previous investigators (Datta and Sastry, and Perez-Garcia and Rubi) obtained the critical Rayleigh number is not justified and the final result obtained thereby is erroneous.

TL;DR: In this paper, the equations of the linear thermo-elasticity for a composite material were established using homogenization, and it was proved that the macroscopic energy equation contains new corrective coefficients.

TL;DR: In this article, the oscillatory instability and the family of limit cycles associated with a general autonomous dynamical system described by n nonlinear first order differential equations and an independently assignable scalar parameter are examined via an intrinsic method of harmonic analysis.

TL;DR: In this article, the authors developed a membrane theory which depends on the values at the deformed middle surface of physical quantities and their gradients in the thickness direction, which is useful in describing the behavior of rubber-like nonlinearly elastic solids.

TL;DR: In this article, the authors define two non-dimensional parameters Λ = τ w p x δ and R p = U p δ ν where τ w is the wall stress, p x (⪢0) is the pressure gradient to which the turbulent boundary layer (of thickness δ) is subjected, ν is the kinematic viscosity, U p = ( νp x p ) 1 3 is a characteristic velocity and p is the density.

TL;DR: An analytical study for the large deformation of aortic walls, based on the theory of nonlinear viscoelasticity, treating the wall tissue as orthotropic and incompressible, is presented in this paper.