Showing papers in "International Journal of Engineering Science in 1986"

TL;DR: In this paper, the equivalent inclusion method is proposed to solve the steady state heat conduction problems in composites. But it is not applicable to the case of high concentrations of ellipsoidal inhomogeneities.

TL;DR: In this paper, the authors investigated the effective conductivities of composite media in which a thermal boundary resistance exists at constituent interfaces and developed a procedure for computing effective moduli of composite with embedded spheroidal inclusions at a dilute concentration ratio.

TL;DR: In this paper, the authors derived expressions for various curves of interest to experimenters; among these, the initial magnetization curve, hysteresis loops with specified extremal values of H, and the boundary of the accessible region of the (H, B)-plane.

TL;DR: In this article, an additional boundary condition for solid-fluid mixtures is proposed for the situation in which a mixture boundary is in a saturated state, derived from a thermodynamic characterization of the state and taking the form of a relationship between the total stress tensor, the stretch tensor and the volume fraction of the solid.

TL;DR: In this paper, a new penalty method for the analysis of free boundary problems in elastohydrodynamic lubrication (EHL) is introduced and convergence of the penalty solutions to the solution of the Reynolds-Hertz problem of EHL is proved.

TL;DR: In this article, a material force in the form of a path-independent integral for the elastic dielectric is derived employing Toupin's [1] formulations, where the quantity playing the role of the physical stress tensor in this formulation is the material momentum tensor.

TL;DR: In this article, the authors considered the presence of an externally applied magnetic field that is oblique to the lower surface of a rigid rectangular smooth plate and a porous rectangular plate composed of three thin layers with different porosities.

TL;DR: In this paper, a theory of micropolar thermoelasticity, including heat-flux among the constitutive variables, is formulated and an equation of energy balance and a theorem on the uniqueness of solution are deduced for anisotropic materials.

TL;DR: In this article, a new model for the conduction mechanism was proposed and applied to the problem of heat conduction due to laser irradiation at high power intensities (i.e. 1010 w/m2) at the upper end of temperature rise time.

TL;DR: In this paper, the transition to the swollen state is assumed to occur at a very thin zone or front, where the mass loss through outgassing occurs at the front, and this gives rise to a large increase in the volume of the paint particles as they are traversed by the front.

TL;DR: In this paper, the basic equations governing the interaction of mechanical and electromagnetic fields in the self-reinforced elastic bodies of Spencer are formulated and the influence of an external magnetic field on the propagation of purely transverse waves polarized parallel to the plane faces in a homogeneous, initially unstressed, infinitely conducting, self reinforced elastic flat plate extending to infinity.

TL;DR: In this paper, the authors studied the propagation of plane harmonic waves in homogeneous anisotropic generalized thermoelastic materials and found that four dispersive wave modes are possible, and high and low-frequency approximations have been obtained for all the modes.

TL;DR: In this article, a general numerical procedure is presented for determining the 3D stress singularities in anisotropic materials and composites, where the geometry near the singular point can be represented by a conical wedge whose lateral surface is generated by straight lines passing through the wedge apex.

TL;DR: In this paper, a theoretical study for the propagation of pressure waves in a fluid flowing through a porous medium, with special emphasis on the problems related to the interpretation of the attenuation mechanism of Stoneley's wave in acoustical well logging, is presented.

TL;DR: In this article, the effect of unsteadiness on mhd flow of a conducting incompressible viscous fluid in channels of varying cross-sections is considered, assuming that the cross section of the channel varies slowly the first, second harmonics and the steady streaming solutions are obtained for a flow in which volume flux is prescribed.

TL;DR: In this paper, the use of interface models greatly facilitates the mathematical analysis of static friction phenomena, and they also appear to provide a satisfactory substitute to the classical approach in terms of a variational problem with unilateral constraint.

TL;DR: In this paper, the transient response of one-dimensional axisymmetric quasistatic coupled thermoelastic problems is studied in terms of temperature increment and displacement, and the general solutions of the governing equations are obtained in the transform domain.

TL;DR: In this paper, the effect of microstructure on the thermal convection in a rectangular box of fluid heated from below has been investigated by applying the micropolar fluid theory.

TL;DR: In this paper, a new method is proposed for the analysis of elastic contact problems for a flat punch of arbitrary planform under the action of a normal centrally applied force, based on an integral representation for the reciprocal distance between two points obtained by the author earlier.

TL;DR: In this paper, a detailed numerical solution to an idealized penetration problem is presented in an attempt to shed some light on these matters, and the approach taken is as follows: assuming that the penetrator is in the intermediate stages of penetration so that the active target/penetrator interface is at least one or two penetrator diameters away from either target face, and still much longer than several diameters and is still traveling at a speed close to its striking velocity.

TL;DR: In this paper, a description of macroscopic pore structure is discussed in regards to fluid flow through a porous media using volume and area averaging procedures for relative fluid flow, an anisotropic pore shape is defined by two parameters: the volume porosity and the second order structural permeability tensor, which allows for a consideration of fluid flow described by the volume average velocity as the superposition of three one-dimensional flows at the area average velocities along mutually perpendicular directions.

TL;DR: In this article, the authors derived path-independent integral for a crack placed in an infinite dielectric medium subjected to a far field uniaxial tension and an external electric field.

TL;DR: In this article, a phenomenological theory of elastic semiconductors is presented, in which generalized Ohm's and Fourier's laws are obtained in which gradients of the chemical potential associated with charge carriers and the conduction current play a crucial role.

TL;DR: In this article, the authors considered the elastostatic contact problem of a semi-infinite cylinder compressed against a half space, where the contact between the cylinder and the half space is frictionless and only compressive normal tractions can be transmitted through the interface.

TL;DR: A new mesh optimization technique for finite element methods is presented based on a minimization of an interpolation error estimate and can be viewed as a generalization of existing conformai map-type mesh generators.

TL;DR: In this article, it was shown that the dynamics of micropolar continua can be represented by solitary waves, jointly in the microrotation angle and one or two elastic displacements depending as whether a Bloch or Neel wall is considered.

TL;DR: In this article, a theoretical analysis for evaluating the rheological effects of non-Newtonian behavior of the displacing fluid on the interface stability in a radial displacement in a porous medium has been performed.

TL;DR: In this paper, the geometrical structure of a material manifold with dislocations and disclinations is explored by applying vielbein theory and gauge field theory, and two kinds of connections, namely the affine and the gauge connection are introduced for describing the characteristics of plastic imperfections.

TL;DR: In this paper, the results of the single scattering problem were applied to the propagation of low frequency waves in a composite containing a dilute concentration of spherical inclusions, and explicit formulae were given for the effective wave speeds and attenuations when the inclusions are voids.

TL;DR: In this paper, third-order and fourth-order bounds on the effective transverse thermal conductivity k e of fiber-reinforced materials (statistically isotropic in the transverse plane) due to Silnutzer and to Milton, respectively, are evaluated for a distribution of fully penetrable cylinders in a matrix.