The dynamic buckling of a thin orthotropic thermoviscoplastic plate is studied by analyzing the stability of a stressed/deformed plate under superimposed infinitesimal perturbations. Elastic deformations are neglected. The wavelength of the perturbation that has the maximum initial growth rate is assumed to determine the buckled shape of the plate. The buckled shape of a rectangular plate loade...

Ah&r&--In this paper, we study the problems of radial diffusion of a fluid through a hollow non-linearly elastic orthotropic cylinder. It is found that shearing and stretching have qualitatively different effects on the diifusion process. The effect of orthotropy on the difision process is also studied. These results are compared with those for the isotropic case [cf. Znr. 1. Engng Sci. 25, 144...

This paper provides explicit analytical expressions for displacement and stress fields in a multilayered composite cylinder with cylindrically orthotropic layers subjected to homogeneous boundary conditions. The solutions are derived in the assumption of perfect bonding between layers. The components of displacement, strain and stress are expressed in terms of the integration constants found fr...

In this paper the secular equation for the Rayleigh wave speed in an incompressible orthotropic elastic solid is obtained in a form that does not admit spurious solutions. It is then shown that inequalities on the material constants that ensure positive definiteness of the strain-energy function guarantee existence and uniqueness of the Rayleigh wave speed. Finally, an explicit formula for the ...

This article covers the general behaviour of a straight uniform pipe, with built-in open ends, subject to internal pressure and in plane bending or curvature. It is intended as a summary of the basic equations driving the unintuitive phenomena of bending and instability of pipes under internal pressure. The analysis covers in addition the investigation of opposite pressure stabilisation effects...

This manuscript aims at characterizing energy densities and constitutive laws of transversely isotropic materials, orthotropic elastic materials and materials with non orthogonal families of fibers. It makes explicit references to results that are scattered over the literature and, although said to be well-known, are not always easy to locate. Direct proofs that are thought to be new and simpli...

The eigenvalue approach has been employed to find the analytical expressions for displacements and stresses at any point of an infinite initially stressed orthotropic elastic medium with the effect of couple stress. A plain strain problem has been studied. New closed forms of displacement and stress components have been obtained. The variations of the displacements and stresses with horizontal ...

The microstructural analysis of Thermal Barrier Coatings, deposited according to the Air Plasma Spray technology, furnishes information according which a strong orthotropic thermal conductivity is expected to be measured for such a material. Pulsed experiment with a localized heating source and thermographic temperature recording, permit to evaluate both the in-depth and in-plane components of ...

This paper deals with the dynamic characterisation of plate structures elliptical orthotropic stiffness properties, using an equivalent thin theory a wave fitting approach. The method consists in projecting experimentally determined transverse displacement field on analytical Green’s function based Hankel’s functions. error between projected and measured fields is then minimized, varying charac...

Abstract We consider a quasilinear degenerate parabolic equation driven by the orthotropic p -Laplacian. prove that local weak solutions are locally Lipschitz continuous in spatial variable, uniformly time.