Accession Number : AD0746617

Title :   On Wave Propagation in a Mixture of Linear Elastic Materials,

Corporate Author : BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : Bowen,Ray M. ; Wright,Thomas W.

Report Date : MAY 1972

Pagination or Media Count : 66

Abstract : The work concerns the propagation of wave fronts in a mixture of fluids and isotropic solids. Only mechanical effects are included. In the derivation of the equations the importance of buoyancy forces is demonstrated. It is shown that these forces arise from a local interaction among the constituents of the mixture and are present even in the absence of diffusion. It is also shown that there are as many longitudinal waves possible as there are constituents and that there are as may transverse waves possible as there are solid constituents. Rules for the evolution of discontinuities on wave fronts are deduced. Diffusion causes a decay in wave strength which is additional to the usual geometric decay familiar from classical elasticity. (Author)

Descriptors :   (*MIXTURES, MECHANICAL WAVES), SOLIDS, FLUIDS, BUOYANCY, ELASTIC PROPERTIES, DIFFUSION, MATHEMATICAL MODELS, THERMODYNAMICS

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE