TITLE

Critical time for acoustic wavesin weakly nonlinear poroelastic materials

AUTHOR(S)
Wilmanski, K.
PUB. DATE
May 2005
SOURCE
Continuum Mechanics & Thermodynamics;May2005, Vol. 17 Issue 2, p171
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The final time of existence (critical time) of acoustic waves is a characteristic feature of nonlinear hyperbolic models. We consider such a problem for poroelastic saurated materials of which the material properties are described by Signorini-type constitutitve relations for stresses in the skeleton, and whose material parameters depend on the current porosity. In the one-dimensional case under consideration, the governing set of equations describes changes of extension of the skeleton, a mass density of the fluid, partial velocities of the skeleton and of the fluid and a porosity. We rely on a second order approximation. Relations of the critical time to an initial porosity and to an initial amplitude are discussed. The connection to the threshold of liquefaction is indicated.
ACCESSION #
16778200

 

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