Poroelastic Solution of a Plane Strain Point Displacement Discontinuity

[+] Author and Article Information
E. Detournay

Dowell Schlumberger Technology Center, Tulsa, OK

A. H-D. Cheng

Department of Civil Engineering, University of Delaware, Newark, DE

J. Appl. Mech 54(4), 783-787 (Dec 01, 1987) (5 pages) doi:10.1115/1.3173117 History: Received September 03, 1986; Revised April 24, 1987; Online July 21, 2009


The plane strain fundamental solution of an instantaneous and a continuous point displacement discontinuity is presented in this paper. These solutions, together with the one of a fluid source, are obtained on the basis of a decomposition technique proposed by Biot, which separates the displacement field into a time independent part satisfying an elasticity equation, and an irrotational part governed by a diffusion equation. We begin the derivation by presenting a continuous edge dislocation. The continuous point displacement discontinuity is obtained by differentiating, along the direction of the cut, the corresponding edge dislocation solution. The instantaneous influence functions are determined by further differentiating with respect to time. The displacement discontinuity and source singularities can be distributed on a crack surface to create displacement and flux jumps required for the numerical modeling of a fracture in a poroelastic medium.

Copyright © 1987 by ASME
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