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RESEARCH PAPERS

Exponentially Decaying Pressure Pulse Moving With Constant Velocity on the Surface of a Layered Elastic Material (Superseismic Layer, Subseismic Half Space)

[+] Author and Article Information
J. P. Wright

Paul Weidlinger, New York, N. Y.

M. L. Baron

Paul Weidlinger; Columbia University, New York, N. Y.

J. Appl. Mech 37(1), 141-152 (Mar 01, 1970) (12 pages) doi:10.1115/1.3408423 History: Received February 13, 1969; Online July 12, 2010

Abstract

The response of a layered elastic half space to a progressing exponentially decaying normal surface pressure is evaluated for a case in which the constant velocity V of the moving pressure is greater than that of the P and S waves, respectively, in the upper layer (superseismic) and smaller than these wave speeds in the underlying half space (subseismic). It is assumed that a steady state exists with respect to coordinate axis attached to the moving load. The superseismic-subseismic geometry results in a stress field that extends over the entire plane, with sharp shocks possible only in that portion of the layer that lies behind the front of the progressing normal loading. A computer program for evaluating stresses and velocities at points in the medium was developed and results are presented for a typical configuration of interest.

Copyright © 1970 by ASME
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