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RESEARCH PAPERS

Influence of Rotatory Inertia on Steady-State Crack Propagation in a Finite Plate Subjected to Out-of-Plane Bending

[+] Author and Article Information
A. F. Fossum

Terra Tek, Inc., Salt Lake City, Utah

J. Appl. Mech 45(1), 130-134 (Mar 01, 1978) (5 pages) doi:10.1115/1.3424214 History: Received March 01, 1977; Online July 12, 2010

Abstract

A dynamic stress-intensity factor and energy release rate are obtained for a running semi-infinite crack traversing a strip of elastic material subjected to out-of-plane bending. It is shown that the maximum ratio of crack tip velocity to shear wave velocity is identical to the maximum ratio of flexural wave velocity to shear wave velocity in the limit of vanishingly small wavelength. The dynamic stress-intensity factor is written as the product of a static stress-intensity factor multiplied by a function of Poisson’s ratio and crack tip velocity the function decreasing monotonically with increasing crock tip velocity. The energy release rate is shown to be independent of crack tip velocity for this type of problem.

Copyright © 1978 by ASME
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