Acoustic emission from a surface-breaking crack in a layer under cyclic loading

Achenbach, Jan

doi:10.2140/jomms.2009.4.649

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Acoustic emission from a surface-breaking crack in a layer under cyclic loading

Jan D. Achenbach

Vol. 4 (2009), No. 4, 649–657

DOI: 10.2140/jomms.2009.4.649

Abstract

An isotropic, homogeneous, elastic layer is subjected to a time-harmonic tensile stress of constant amplitude parallel to the free surfaces. The cyclic stresses are assumed to generate a surface-breaking crack of length $l (t)$ which propagates normally to the top surface of the layer. The unloading of the crack faces generates acoustic emission, which is composed of Lamb waves. The elastodynamic reciprocity theorem for time-harmonic waves is used to determine the amplitudes of the radiated system of time-harmonic Lamb waves.

Keywords

layer, crack, cyclic loading, acoustic emission, reciprocity theorem

Milestones

Received: 18 December 2007

Accepted: 4 March 2008

Published: 7 August 2009

Authors

Jan D. Achenbach
Center for Quality Engineering and Failure Prevention Northwestern University 2137 N. Tech Drive Evanston, IL 60208 United States
http://www.mech.northwestern.edu/web/people/faculty/achenbach.php

Vol. 4, No. 4, 2009

Jan D. Achenbach

Abstract

Keywords

Milestones

Authors