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

Jan D. Achenbach

doi:10.2140/jomms.2009.4.649

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

Jan D. Achenbach^*

^*Corresponding author for this work

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

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.

Original language	English (US)
Pages (from-to)	649-657
Number of pages	9
Journal	Journal of Mechanics of Materials and Structures
Volume	4
Issue number	4
DOIs	https://doi.org/10.2140/jomms.2009.4.649
State	Published - Apr 2009

Keywords

Acoustic emission
Crack
Cyclic loading
Layer
Reciprocity theorem

ASJC Scopus subject areas

Mechanics of Materials
Applied Mathematics

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10.2140/jomms.2009.4.649

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AB - 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.

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KW - Crack

KW - Cyclic loading

KW - Layer

KW - Reciprocity theorem

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

Abstract

Keywords

ASJC Scopus subject areas

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