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Title:Surface motion excited by acoustic emission from buried crack
Author(s):Harris, John G.; Pott, John
Subject(s):Surface Motion
Acoustic Emissions
Buried Crack Facture Processes
Abstract:The surface motion excited by acoustic emissions produced by fracture processes at the edge of a buried, penny-shaped crack are investigated. Firstly, wavefront approximations to the emissions generated by the sudden growth of a tensile crack in an unbounded elastic solid are reviewed. Then these approximations are Fourier transformed to give the high-frequency portion of their spectra. Secondly, time- and frequency-domain approximations to the surface motions excited by this growing crack, when it is buried in a half-space, are calculated. These results are then scrutinized to elucidate what parts of the signals measured at the surface carry information about the crack's size, its orientation and the fracture processes near the crack-tip.
Issue Date:1983-05
Publisher:Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report:TAM R 457
Genre:Technical Report
Sponsor:National Science Foundation MEA 81 04738 83/05
Rights Information:Copyright 1983 Board of Trustees of the University of Illinois
Date Available in IDEALS:2021-11-04

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  • Technical Reports - Theoretical and Applied Mechanics (TAM)
    TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.

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