University of Illinois Urbana-Champaign

Surface motion excited by acoustic emission from buried crack

Harris, John G.; Pott, John

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https://hdl.handle.net/2142/112196

Description

Title
Surface motion excited by acoustic emission from buried crack
Author(s)
  • Harris, John G.
  • Pott, John
Issue Date
1983-05
Keyword(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.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 457
  • 1983-6002
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112196
Sponsor(s)/Grant Number(s)
National Science Foundation MEA 81 04738 83/05
Copyright and License Information
Copyright 1983 Board of Trustees of the University of Illinois

Owning Collections

Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
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.