Factors affecting the relative magnitude of acoustic emissions generated during the fracture of granite

Charles Dowding, Christopher G. Mueller

Research output: Contribution to conferencePaper

2 Scopus citations

Abstract

Relative event magnitudes of acoustic emissions (AE) generated during the fracture of granite were examined and have been shown to depend on the proximity to the visible fracture, type of loading, and crystal size of the test specimen. A method was advanced for characterizing the relative strength of acoustic emissions based on a knowledge of the rate at which the signals decayed with distance from the source. In the small crystal size (1 mm) granite, AE events associated with fixed crack-mouth displacement (holding) were approximately twice as energetic as events associated with reduced crack-mouth displacement (unloading). The influence of crystal size on relative event magnitudes was most apparent during unloading, for which AE events in the large crystal size (10 mm) granite were on the average 3.5 times as energetic as events in the 1 mm granite.

Original languageEnglish (US)
Pages359-366
Number of pages8
StatePublished - Jan 1 1987
Event28th U.S. Symposium on Rock Mechanics, USRMS 1987 - Tucson, United States
Duration: Jun 29 1987Jul 1 1987

Other

Other28th U.S. Symposium on Rock Mechanics, USRMS 1987
CountryUnited States
CityTucson
Period6/29/877/1/87

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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    Dowding, C., & Mueller, C. G. (1987). Factors affecting the relative magnitude of acoustic emissions generated during the fracture of granite. 359-366. Paper presented at 28th U.S. Symposium on Rock Mechanics, USRMS 1987, Tucson, United States.