STP1077: Acoustic Emission Monitoring and Analysis Procedures Utilized During Deformation Studies on Geologic Materials

    Sun, X
    graduate assistantchairman of the Geomechanics Sectionassistant director, The Pennsylvania State UniversityNational Geophysical Research Institute, University ParkHyderabad, Pennsylvania

    Hardy, HR
    graduate assistantchairman of the Geomechanics Sectionassistant director, The Pennsylvania State UniversityNational Geophysical Research Institute, University ParkHyderabad, Pennsylvania

    Rao, MVMS
    graduate assistantchairman of the Geomechanics Sectionassistant director, The Pennsylvania State UniversityNational Geophysical Research Institute, University ParkHyderabad, Pennsylvania

    Pages: 16    Published: Jan 1991


    Abstract

    During a recent detailed study, AE signals generated from rock specimens stressed to failure during uniaxial compressive tests were monitored and recorded on a SONY (AV-3650) videocorder. Various AE parameters, including: amplitude, pulse width, ringdown count, rms level, etc…, were then extracted during videocorder playback. The data acquisition and processing techniques used are discussed in this paper. Amplitude distribution analysis was carried out by dividing the AE events into four categories according to their maximum amplitude. This analysis provides a better appreciation of the overall deformation process.

    Keywords:

    AE quiescence, amplitude distribution, b-value, dilatancy point, elliptical crack model, event increment rate, geologic materials, inelastic deformation, microfracturing, precursor of failure, rock, stress concentration, total stress-strain curve


    Paper ID: STP19107S

    Committee/Subcommittee: E07.04

    DOI: 10.1520/STP19107S


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