SEDL / STP / STP1077-EB / STP19107S

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

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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.