In the second part of this paper we describe both epicentral and off‐epicentral responses corresponding to the acoustic emission (AE) source of a Mode I type penny‐shaped crack generated by the indentation technique. The characteristics of the source are described in terms of the components of the moment tensor and its time function which were recovered from the waveforms coupled with an analysis of the AE radiation pattern described in Part I of this paper [J. Appl. Phys. 59, 2704 (1986)]. The recovered source characteristics indicate that the dominant contribution to the AE source of the penny‐shaped crack comes from a single dipole acting normal to the crack plane whose temporal characteristics resemble those of a terminated parabolic ramp function.
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15 April 1986
Research Article|
April 15 1986
Acoustic emissions from penny‐shaped cracks in glass. II. Moment tensor and source‐time function
Kwang Yul Kim;
Kwang Yul Kim
Department of Theoretical and Applied Mechanics, Cornell University, Ithaca, New York 14853
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Wolfgang Sachse
Wolfgang Sachse
Department of Theoretical and Applied Mechanics, Cornell University, Ithaca, New York 14853
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J. Appl. Phys. 59, 2711–2715 (1986)
Article history
Received:
September 06 1985
Accepted:
December 18 1985
Citation
Kwang Yul Kim, Wolfgang Sachse; Acoustic emissions from penny‐shaped cracks in glass. II. Moment tensor and source‐time function. J. Appl. Phys. 15 April 1986; 59 (8): 2711–2715. https://doi.org/10.1063/1.336979
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