Mathematical theory of acoustic emission and moment tensor solution.
-
- OHTSU Masayasu
- Department of Civil Engineering, Kumamoto University
Bibliographic Information
- Other Title
-
- アコースティック・エミッションの波形解析理論とモーメントテンサー解に関する考察
- アコースティック エミッション ノ ハケイ カイセキ リロン ト モーメント
Search this article
Abstract
The development of mathematical theory of acoustic emission (AE) is summarized, and a waveform analysis of the moment tensor solution is proposed. On the basis of the theory, vertical surface motions (AE) in the disbonding process of stainless overlay were simulated, determining source characteristics from the observation of a micrograph. It is confirmed that a simulated displacement agrees quite well with a detected AE waveform up to the arrival of reflection waves, including the scale of amplitude.<br>To check the effect of the inclined angle on results of the deconvolution analysis, simulated waveforms were deconvoluted with error on the inclination angle. According to the results, unless the inclination angle is correctly known, the source time functions obtained may include considerable error except for a rise time. It implies that the determination of crack orientation is of significant importance, before attempting the deconvolution analysis.<br>The applicability of the moment tensor solution was investigated by numerical experiments for inclined tensile and shear cracks. Simulated AE waveforms in a half space were employed, and then components were determined within 8% discrepancy. The results of the eigenvalue analysis show a great promise of the moment tensor solution for determining the crack type and the crack orientation.
Journal
-
- Journal of the Society of Materials Science, Japan
-
Journal of the Society of Materials Science, Japan 36 (408), 1025-1031, 1987
The Society of Materials Science, Japan
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390001205392306816
-
- NII Article ID
- 110002297171
- 10003876167
-
- NII Book ID
- AN00096175
-
- ISSN
- 18807488
- 05145163
- http://id.crossref.org/issn/05145163
-
- NDL BIB ID
- 3138720
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed