2003年8月
Electric signals accompanying fracture of granite
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
- ,
- ,
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- 巻
- 42
- 号
- 8
- 開始ページ
- 5208
- 終了ページ
- 5212
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1143/JJAP.42.5208
- 出版者・発行元
- INST PURE APPLIED PHYSICS
Pre-heated specimens of granite were uniaxially compressed. Electric charge of the order of 10(-11)C accompanying fracture of the specimen was measured within a deformation accelerating precursory period until complete failure occurred. Specimens that had been pre-heated to 200degreesC exhibited the highest, electric charge, and signal intensity decreased with increasing pre-heating temperature. Meanwhile, uniaxial strength of the specimen Was the highest, 220 MPa, for the specimens that had been pre-heated to 200degreesC and it decreased with pre-heating temperature. Our results suggest that the intensity of the electric precursor signal detected prior to failure positively correlates,with uniaxial strength. ESR signal intensity of the E' center of quartz contained in the fractured granite specimen decreased upon failure. Stress-induced annealing of the E' center is the suggested cause of the signal decrease.
- リンク情報
- ID情報
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- DOI : 10.1143/JJAP.42.5208
- ISSN : 0021-4922
- identifiers.cinii_nr_id : 9000239248799
- Web of Science ID : WOS:000185422900067