Abatraet-The new failure criterion of rock in plastic strain space is presented upon previous experiment results and the hypothesis that dissipation energy in a material causes failure. The main characteristics and applications to rocks of the criterion are discussed. The criterion can well explain
Development of the theory of acoustic emission by propagating cracks in terms of fracture mechanics
β Scribed by M.V. Lysak
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 602 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0013-7944
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β¦ Synopsis
Akaract--This paper presents the generalized results obtained in investigations of growing crack acoustic emission (AE) from a standpoint of fracture mechanics. The models of crack initiation and subcritical growth in quasi-brittle materials were elaborated for this purpose. Non-stationary dynamic problems of the crack theory were formulated on their basis. The variety of new analytical relationships between crack parameters and AE signal parameters suitable for engineering calculations was obtained.
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