대한기계학회논문집 (Transactions of the Korean Society of Mechanical Engineers)
- 제13권1호
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- Pages.96-104
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- 1989
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- 1225-5963(pISSN)
DOI QR Code
음향 방출법에 의한 파괴 인성치 측정 및 파괴 안정성 평가를 위한 연구
Study of Fracture Toughness Measurement and Fracture Stability Evaluation by Acoustic Emission Method
- 발행 : 1989.01.01
초록
본 연구에서는 AE법에 의해 J
The behaviors of acoustic emission emitted in the tests of the fracture toughness and fracture stability are observed by using the specimens of aluminum 2024-T351 and 7039-T6 alloys. The empirical eqution of J-R curve is derived. It is demonstrated from the comparison of the fracture toughness obtained from J-R curve with that from ASTM standard E813-81 that the latter is larger than the former. The discontinuous point in the log-log graph of J-integral vs. total acoustic emission count is observed in between the two offset lines referred from ASTM standard E813-81, but it's physical meaning is uncretain. An empirical material tearing modulus is derived in terms of the total acoustic emission count and proved to be valid in fracture instability test.
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