Transactions of the Korean Society of Mechanical Engineers (대한기계학회논문집)
- Volume 13 Issue 1
- /
- Pages.96-104
- /
- 1989
- /
- 1225-5963(pISSN)
DOI QR Code
Study of Fracture Toughness Measurement and Fracture Stability Evaluation by Acoustic Emission Method
음향 방출법에 의한 파괴 인성치 측정 및 파괴 안정성 평가를 위한 연구
- Published : 1989.01.01
Abstract
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.
본 연구에서는 AE법에 의해 J
Keywords