알루미늄 5083의 피로균열 진전에 따른 수명예측 및 비파괴평가

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 15; no. 2; pp. 94 - 98
• Main Author: 남기우(KI-WOO NAM)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2001
• Subjects: Life prediction 수명예측; Load cycle 하중 사이클; Stress ratio 응력비; Nondestructive evaluation 비파괴평가; Leak before break 파단전누설; Fatigue crack propagation 피로균열전파; Acoustic emission 음향방출; Joint time-frequency analysis method 시간-주파수 해석법; -
• ISSN: 1225-0767; 2287-6715

fatigue life and nondestructive evaluation were examined experimentally using surface crack specimen and compact tension specimen of 5083 aluminium alloy. Acoustic emission signals emanated during failure of aluminum alloys has been the subject of numerous investigations. Possible sources of AE during deformation have been suggested as the dislocations, fracture of brittle particles and debonding of these particles from the alloy matrix. Fatigue life and penetration behavior of long surface crack can be evaluated quantitatively using K values proposed by authors. The influence of stress ratio on the frequency characteristics of AE signals were investigated.