Transactions of the Korean Society of Mechanical Engineers (대한기계학회논문집)
- Volume 11 Issue 2
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- Pages.243-252
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- 1987
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- 1225-5963(pISSN)
DOI QR Code
Surface crack propagation behavior and crack closure phenomena in 5083-H113 aluminum alloy
5083-H113 알루미늄合金의 表面균열進展擧動과 균열닫힘 現象
Abstract
The propagation and closure behavior of surface crack initiated at a sharply notched specimens were investigated in 5083-H113 aluminium alloy under constant amplitude of tension load by the unloading elastic compliance method. The crack shape (aspect ratio) was found to be approximately semicircular during the crack was being small and to be changed to semi-elliptical during it was being long. The propagation rate of a surface crack initiated from notch root decelerated with increasing crack length when the crack was small and then accelerated when it was large. The effect of stress ratio was large in lower .DELTA.K range, but the effective stress intensity factor range .DELTA.K
본 논문에서는 작은 인공결함을 가진 표면균열의 진전거동을 밝히기 위하여 용접성이 좋고 강도도 적당하며 내식성이 좋아 해양구호무재 및 용접구호물재로서 널 리 사용되는 5083-H113 알루미늄합금을 준비하고 이재료의 피로표면균열 진전거동에 미치는 응력비의 영향을 균열닫힘과 함께 검토하였다.
Keywords
- Fatigue Surface Crack;
- Aspect Ratio;
- Effective Stress Intensity Factor Range;
- Plasticity-Induced Crack Closure
- 피로표면균열;
- 형상비;
- 유효응력 확대계수폭;
- 소성유기 균열닫힘;