한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제7권4호
  • /
  • Pages.55-64
  • /
  • 1990
  • /
  • 1225-9071(pISSN)
  • /
  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

고강도 알루미늄에서의 균열닫힘이 미소 피로균열의 전파거동에 미치는 영향

Crack Closure Effects on Small Fatigue Crack Growth Behavior in High Strength Aluminum

  • 이현우 (부산대학교 공과대학 정밀기계공학과)
  • Lee, Hyeon-U (Dept.of Precision Mechanical Engineering, Engineering College, Busan National University)
  • 발행 : 1990.12.01
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초록

The fatigue crack growth behavior of physically-short cracks(0.2${\Delta}K$ with $da/dN<1{\times}10^{-7}m/cycle$. The transition crack lengths where similtude with ${\Delta}K$ existed was between 1 and 2mm. The effective stress intensity factor range based on COD measurements gave better correlation between the physically-short and long cracks. Thus it can be considered that the crack closure effect is one of the main factors which causes the differences between these two cracks.

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