한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제21권6호
  • /
  • Pages.109-116
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  • 2004
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

단일과대하중의 작용모드가 피로균열의 전파거동에 미치는 영향

Effects by Applying Mode of Single Overload on Propagation Behavior of Fatigue Crack

  • 송삼홍 (고려대학교 공과대학 기계공학과) ;
  • 이정무 (고려대학교 공학기술연구소)
  • 발행 : 2004.06.01
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초록

In this study, when variable-amplitude load with various applying mode acts on the pre-crack tip, we examined how fatigue cracks behave. Hence aspects of the deformation caused by changing the applying mode of single overload and propagation behavior of fatigue crack were experimentally examined: What kinds of the deformation would be formed at pre-crack and its tip\ulcorner What aspects of the residual plastic deformation field would be formed in front of a crack\ulcorner How aspects of the plastic zone could be evaluated\ulcorner As applying mode of single overloading changes, the deformation caused by tensile and shear loading variously showed in each applying mode. The different aspects of deformation make influence on propagation behavior of cracks under constant-amplitude fatigue loading after overloading with various modes. We tried to examine the relationship between aspects of deformation and fatigue behavior by comparing the observed deformation at crack and crack propagation behavior obtained from fatigue tests.

키워드

참고문헌

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