Journal of the Korean Society for Precision Engineering (한국정밀공학회지)
- Volume 14 Issue 6
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- Pages.83-89
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- 1997
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- 1225-9071(pISSN)
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- 2287-8769(eISSN)
A Study on Fatigue Crack Retardation and Retardation Mechanism in Variable Loading
변동하중하에서의 피로크랙 지연현상과 지연기구에 관한 연구 - 균열성장 지연현상에 미치는 균열 가지의 영향 -
Abstract
In order to study on fatigue crack retardation and retardation mechanism in variable loading, the effects of crack tip branching in fatigue crack growth retardation were examined. The characteristics of crack tip banching behavior was considered to micro structure. It was examined that the variation of crack tip branching angle. Crack tip branching was observed along the grain boundary of ferrite and pearlite structure. It was found that the abanching angle ranges from 25 to 53 degrees. Using the finite element method, the variable of crack driving force to branching angle was examined. The effective crack driving force (
Keywords
- Crack grwoth retardation;
- Crack tip branching;
- Crack tip branching angle;
- Kinked type branch;
- Forked type branch;
- Effective crack driving force;
- Retardation mechanism
- 균열성장지연;
- 균열가지;
- 균열가지각;
- kink 형태 균열가지;
- for 형태 균열가지;
- 유효균열진전력;
- 지연기구;