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혼합모드 단일과대하중에 의한 하중상호작용이 피로균열 전파거동에 미치는 영향
이정무(Jeongmoo Lee),송삼흥(Samhong Song) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
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-plastic tone could be evaluated? As applying mode of single of ·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 between aspects 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 tire observed deformation at crack and crack propagation behavior obtained from fatigue tests.