A Comparative Study of Methods to Predict Fatigue Crack Growth under Random Loading

랜덤하중 하에서 피로균열진전예측 방법들의 비교

  • 이학주 (한국기계연구원 기계구조부) ;
  • 강재윤 (한국기계연구원 기계구조부) ;
  • 최병익 (한국기계연구원 기계구조부) ;
  • 김정엽 (여수대학교 기계자동차공학부)
  • Published : 2003.10.01


Methods to predict fatigue crack growth are compared in a quantitative manner for crack growth test data of 2024- T351 aluninum alloy under narrow and wide band random loading. In order to account for the effect of load ratio, crack closure model, Hater's equation and NASGRO's equation have been employed. Load interaction effect under random loading has been considered by crack closure model, Willenborg's model and Wheeler's model. The prediction method using the measured crack opening results provides the best result among the prediction methods discussed for narrow and wide band random loading data.


Fatigue Crack Growth;Crack Closure;Random Loading;Crack Growth Retardation


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