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Influence of crack contour approximation method on calculated fatigue life in semi-elliptical craks growth analysis

Jankowiak A., Jakubczak H.

Zeszyty Naukowe Instytutu Pojazdów / Politechnika Warszawska

2006

z. 4/63

87-92

Prediction of residual life of structural components spent on the stable crack growth needs a crack growth analysis starting from an initial crack-like flaw. The method of crack growth analysis based on stress intensity factors calculated using point-load weight function is presented in the paper. Especially the influence of the crack contour approximation method on the calculated fatigue life is discussed. Examples of semi-elliptical surface crack growth analysis under arbitrary mode I stress fields are presented in the paper.