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Aspect of Finite Element Analysis Methods for Prediction of Fatigue Crack Growth Rate

Author Affiliations

  • 1Swami Vivekanand College of Engineering, Indore, MP, INDIA

Res. J. Recent Sci., Volume 1, Issue (2), Pages 85-91, February,2 (2012)


An attempt is made to predict the fatigue crack path using the finite element analysis to design a body against fatigue failure. Till now consideration is taken that the fatigue failures is always straight i.e. (Straight extending crack) but in practice the cracks fond in any body deviate or extend more in a zig zag manner due to mixed mode stress produced. The change in stress state mode caused by the deviation of a crack affect the succeeding crack path and its growth rate. Because of these reasons prediction of crack path and growth rate is more important for fatigue life evaluations. The use of the finite element method enabled the subsequent tracking of deflecting crack extension. In this paper we try to demonstrate the capability and its limitations, in predicting the crack propagation trajectory and the SIF values under linear elastic fracture analysis.


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