SEDL / STP / STP590-EB / STP33940S

Fatigue Crack Growth During Gross Plasticity and the J-Integral

Dowling, NE
Senior engineers, Westinghouse Research Laboratories, Pittsburgh, Pa.

Begley, JA
Senior engineers, Westinghouse Research Laboratories, Pittsburgh, Pa.

Pages: 22    Published: Jan 1976

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Abstract

An attempt is made to apply the J-integral concept as an elastic-plastic criterion for fatigue crack growth. Compact tension fracture specimens of A533B steel are subjected to gross cyclic plastic deformations, and fatigue crack growth rates up to 0.01 in./cycle are obtained. The results show correlation with J-integral values estimated from load versus deflection hysteresis loops. Also, agreement is obtained with the extrapolation of linear elastic fatigue crack growth rate data.