SEDL / STP / STP803V2-EB / STP36793S

Elastic-Plastic Fracture Mechanics Analysis of Fatigue Crack Growth

El Haddad, MH
Assistant professor, Cairo University, Giza, Cairo

Mukherjee, B
Unit head, Fracture Mechanics, Ontario Hydro Research, Toronto, Ont.

Pages: 19    Published: Jan 1983

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Abstract

Fatigue crack growth rate data are obtained for ASTM A516 Grade 70 steel subjected to elastic and elastic-plastic cyclic loading for both load-controlled and displacement-controlled test conditions. Cyclic J-integral values estimated from load versus deflection hysteresis loops and crack closure estimates are correlated with growth rate data. The cyclic J-crack growth rate data agree well with that from the linear elastic tests. The J-integral parameter is shown to be better than the linear elastic parameter K in correlating fatigue crack growth, particularly so in ductile materials such as A516 steel and at high load levels.