Evaluation of Fracture Mechanics Parameters for A27 Cast Steel
by
E. M. Caulfield
Department of Theoretical and Applied Mechanics
Abstract
The fracture toughness of an A27 cast steel was evaluated using the J-integral approach. The effect of range of stress intensity factor on fatigue crack growth rate was also determined. In the course of the study a more accurate method of establishing the existing crack length through a compliance technique was also developed.
An effort was made to review the critical concepts of linear elastic fracture mechanics for "valid" kIc testing, J-integral method for toughness testing, and fatigue crack growth rate for conditions of cyclic loading.
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