On the basis of the successful results of our previous study on a J-integral approach to the creep crack propagation of steels, the applicability of the creep J-integral to the time dependent fatigue crack propagation in creep range was studied. A satisfactory correlation was obtained between crack propagation rate and creep J-integral, and the same correlation was found in creep crack propagation under constant load as well as two-step loading. It was also found that the cycle dependent fatigue crack propagation rate could be successfully correlated by the cyclic J-integral. The high crack propagation rate in large scale yielding fatigue may be in agreement with the straight line extrapolation on log-log plots of the linear elastic fatigue crack propagation rate versus cyclic J-integral data.
Application of J-Integral to High-Temperature Crack Propagation: Part II—Fatigue Crack Propagation
Taira, S., Ohtani, R., and Komatsu, T. (April 1, 1979). "Application of J-Integral to High-Temperature Crack Propagation: Part II—Fatigue Crack Propagation." ASME. J. Eng. Mater. Technol. April 1979; 101(2): 162–167. https://doi.org/10.1115/1.3443669
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