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Time-dependent crack growth characterization using rate integrals

✍ Scribed by K. S. Kim; R. H. Stone

Publisher: Springer Netherlands
Year: 1995
Tongue: English
Weight: 693 KB
Volume: 70
Category: Article
ISSN: 1573-2673
DOI: 10.1007/bf00034138

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✦ Synopsis

This paper investigates the utility of the rate forms of Kishimoto et al.'s integral (J) and Blackbum's integral (J*) as parameters for correlating time-dependent crack growth rates. These rate integrals are computed from the results of finite element analyses of crack growth in button-head single edge notch specimens of Alloy 718. The specimens are tested under constant strain and constant load conditions at 593°C and 649°C. The crack tip deformation includes large-scale plasticity, primary and secondary creep. The measured crack growth rates are correlated with the computed rate integrals. The results show that both integrals can consolidate the crack growth data very well.

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