Assessment of the Sensitivity of Crack Growth Rate Constants to Predictive Accuracy of Part-Through Crack Fatigue Life Predictions

JB Chang

doi:10.1520/STP35038S

SYMPOSIA PAPER Published: 01 January 1979

STP35038S

Assessment of the Sensitivity of Crack Growth Rate Constants to Predictive Accuracy of Part-Through Crack Fatigue Life Predictions

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Fatigue crack life predictions were performed for specimens containing part-through cracks subjected to constant-amplitude loading. A computer routine, EFFGRO, was employed in the crack growth predictions. Three rounds of predictions were made by using different crack growth rate constants derived from the compact- type (CT) specimen da/dN versus ΔK data. The predictive accuracies of each round of predictions were assessed. The results show that accurate predictions of part-through crack fatigue lives using CT specimen crack growth rate data can be achieved if there are known part-through crack test data serving as guidelines.

Author Information

Chang, JB

Rockwell International, Los Angeles, Calif.

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Details

Developed by Committee: E08

Pages: 156–167

DOI: 10.1520/STP35038S

ISBN-EB: 978-0-8031-4754-6

ISBN-13: 978-0-8031-0532-4

Assessment of the Sensitivity of Crack Growth Rate Constants to Predictive Accuracy of Part-Through Crack Fatigue Life Predictions

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