Journal
ENGINEERING FRACTURE MECHANICS
Volume 71, Issue 12, Pages 1779-1790Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2003.06.001
Keywords
load ratio effects; crack driving force; crack growth rate
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This paper summarizes a study which has been conducted to examine the recently proposed fatigue crack driving force parameter, K* = K-max(alpha)(DeltaK(+))((1-alpha)), and its ability to predict the crack growth rate for different R-ratios. A validation of the effectiveness of the proposed K* parameter relative to the existing crack closure approach, DeltaK(eff), is analyzed and discussed. Experimental data for ten different types of materials taken from literature were used in the analyses. Presented results indicate that the K* parameter is equally effective or better than DeltaK(eff) in correlating and predicting the R-ratio effects on crack growth rate. (C) 2003 Elsevier Ltd. All rights reserved.
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