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A model for fatigue crack growth with a variable stress intensity factor

โœ Scribed by Donald C. Stouffer; John F. Williams

Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
832 KB
Volume
11
Category
Article
ISSN
0013-7944

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โœฆ Synopsis

AlMsnct-A model for fatigue crack growth, similar to that of Majumdar and Morrow, is proposed where the ' crack growth rate is determined from the iow cycle fatigue and cyclic strcss~train response of tbc material. The model is for a constant stress range at infinity, but does allow for a v&able stress intensity factor due to the changing crack length. The study also includes an analysis of the strain range in the neighborhood of the crack tip. Further it is shown that the model predicts the critical strass intensity factor. A prediction of the crack growth rata is made for 2024-T351 aluminium, coppar and CW5.3 AL alloy and is compared to the experimental observations.

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