Fatigue Crack Growth in Notched Parts With Compressive Mean Load

[+] Author and Article Information
H. Saal

Institut fur Statik und Stahlbau, Technische Hochschule Darmstadt, Darmstadt, West Germany

J. Basic Eng 94(1), 243-247 (Mar 01, 1972) (5 pages) doi:10.1115/1.3425376 History: Received June 04, 1971; Online October 27, 2010


A fracture mechanics model is proposed to describe fatigue crack propagation in notched specimens. This model accounts for residual stresses which are present at the notch root after unloading from maximum compressive load. This is of particular interest for specimens subjected to compressive mean load. According to the model, cracks will stop growing at the boundary of the plastically deformed zone if the specimen is subjected to compressive load only. Validity of the model was verified with notched specimens of mild steel.

Copyright © 1972 by ASME
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