SYMPOSIA PAPER Published: 01 January 1982
STP28856S

Crack Initiation and Propagation Approaches to Fatigue Analysis

Source

Commonly used analysis methods for predicting “uniaxial” crack initiation and propagation lives in notched structural components are summarized. Experimental trends in the crack initiation and propagation behavior of notched laboratory specimens are presented and discussed in terms of the influence of such factors as notch stress concentration and stress gradient, nature of the loading, residual stress, etc. Conditions for which fatigue life tends to be governed by crack growth considerations are identified. A criterion for nonpropagating cracks is examined. Examples showing how design factors influence the selection of crack initiation or propagation approaches are given. Potential advantages of a better understanding of small crack behavior at notches are noted.

Author Information

Nelson, DV
Stanford University, Stanford, Calif.
Socie, DF
University of Illinois, Urbana, Ill.
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Details
Developed by Committee: E08
Pages: 110–132
DOI: 10.1520/STP28856S
ISBN-EB: 978-0-8031-4826-0
ISBN-13: 978-0-8031-0714-4