SYMPOSIA PAPER Published: 01 January 1981
STP33449S

Development of a Proposed ASTM Standard Test Method for Near-Threshold Fatigue Crack Growth Rate Measurement

Source

Results are summarized which provide the basis for development of the proposed ASTM standard test method for measuring and presenting very slow cyclic rates of fatigue crack propagation. The technique for obtaining very slow rate data as K decreases with crack extension is described. Data are reviewed that show the individual and combined effects of various precracking and testing procedures, loading rates, and other testing parameters. The data are used to demonstrate the utility of the method and its limitations. Guidelines are given for the minimization of transient growth rate processes which can confound interpretation of the data. Analytical procedures for fitting near-threshold data are also discussed.

Author Information

Bucci, RJ
Alcoa Laboratories, Alcoa Center, Pa.
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Details
Developed by Committee: E08
Pages: 5–28
DOI: 10.1520/STP33449S
ISBN-EB: 978-0-8031-4804-8
ISBN-13: 978-0-8031-0717-5