SYMPOSIA PAPER Published: 28 August 2014
STP157120130115

Constant-Amplitude Versus K-Control in Fatigue Crack Growth Rate Testing

Source

This study compared K-control to constant-amplitude fatigue crack growth rate testing to determine under what conditions K-control testing should be used for K-increasing tests. The results showed that there is no significant difference between the data generated from constant-amplitude and K-control testing for compact–tension specimens when the normalized K-gradient ranged from 1.65 to 5.00 (1/in.) and test time was improved by as much as 70 % for the K-control tests. In most cases, and especially for small test specimens, K-Control K-increasing tests are recommended as a more efficient alternative to constant-amplitude testing.

Author Information

Adler, Matthew, A.
Westmoreland Mechanical Testing & Research, Inc., Youngstown, PA, US
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Details
Developed by Committee: E08
Pages: 1–17
DOI: 10.1520/STP157120130115
ISBN-EB: 978-0-8031-7588-4
ISBN-13: 978-0-8031-7587-7