Effect of Mean Stress Intensity on Fatigue Crack Growth in a 5456-H117 Aluminum Alloy

HP Chu

doi:10.1520/STP38603S

SYMPOSIA PAPER Published: 01 January 1974

STP38603S

Effect of Mean Stress Intensity on Fatigue Crack Growth in a 5456-H117 Aluminum Alloy

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Fatigue crack growth data on a 5456-H117 aluminum alloy have been obtained by testing compact tension and contoured double cantilever beam specimens. The effect of tensile mean stress on crack growth rate is found to reach a maximum when stress ratio R ⩾ 0.25. The crack propagation laws are discussed and two new equations are developed. It is shown that the new equations can represent the entire range of fatigue crack growth rate versus applied stress intensity for different R values from fatigue threshold to unstable crack propagation.

Author Information

Chu, HP

Naval Ship Research and Development Center, Annapolis, Md.

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Details

Developed by Committee: E08

Pages: 245–263

DOI: 10.1520/STP38603S

ISBN-EB: 978-0-8031-5583-1

ISBN-13: 978-0-8031-0367-2

Effect of Mean Stress Intensity on Fatigue Crack Growth in a 5456-H117 Aluminum Alloy

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