Effect of Multiple Overloads on Fatigue Crack Propagation in 2024-T3 Aluminum Alloy

V. Trebules; R. Roberts; R. Hertzberg

doi:10.1520/STP49719S

SYMPOSIA PAPER Published: 01 January 1973

STP49719S

Effect of Multiple Overloads on Fatigue Crack Propagation in 2024-T3 Aluminum Alloy

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The effect of multiple overloads on subsequent fatigue crack propagation in 2024-T3 aluminum alloy specimens was studied, and 1, 2, 10, 100, 1000, and 5000 overload cycle tests were run. Typical tests consisted of running constant ΔK tests where Δ K = 15 ksi in . ( 16.5 M N / m 3 / 2 ) and λ = 1.05 ( λ = K max / Δ K ) . The maximum overload level was 50 percent ΔK or K max = 22.5 ksi in . ( 24.7 M N / m 3 / 2 ) . The usefulness of closure concepts in aiding the understanding of fatigue crack propagation due to overloads is considered. Evidence is given to demonstrate the general applicability of closure concepts for analysis of fatigue crack propagation results.

Author Information

Trebules, V., W.

Atomic Energy Commission, Pittsburgh, Pa

Roberts, R.

Lehigh University, Bethlehem, Pa.

Hertzberg, R., W.

Lehigh University, Bethlehem, Pa.

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Details

Developed by Committee: E08

Pages: 115–146

DOI: 10.1520/STP49719S

ISBN-EB: 978-0-8031-8151-9

ISBN-13: 978-0-8031-6660-8

Effect of Multiple Overloads on Fatigue Crack Propagation in 2024-T3 Aluminum Alloy

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