SYMPOSIA PAPER Published: 01 January 1983
STP44809S

Influence of Environment and Specimen Thickness on Fatigue Crack Growth Data Correlation by Means of Elber-Type Equations

Source

The effects of environment and specimen thickness on crack closure in 2024 aluminum alloy were investigated by using constant-amplitude fatigue tests. Crack growth rates for all test conditions were correlated with ΔKeff values derived from equations based on the crack closure theory of Elber. Crack closure behavior was confirmed to be independent of environment, except for a small deviation ascribed to corrosion product wedging. Surprisingly, the Elber-type equations worked equally well for all specimen thicknesses; a possible explanation is offered. These results have important implications with respect to fatigue crack growth prediction models based on crack closure effects.

Author Information

Ewalds, HL
Delft University of Technology, Delft, The Netherlands
van Doorn, FC
Delft University of Technology, Delft, The Netherlands
Sloof, WG
Delft University of Technology, Delft, The Netherlands
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Details
Developed by Committee: E08
Pages: 115–134
DOI: 10.1520/STP44809S
ISBN-EB: 978-0-8031-4867-3
ISBN-13: 978-0-8031-0245-3