ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 2

Effect of Specimen Thickness on Delay in Fatigue Crack Growth

Shih, TT
Research assistant and professor of mechanicsmember of ASTM, Lehigh University, Bethlehem, Pa.

Wei, RP
Research assistant and professor of mechanicsmember of ASTM, Lehigh University, Bethlehem, Pa.

Abstract

The effect of specimen thickness on delay in fatigue crack growth, produced by load interactions in variable-amplitude loading, was examined. Experiments were carried out on 7075-T6 aluminum alloy sheets. The results indicate that delay is a function of specimen thickness. This influence of thickness, along with variations in behavior among different materials, suggest that extensive extrapolation of existing data should not be made.

Keywords:
fatigue (materials), crack propagation, thickness, aluminum alloys, load interaction effects, fracture mechanics

Paper ID: JTE10131J
DOI: 10.1520/JTE10131J
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