Load Interaction Effects In Fatigue Crack Propagation PDF Download

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On Load-interaction Effects in Fatigue Crack Propagation

On Load-interaction Effects in Fatigue Crack Propagation
Author:
Publisher:
Total Pages: 119
Release: 1990
Genre:
ISBN:
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A systematic investigation has been carried out on the mechanisms of the retardation in fatigue crack propagation following either a single overload or a large number of multiple overloads. The results from A1 alloy 6061-T6 and 9Cr-2Mo steel confirmed the observation by Paris and Hermann that during the period of retarded fatigue crack growth subsequent to the application of a single overload, two instead of only one crack opening levels exist.

Fatigue Crack Propagation and Load Interaction Effects in a Titanium Alloy

Fatigue Crack Propagation and Load Interaction Effects in a Titanium Alloy
Author: JM. Larsen
Publisher:
Total Pages: 13
Release: 2000
Genre: Crack closure
ISBN:
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An experimental investigation of load interaction effects in Ti-6Al-2Sn-4Zn-2Mo is presented. Simple variable amplitude loading spectra were applied to test samples, and the crack propagation stress intensity factor, KPR, was subsequently measured. The data were condensed to two equations ("master curves") that describe the influence of an unloading cycle after constant amplitude loading and a single overload cycle, respectively. The results suggest that load interaction effects are caused by residual compressive stresses ahead of the crack front, whereas the influence of crack closure is minor.