Effects of compressive overloads on fatigue crack growth

Hsu, Tzu-Yin Jean; Lassiter, Leslie W

doi:10.2514/6.1974-365

Cited by 8 publications

(1 citation statement)

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“…In [5,6] it was found that the retardation due to a tensile overload is smaller with higher subsequent compressive overloads which can even lead to an acceleration. Some researchers investigated the influence of periodic compressive overloads during constant amplitude loading [7–11], others studied the influence of compressive overload cycles applied before or after a tensile overload [12–16]. To illustrate the acceleration effect due to compressive overloads, most researchers monitored the changes in crack propagation rate, da/dN, after the application of different compression overload cycles [7–16].…”

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confidence: 99%

The Influence of Compressive Loads on Fatigue Crack Propagation in Metals

Lang

Huang

1998

Fatigue Fract Eng Mat Struct

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An experimental study on Al alloy 7475‐T7351 was conducted to determine the influence of compressive loads on fatigue crack propagation. The investigation was based on the determination of the crack propagation stress intensity factor, KPR , under three different basic loading sequences involving compressive loads. The data of the entire experimental program collapse onto a single ‘master curve’ which describes KPR as a function of Kmax and the unloading ratio UR. Load interaction effects are mainly due to the changes of the residual compressive stress state in front of the crack tip, while crack closure plays a minor part. The results give an improved understanding of fatigue crack propagation.

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