The effective stress range as a mean stress parameter

This investigation examines the hypothesis that variations in the crack opening stress level of short cracks can account for the observed variations in fatigue strength with mean stress under constant-amplitude cyclic loading. Support for the hypothesis is provided by the experimental data generated...

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Veröffentlicht in:	International journal of fatigue 1992, Vol.14 (1), p.45-50
Hauptverfasser:	DuQuesnay, D.L., Topper, T.H., Yu, M.T., Pompetzki, M.A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences crack closure damage effective stress range Exact sciences and technology Fatigue mean stress Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals. Metallurgy short cracks
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Beschreibung
Zusammenfassung:	This investigation examines the hypothesis that variations in the crack opening stress level of short cracks can account for the observed variations in fatigue strength with mean stress under constant-amplitude cyclic loading. Support for the hypothesis is provided by the experimental data generated for a 2024-T351 aluminium alloy and a SAE 1045 steel. Based on the observed variations in crack opening stress with mean stress an effective stress range is postulated as a mean stress parameter. The effective stress range successfully reduces the fatigue data for all levels of mean stress to a unique fatigue-life curve for each material.
ISSN:	0142-1123 1879-3452
DOI:	10.1016/0142-1123(92)90153-4