Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 28, Issue 5-6, Pages 592-597Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2005.05.013
Keywords
fatigue strength; combined axial and torsional loading; criterion for fatigue failure; phase differences; short fatigue cracks
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A criterion is presented for the prediction of the fatigue strength of defect-containing specimens subjected to combined axial and torsional loading at an R of - 1. The criterion is applicable to loading situations where there is an arbitrary phase difference between the axial and torsional loadings. In order to check on the validity of the criterion, fatigue tests were performed using specimens of annealed carbon steel as well as of heat-treated alloy steel. The specimens contained a surface hole, which was either 100 or 500 mu m in diameter. Good agreement between predictions and experimental results was obtained for both in-phase and out-of-phase loadings. (c) 2005 Elsevier Ltd. All rights reserved.
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