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Fully reversed uniaxial strain controlled fatigue tests were performed on smooth cylindrical specimens made of 304 stainless steel. Fatigue life data and cracking observations for uniaxial tests were compared with life data and cracking behavior observed in fully reversed torsional tests. It was determined that the product of maximum principle strain amplitude and maximum principle stress provided the best correlation of fatigue lives for these two loading conditions. Implementation of this parameter is in agreement with observed physical damage and it accounts for the variation of stress-strain response, which is unique to specific loading conditions. Biaxial fatigue tests were conducted on tubular specimens employing both in-phase and out-of-phase tension torsion cyclic strain paths. Cracking observations indicated that the physical damage which occurred in the biaxial tests was similar to the damage observed in uniaxial and torsional tests. The Smith, Watson, and Topper parameter was then extended to predict the fatigue lives resulting from the more complex loading conditions. Jones, David J. and Kurath, Peter Unspecified Center CRACK INITIATION; CYCLIC LOADS; FATIGUE LIFE; METAL FATIGUE; S-N DIAGRAMS; AXIAL STRAIN; DAMAGE; FATIGUE TESTS; STAINLESS STEELS; STRESS-STRAIN RELATIONSHIPS...

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9781722981044

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