Strain-life fatigue predictions for sintered steels with nonzero mean stress |
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Authors: | Ernani S Palma Paulo C Greco Jr |
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Affiliation: | (1) Department of Mechanical Engineering, Catholic University of Minas Gerais - PUC.Minas, Belo Horizonte - MG, Brazil |
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Abstract: | Several approximate models have been utilized for fatigue life prediction. Some of these models are available for mean stress
(or strain) correction on fatigue life, when nonzero mean stress (or strain) is applied. In this paper, the most commonly
used empirical strain-life models for fatigue life predictions, for materials subjected to variable amplitude loads, are described.
Experimental results of fatigue tests, where the specimens of sintered steels were subjected to partial random loads, are
presented and compared with those results obtained theoretically by the models. The utilization of the various models and
their influence on results are discussed. |
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Keywords: | cyclic loads fatigue fatigue life prediction sintered materials strain life |
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