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Probabilistic Model of Mean Stress Effects in Strain-Life Fatigue
Author(s) -
Nicole Apetre,
Attilio Arcari,
Norman E. Dowling,
Nagaraja Iyyer,
Nam Phan
Publication year - 2015
Publication title -
procedia engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.32
H-Index - 74
ISSN - 1877-7058
DOI - 10.1016/j.proeng.2015.08.103
Subject(s) - probabilistic logic , stress (linguistics) , structural engineering , low cycle fatigue , engineering , materials science , statistics , mathematics , philosophy , linguistics
This paper proposes a modification of the Walker model to account for the mean stress effect on fatigue life of structures and the associated scatter of experimental data. To account for various sources of uncertainty, a framework which permits dealing with run-outs and provides an analytical probabilistic definition of the whole strain-life field, both in the low-cycle and high-cycle fatigue regions is used. The proposed model is an improvement relative to the Smith-Watson-Topper model for materials that are significantly more or less sensitive to mean stress. Model's applicability is shown for various metals

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