Analysis of multiaxial low cycle fatigue of notched specimens for type 316L Stainless Steel under non-proportional loading

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2017
Major/Subject
Mcode
Degree programme
Language
en
Pages
11
79-89
Series
Theoretical and Applied Fracture Mechanics, Volume 89
Abstract
The paper analyzes multiaxial low cycle fatigue tests of notched specimens under proportional and non-proportional loading conditions. Strain controlled multiaxial low cycle fatigue tests were carried out using circumferentially notched round-bar specimens of type 316L stainless steel, with different stress concentration factors. The experimental results show that the crack initiation site is shifted from the notch tip. Based on this finding, a new model for life evaluation is proposed by taking into account the strain gradient in the proximity of the notch tip and the effective maximum strain range. The new model allows evaluating the fatigue life in a narrow scatter band.
Description
Keywords
316L stainless steel, Multiaxial fatigue, Non-proportional loading, Notch
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Citation
Gallo , P , Bressan , S , Morishita , T , Itoh , T & Berto , F 2017 , ' Analysis of multiaxial low cycle fatigue of notched specimens for type 316L Stainless Steel under non-proportional loading ' , Theoretical and Applied Fracture Mechanics , vol. 89 , pp. 79-89 . https://doi.org/10.1016/j.tafmec.2017.01.009