Polar damage sum concept for constant amplitude proportional and nonproportional multiaxial fatigue analysis
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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2021-10
Major/Subject
Mcode
Degree programme
Language
en
Pages
10
Series
Forces in Mechanics, Volume 4
Abstract
This paper proposes a new concept for the evaluation of fatigue damage parameters. It is suggested that evaluation of fatigue damage may not necessarily be confined to a single plane, i.e., a critical plane. Rather, it is suggested here that the culmination of fatigue crack on a particular plane(s) is due to the contributions of damage on all planes. Mathematically, the polar damage sum concept is calculated as the area enclosed by the polar curve of the damage parameter. The proposed concept is examined using multiaxial experimental data for six different alloys. A total of 241 samples are included in this study. Using the proposed concept, fatigue life estimations are improved compared to those obtained from the original critical plane based on Fatemi-Socie and Smith-Watson-Topper models.Description
The authors would like to acknowledge King Fahd University of Petroleum & Minerals (KFUPM) for supporting this work.
Keywords
Polar damage sum, Critical plane, Multiaxial fatigue, Life estimation, Non-proportional loading
Other note
Citation
Albinmousa , J & Al Hussain , M 2021 , ' Polar damage sum concept for constant amplitude proportional and nonproportional multiaxial fatigue analysis ' , Forces in Mechanics , vol. 4 , 100025 . https://doi.org/10.1016/j.finmec.2021.100025
