A selection criterion of small load truncation level based on the principle of same distribution of fatigue life
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Published:2023-06-21
Issue:9
Volume:46
Page:3360-3371
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ISSN:8756-758X
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Container-title:Fatigue & Fracture of Engineering Materials & Structures
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language:en
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Short-container-title:Fatigue Fract Eng Mat Struct
Author:
Cao Jing1ORCID,
Yao Weixing12
Affiliation:
1. State Key Laboratory of Mechanics and Controlfor Aerospace Structures Nanjing University of Aeronautics and Astronautics Nanjing China
2. Key Laboratory of Fundamental Science for National Defense‐Advanced Design Technology of Flight Vehicle Nanjing University of Aeronautics and Astronautics Nanjing China
Abstract
AbstractA new criterion of selecting the small load truncation level for simplification of fatigue test spectrum was developed, which is based on the principle that the truncated spectrum has the same fatigue life distribution as the original spectrum. Considering the influence of uncertainties of material fatigue performance and load spectrum on the fatigue life distribution, the relation between the distribution difference and the small load truncation level was established. According to the designed tolerance value of distribution difference, the appropriate small load truncation level could be determined accordingly. The selection criterion was verified by the fatigue tests of LC4CS aluminum alloy smooth sheet specimens. The results show that good simplification effect of spectrum can be achieved based on the criterion.
Funder
National Natural Science Foundation of China
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
2 articles.
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