Nonlinear cumulative damage model for multiaxial fatigue |
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Authors: | Shang De-guang Sun Guo-qin Deng Jing and Yan Chu-liang |
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Affiliation: | (1) College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing, 100022, China |
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Abstract: | On the basis of the continuum fatigue damage theory, a nonlinear uniaxial fatigue cumulative damage model is first proposed.
In order to describe multiaxial fatigue damage characteristics, a nonlinear multiaxial fatigue cumulative damage model is
developed based on the critical plane approach. The proposed model can consider the multiaxial fatigue limit, mean hydrostatic
pressure and the unseparated characteristic for the damage variables and loading parameters. The recurrence formula of fatigue
damage model was derived under multilevel loading, which is used to predict multiaxial fatigue life. The results showed that
the proposed nonlinear multiaxial fatigue cumulative damage model is better than Miner’s rule. |
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Keywords: | multiaxial fatigue fatigue damage nonproportional loading life prediction |
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