Nonlinear cumulative damage model for multiaxial fatigue

2006年第1卷第3期

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《机械工程前沿（英文）》 >> 2006年第1卷第3期 doi: 10.1007/s11465-006-0035-x

Nonlinear cumulative damage model for multiaxial fatigue

College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100022, China

发布日期： 2006-09-05

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摘要

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.