| Citation: | LIU Tianqi, SHI Xinhong, ZHANG Jianyu, et al. Comparative study of variable amplitude multiaxial fatigue life analysis methods[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(10): 2176-2184. doi: 10.13700/j.bh.1001-5965.2017.0782(in Chinese)
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Three commonly used variable amplitude multiaxial fatigue life analysis methods, including Bannantine-Socie method, Wang-Brown method and Wang L-Wang D J method are reviewed briefly based on the current researches on variable amplitude multiaxial fatigue. Then, the algorithms of the three methods were introduced and calculated codes were written. Finally, the fatigue life of an aircraft structural component, which is subjected to complex variable amplitude multiaxial stress state during their service, was evaluated using the three multiaxial fatigue life analysis methods. In addition, uniaxial fatigue life was analyzed using the Manson-Coffin equation to compare the effect of multiaxial fatigue loading on the fatigue life of the structure. The comparison results are as follows:the estimated result of Wang-Brown method is reasonable, the Wang L-Wang D J method gives a conservative prediction result, the prediction result of Bannantine-Socie method is greater than that of the other two methods, while the uniaxial fatigue life analysis method gives more dangerous prediction result.
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