Studying on influencing factors of Fretting fatigue life of aluminum alloy

Proceedings of 2011 IEEE International Conference on Intelligence and Security Informatics Pub Date : 2011-07-10 DOI:10.1109/ISI.2011.5984109

Maosheng Yang, Yuquan Bi, Y. Chen, Li Xu

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Abstract

To study the influence factors of aluminum alloy Fretting fatigue life, the global finite element model is employed. The effectiveness of the model is validated according to the comparison of analytical solutions and numerical solutions. A new fretting fatigue life prediction model has been proposed base on friction work. The rationality and effectiveness of the model are validated according to the contrast of experiment life and predicting life. At last influence factor on fretting fatigue life of aerial aluminum alloy LY12CZ is investigated with the model. The results reveal that fretting fatigue life decreases monotonously with the increasing of normal load and then becomes constant at higher pressures. At low normal load, fretting fatigue life increases with the incline of pad radius. At high normal load, however, the fretting fatigue life is unrelated with the fretting pad radius. The bulk stress amplitude has the dominant effect on fretting fatigue life. The fretting fatigue life diminishes as the bulk stress amplitude increases.

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影响铝合金微动疲劳寿命的因素研究

为了研究铝合金微动疲劳寿命的影响因素，采用了全局有限元模型。通过解析解与数值解的比较，验证了模型的有效性。提出了一种基于摩擦功的微动疲劳寿命预测模型。通过实验寿命和预测寿命的对比，验证了模型的合理性和有效性。最后利用该模型对影响航空铝合金LY12CZ微动疲劳寿命的因素进行了研究。结果表明:微动疲劳寿命随法向载荷的增加而单调减小，在较高压力下趋于稳定;在低正常载荷下，微动疲劳寿命随着垫块半径的倾斜而增加。在高正常载荷下，微动疲劳寿命与微动垫半径无关。体应力幅值对微动疲劳寿命有主导影响。微动疲劳寿命随着体应力幅值的增大而减小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of 2011 IEEE International Conference on Intelligence and Security Informatics

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