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以ABAQUS有限元分析软件为工具,通过计算接触面上的接触应力p(x)及切向应力τ分布,求得了Ruiz微动损伤参数k2(x),并以此为基础,建立了一种微动疲劳寿命预测模型,经验证该模型预测值与实验值比较吻合,证明了该模型的合理、有效性。利用所得模型,研究了3种参数变化对微动疲劳寿命的影响,结果表明:在其他参数保持不变的情况下,随着接触压力的增加,微动疲劳寿命迅速下降,在达到一个最低值后,随着压力的增加寿命反而增加;微动疲劳寿命随轴向应力增加而下降;对于较低的接触压力,寿命随压头半径的增加而增加,但在较高的接触压力下,随着压头半径的变化寿命几乎保持不变。
Using ABAQUS finite element analysis software as a tool, the Ruiz fretting damage parameter k2 (x) was calculated by calculating the contact stress p (x) and the tangential stress τ distribution on the contact surface. Based on this, a Fretting fatigue life prediction model, the model predictions and experimental values are more consistent, proving the model is reasonable and effective. The effects of three parameters on the fretting fatigue life are studied using the model. The results show that the fretting fatigue life decreases rapidly with the increase of the contact pressure, while the other parameters remain the same. At a minimum value , The life expectancy increases with the increase of pressure; the fretting fatigue life decreases with the increase of axial stress; for lower contact pressure, life increases with the increase of head radius, but with higher contact pressure, with The life of the pressure head changes almost unchanged.