考虑摩擦切向力的弹塑性粗糙表面接触模型

发布时间：2018-05-05 07:15

本文选题：粗糙面 + 摩擦切向力　；参考：《润滑与密封》2017年08期

【摘要】：基于接触微凸体由弹性变形向弹塑性变形及最终向完全塑性变形的转化皆是连续和光滑的假设,提出一种综合考虑弹塑性变形以及摩擦切向力等因素的新型粗糙表面接触模型。通过分析不同塑性指数以及载荷条件下该模型与ZMC模型以及GW模型预测。结果发现:在低塑性指数、小法向接触载荷情况下,该模型预测的真实接触面积相比ZMC模型偏小,甚至比GW模型预测的真实接触面积偏小,但是随着法向接触载荷的增加,该模型预测的真实接触面积逐渐增大,并超过ZMC模型以及GW模型预测结果;在高塑性指数下,该模型预测的真实接触面积即使在小法向接触载荷情况下也相比ZMC模型以及GW模型预测的真实接触面积大,且随着载荷的增加,真实面积之间的差距也逐渐增大;随着塑性指数的增加,该模型预测的真实面积超过GW模型以及ZMC模型预测值的临界载荷逐渐减小。
[Abstract]:Based on the assumption that the transformation of contact microconvex from elastic deformation to elastoplastic deformation and eventually to complete plastic deformation is continuous and smooth, a new contact model of rough surface is proposed, which considers the factors of elastic-plastic deformation and friction tangential force. The prediction of this model, ZMC model and GW model under different plastic exponents and loads is analyzed. The results show that under the condition of low plastic index and small normal contact load, the actual contact area predicted by this model is smaller than that predicted by ZMC model, even smaller than that predicted by GW model, but with the increase of normal contact load, the actual contact area predicted by this model is smaller than that predicted by GW model. The real contact area predicted by this model increases gradually and exceeds the predicted results of ZMC model and GW model. The real contact area predicted by this model is larger than that predicted by ZMC model and GW model even in the case of small normal contact load, and the gap between real area increases with the increase of load. With the increase of plasticity exponent, the critical load of the real area predicted by this model exceeds the predicted value of GW model and ZMC model gradually decreases.
【作者单位】：江南大学机械工程学院;
【基金】：国家自然科学基金项目(51675232) 中央高校基本科研业务费专项资金项目(JUDCF13028) 江苏省博士后科学基金项目(1002028C) 中国博士后科学基金项目(20110491366)
【分类号】：TH117.1

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