随机短纤维复合材料层与刚性平面的滚动接触特性研究

Research on Rolling Contact Behavior of Short Fiber Reinforced Polymer Layer with Rigid Plane

借助于Eshelby等效包容理论及粘弹性基础假设,对随机短纤维增强复合材料层与刚性平面的滚动接触问题进行了理论研究,分析了短纤维长径比和体积分数对滚动接触特性的影响,数值结果表明,滚动接触宽度和滚动摩擦系数均随纤维长径比和体积分数的增大而减小;等效接触应力分布不对称,最大等效接触应力随着纤维长径比和体积分数的增大而增大;在任意纤维体积分数和长径比下,滚动摩擦系数受转速影响较大,而滚动接触宽度更取决于载荷。

Based on Eshelby equivalent inclusion method and hypothesis of visco-elastic layer, rolling contact behavior of random short fiber reinforced polymer layer （RSFRP） with rigid plane was theoretically investigated. The effects of short fiber length and volume fraction on contact behavior were discussed. The numerical results reveal that rolling contact width as well as rolling friction coefficient decreases with the increase of fiber length-diameter ratio and volume fraction. Moreover, the contact stress distribution is asymmetric, and the maximum contact stress grows with the increasing fiber length-diameter ratio and volume fraction. Under a constant RSFRP material constitution, rolling speed has a predominant effect on the rolling friction coefficient, while the contact width depends mainly on load.