中文摘要：

将工程粗糙表面接触简化为一具有三维分形特性的弹塑性粗糙表面与一理想平面的接触,在考虑接触体的热力耦合、微凸体间的相互作用和摩擦界面摩擦热流耦合等影响下,运用有限元法数值模拟并比较分析了滑动摩擦过程中粗糙面/平面接触不同变形特性对粗糙面VonMises应力的影响.发现在匀速滑动摩擦过程中,粗糙表面VonMises等效应力场分布极不均匀,微凸体接触区域中心VonMises等效应力值较大.当摩擦副发生相对滑动时,粗糙表面各接触区域的VonMises等效应力值变大,且平面配副变形越小,粗糙面接触区的VonMises等效应力越大.而在摩擦接触界面闪点温度形成时,热膨胀使得此时粗糙表面的VonMises等效应力值有所下降.

英文摘要：

A thermo-mechanical coupling model for a flat plane and an elasto-plastic rough surface based on 3D fractal theory was established.The model considered the interaction between asperities,and integrated the heat flux coupling between the sliding surfaces.To obtain the distribution of the VonMises equivalent stress under the different solid body contact deformation property during the sliding process,the thermo-mechanical problem under this 3D model was solved by the finite element method.The numerical results from the analysis and simulation showed that the distribution of VonMises equivalent stress was very uneven.The VonMises equivalent stress located in the middle of the local contact region was large.The VonMises equivalent stress on local contact region increased while the relative sliding happened,and it becam larger with the deformation of the plane pair decreasing.But when the ＂hot spotting＂ on the frictional interface came into being,the VonMises equivalent stress decreased because of the local thermal expansion.