热对流条件下考虑球形夹杂分布的材料热弹接触摩擦热影响分析

机械传动关键活动零部件接触副往往受到力载荷和摩擦热载荷的耦合作用，使得接触界面间的接触力学行为的分析变得极其复杂. 利用基于等效夹杂方法建立的考虑热对流非均质材料热弹接触力学分析模型研究不同摩擦系数、夹杂位置和材料属性等参数对材料表面及内部温升及热应力分布影响规律. 此外，进一步分析了接触副材料中含分布球形夹杂时摩擦热造成的影响. 结果表明:接触副表面温升梯度受热对流系数的影响较大；下表面温升和热应力随摩擦系数增大而增大；分布夹杂则将接触副材料下表面温升及热应力分布变得更为复杂. 

Thermal Effects of Friction on Thermoelastic Contact between Heterogeneous Materials including Spherical Inclusions Considering Surface Heat Convection

Contact pairs of mechanical transmission parts are usually subjected to coupled effects of both mechanical and frictional heating loads, which makes it extremely complicated to analyse mechanical behaviours of contact interface. A thermoelastic contact model considering heat convection of heterogeneous materials was established via equivalent inclusion method (EIM) and utilized to investigate influences of frictional coefficients, inclusion locations and material properties on temperature and thermal stress distributions on the surface or subsurface of material. In addition, thermal effects of friction on contact pairs material with embedded disperse spherical inclusions were analysed. The results show that surface temperature rise of contact pairs was influnced by coefficient of heat convection. Subsurface temperature rise and thermal stress of contact pairs increased as an augment of the friction coefficient. Temperature and thermal stress distributions in contact pairs material involving disperse inclusions were complicated in compared with a single inclusion case.