高温自润滑包覆体胞热驱模型的研究

根据金属基粉末冶金自润滑材料的微结构特点，建立了自润滑材料的包覆体胞单元模型，并基于所建立的体胞单元模型，对摩擦热一应力耦合场中包覆体胞单元模型的自润滑机理进行了数值模拟研究，分析了摩擦系数、包覆体材料强度及孔隙度等参数对体胞单元包覆核材料驱动作用的影响。结果表明：在其他条件不变的情况下，包覆核材料向包覆体外的排出量随着摩擦系数、包覆体材料的强度、孔隙度的上升而增加。

A Study for the Heat-driving Mechanism of Self-lubricating Covered Model at Elevated Temperature

A new covered model was developed for analyzing self-lubricating mechanism of sweat gland micro-pores at high temperature.In the model,the frictional heat and the thermal stress coupled field were simulated by a numerical method.Research showed that the driving force of the covered lubricating material was produced by the effect of frictional heat-thermal stress.The influence of the friction coefficient change on the diffusion of lubricating elements was also discussed.The inner and outer layers characteristics of the covered model were also investigated in the paper.