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微动磨损主要是由物理量纲不同的材料弹塑性和摩擦化学反应所决定的复合磨损 ,尚无普遍认可的理论模型。文中用非平衡态热力学描述摩擦接触下的耗散过程 ,以熵平衡关系和非平衡过程的稳定性分析为基础建立微动摩擦体系的热力学模型。分析摩擦磨损中热传导、粘滞性流动、扩散和化学反应的熵产生变化 ,提出以材料粘滞性流动和摩擦化学反应为主的简化模型。根据对简化模型的分析 ,设计了面 -面接触的验证实验 ,并预测磨损痕迹会随微动幅度变化而改变 ,磨损区材料化学成分亦会随位置不同而变化。在 SRV微动摩擦磨损试验机上完成的实验证实了所作的预测
Fretting wear is mainly composed of different physical dimension material elastoplastic and tribochemical reaction determined by the composite wear, there is no universally accepted theoretical model. In this paper, the non-equilibrium thermodynamics is used to describe the dissipative process under frictional contact. The thermodynamic model of the fretting friction system is established based on the entropy equilibrium and the stability analysis of the non-equilibrium process. The heat transfer, viscous flow, diffusion and the entropy change of chemical reaction in the friction and wear are analyzed. A simplified model of material viscosity flow and tribochemical reaction is proposed. Based on the analysis of the simplified model, the surface-to-surface contact verification experiment was designed and the wear marks were predicted to change with the fretting amplitude. The chemical composition of the wear area also changed with the location. The experiments done on the SRV fretting wear tester confirmed the predictions