复杂环境下曲面接触扭转微动磨损机理研究

项目名称： 复杂环境下曲面接触扭转微动磨损机理研究

项目编号： No.U1530136

项目类型： 联合基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 蔡振兵

作者单位： 西南交通大学

项目金额： 64万元

中文摘要： 扭转微动损伤广泛存在于有回转相对运动的摩擦副中，它导致零部件磨损或局部疲劳裂纹萌生与扩展，使服役寿命大为降低，如大量的医学植入器件、核能装置、海洋工程装备、武器装备等领域失效案例。目前相关研究鲜见，急需开展扭转微动磨损机理及其控制方法的研究。本研究拟采用数值模拟与试验相结合的方法，研制新型高温真空扭转微动磨损试验装置，实现曲面配合条件下的扭转微动；模拟各种复杂实验条件，揭示不同倾斜角、角位移、应力水平、温度、氧化气氛条件下的损伤机理和影响因素。重点考察其摩擦氧化和第三体行为，建立扭转微动磨损的理论模型，提出扭转微动磨损损伤防护准则。并运用摩擦学设计思想，通过改变界面接触方式、材料性质、设计表面织构，改变材料匹配等手段探讨减缓扭转微动损伤的途径，为减缓曲面发生微动磨损破坏提供理论支持和技术参考。

中文关键词： 结构与性能；可靠性；功能材料

英文摘要： The damage induced by dual-rotary fretting are presented in a large number tribo-pairs which have rotary relative motion. Dual-rotary fretting causes local fatigue crack initiation in some parts, and the service life is greatly reduced. A great deal of failure cases e.g. medical implant devices, nuclear power equipment, marine engineering equipment and weapon equipment system indicated that the dual-rotary fretting is one of the main cause. The related research is rare, and there is an urgent need for the research of the mechanism and control method of the dual-rotary fretting wear. This study will combine the numerical simulation and experiment method. A new fretting test device will be designed and manufactured, and it can realize the dual-rotary fretting under curved surface contact model in many complex environment. We will simulate complex experimental conditions (e.g. high temperature, vacuum), and reveal the damage influencing factors from angular displacement, stress level, temperature, medium environment, oxidation atmosphere. The friction oxidation and the third body behavior will be explored, and a theory model of dual-rotary fretting wear and it’s protection criterion will be established. The tribology design thought will be considered, which through changing the interface contact mode, material properties, design of surface texture, etc. This study will build a method to slow down the fretting damage occurred in curved surface. And the research results will provide theoretical support and technical reference.

英文关键词： Structure and property;Reliability;Functional materials