45% SiCp/Al复合材料的微动磨损试验设计与验证

针对运载发射阶段卫星锁轴机构45%SiCp/Al复合材料与TC4材料之间可能存在的微动摩擦磨损与切向接触刚度问题，本文在调研和仿真分析的基础上，设计等效的扫频微动摩擦磨损试验系统。通过夹持力的标定保证最大影响因素接触应力的一致，采用扫频振动模拟摩擦副受载工况，并对45%SiCp/Al复合材料试件表面形貌进行振前振后检测。试验结果表明，45%SiCp/Al复合材料在较高的形状精度和表面粗糙度条件下，能够承受较大载荷的微动摩擦，摩擦副结合面具有良好的切向接触刚度。

Experiment Design and Verification of Fretting Wear of 45% SiCp/Al Composites

In order to verify the potential problem of fretting wear and tangential contact stiffness between 45%SiCp/Al composites and TC4 for a satellite locking mechanism during launch, an equivalent sweep frequency fretting wear test system is designed based on investigation and simulation in this paper. To ensure the consistency of major factor contact stress, the holding force is calibrated firstly; the load condition of friction pair is simulated by sweep vibration, and the surface measurement of 45%SiCp/Al test sample is carried out before and after vibration experiments. The experimental result shows 45%SiCp/Al can bear relatively large load fretting wear with higher shape precision and surface roughness, and the joint surface of friction pair has good tangential contact stiffness.