【摘要】 针对运载发射阶段卫星锁轴机构45%SiC_p/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%SiC_p/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%SiC_p/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。更多还原

【Abstract】 In order to verify the potential problem of fretting wear and tangential contact stiffness between 45%SiC_p/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%SiC_p/Al test sample is carried out before and after vibration experiments. The experimental result shows 45%SiC_p/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.更多还原