基于Archard磨损模型研究SiC/AZ91D复合材料干摩擦磨损特性  

Research on dry friction and wear characteristics of SiC/AZ91D composites based on Archard wear mode

作　　者：付豪 尧军平[1] 梁超群 李步炜 陈国鑫 FU Hao;YAO Junping;LIANG Chaoqun;LI Buwei;CHEN Guoxin(School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学航空制造工程学院,南昌330063

出　　处：《复合材料学报》2024年第11期6206-6214,共9页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(52065046,51661024);江西省科技重点研发计划(20202BBEL53024);研究生创新专项资金项目(2030009101050)。

摘　　要：颗粒增强镁基复合材料在活塞制造中具有重要意义,活塞使用寿命与其材料的摩擦磨损性能关系密切,为预测镁基复合材料活塞耐磨性。基于Archard磨损模型结合自适应网格技术,建立SiC/AZ91D镁基复合材料及其基体有限元模型,探究其在不同载荷下的磨损行为,考察其应力场分布、磨损深度,进行了试验验证,揭示磨损机制。结果表明:在不同载荷下,盘销的接触面均表现出距盘轴心最近与最远处应力值较大,其他径向区域较小。随着载荷增加,盘销接触区域各处均表现出应力值增大。在不同载荷下,盘销接触面均表现出距盘轴心最近处磨损深度较小,离盘轴心径向距离增加,磨损深度越来越大。随着载荷增加,盘销接触区域各处均表现出磨损深度数值增大。但复合材料的磨损深度小于基体,表现出较好的耐磨性能。磨粒磨损和剥层磨损为复合材料主要磨损机制,粘着磨损为基体合金的主要磨损机制,模拟结果与试验结果吻合较好。The particle reinforced magnesium matrix composite is of great significance in the manufacture of piston.The service life of piston is closely related to the friction and wear properties of the material,so it can predict the wear resistance of magnesium matrix composite piston.Based on Archard wear model and adaptive mesh technology,a finite element model of SiC/AZ91D magnesium matrix composite and its matrix was established to explore its wear behavior under different loads,investigate its stress field distribution and wear depth,and conduct experimental verification to reveal the wear mechanism.The results show that,under different loads,the stress values of the nearest and furthest distance from the disc axis are larger on the contact surface of the disc pin,while other radial regions are smaller.With the increase of load,the stress values in all parts of the disc and pin contact area increase.Under different loads,the wear depth of the contact surface of the disc pin is smaller at the closest point to the disc axis,and the wear depth is larger and larger with the increase of the radial distance from the disc axis.With the increase of load,the wear depth increases in all parts of the disc and pin contact area.However,the wear depth of the composite is less than that of the matrix,which shows better wear resistance.Abrasive wear and peeling wear are the main wear mechanisms of the composite,adhesive wear is the main wear mechanism of the matrix alloy,and the simulation results are in good agreement with the experimental results.

关 键 词：镁基复合材料 有限元模拟 摩擦磨损 Archard磨损模型 磨损机制 

分 类 号：TB333[一般工业技术—材料科学与工程]