装配/残余应力对聚碳酸酯刮擦行为影响的数值研究

聚碳酸酯材料在制备、运输和服役的过程中,不可避免会受到表面刮擦的作用,同时,制造和使用过程中产生的残余应力和装配应力通常会对材料的使用性能产生影响.因此,有必要研究装配应力和残余应力对聚碳酸酯材料表面刮擦行为的影响.将残余刮擦深度、沟槽肩高和刮擦切向力作为聚碳酸酯材料刮擦性能的表征指标,采用有限元数值模拟的方法,系统地研究了不同水平的装配应力和残余应力对聚碳酸酯材料刮擦行为的影响.结果表明,压应力可降低聚碳酸酯表面的残余刮擦深度、沟槽肩高和刮擦切向力.研究表明,可以通过在聚碳酸酯材料表面引入装配/残余压应力来提高其耐刮擦性能.

Numerical Investigation of Effects of Assembly and Residual Stress on Polycarbonate Scratch Behaviors

The scratch of polycarbonate material is inevitably during its manufacture,transportation and usage.Meanwhile,the residual stress and assembly stress,usually have an impact on the material performance.Therefore,it is necessary to investigate their effects on the polycarbonate scratch behavior.In this paper,the residual scratch depth,groove shoulder height and scratch tangential force were chosen as the indicators to characterize the scratch resistance of polycarbonate.The effects of assembly and residual stress on surface scratch of polycarbonate were systematically studied by means of finite element numerical simulation.The results show that the applied compressive stress can reduce the residual scratch depth,the groove shoulder height and scratch tangential force.The research means that the scratch resistance of polycarbonate can be improved by introducing compressive assembly stress and residual stress.