固体材料在高速液体撞击下的表面损伤研究  

Research on Surface Damage of Solid Material Subjected to High Speed Liquid Impact

作　　者：谢永慧[1] 汪勇[1] 陈建辉[1] 张荻[1] 

机构地区：[1]西安交通大学多相流国家重点实验室,陕西西安710049

出　　处：《兵工学报》2009年第S2期139-144,共6页Acta Armamentarii

基　　金：科技部863计划专题项目(2009AA04Z102);教育部新世纪优秀人才支持计划项目(NCET-07-0682)

摘　　要：为获得材料在高速液体撞击下的表面损伤过程,本文从数值和实验两方面进行了研究。利用光滑粒子流体动力学和有限元耦合方法计算了高速液固撞击时产生的材料表面损伤。分析了有机玻璃和钢材在液滴打击下的状况,获得了液滴撞击下材料内部的应力应变过程。同时,建立了高速射流冲击固体材料的试验平台,利用高速数码摄影系统得到了撞击时的射流速度。采用三维超景深数码显微系统对高达600 m/s的射流撞击钢材时产生的表面损伤进行了研究,得到了三维凹坑深度及尺寸数据,并对试验结果进行了详细的统计分析。根据分析和统计结果,对几种钢材料抵抗液体撞击的性能进行了评估。In order to study the surface damage of solid material subjected to the high speed liquid impact,both numerical and experimental methods were established.The smoothed particle hydrodynamics and finite element analysis were used to calculate the material damage.The conditions of PMMA and steel were analyzed to obtain the dynamic stress and strain distribution during impact.An experiment apparatus was build.The velocity of the impact jet was measured using a high speed camera and the apparatus.A digital microscope was used to measure the three dimensional profile of the sample before and after high speed liquid impact up to 600 m/s.The dimensions of damage area were recorded and analyzed statistically.Based on the statistical results,the performance of the materials resisting liquid corrosion was evaluated.

关 键 词：液固撞击 材料表面损伤 光滑粒子流体动力学 数值研究 实验研究 

分 类 号：O35[理学—流体力学]