圆柱壳体冲击平板靶的实验与数值研究  

EXPERIMENTAL AND NUMERICAL STUDY ON THE IMPACT OF A CYLINDRICAL TUBE AGAINST A PLATE

作　　者：吴善幸[1] 陈大年[1,2] 张铎[1] 马东方[2] 金扬辉[2] 王焕然[2] 

机构地区：[1]话北工业大学航天学院,陕西西安710072 [2]宁波大学力学与材料科学研究中心,浙江宁波315211

出　　处：《工程力学》2010年第3期10-14,共5页Engineering Mechanics

基　　金：国家自然科学基金项目(10672082)

摘　　要：利用一级气炮进行了高导无氧铜(OFHC)圆柱壳冲击平板靶实验,对圆柱壳进行回收观测。采用Johnson-Cook(J-C)和Zerilli-Armstrong(Z-A)两种本构模型对实验进行了数值模拟,数值模拟与实验观测的壳体变形比较表明:采用J-C本构模型计算的结果与试验更接近。本构模型的影响是明显的,采用J-C本构模型和Z-A本构模型数值模拟的圆柱壳中的应变、速度以及吸能的历史有较大差异。The impact of a cylindrical tube of oxygen-free high-conductivity（OFHC） copper against a steel plate is carried out on a single gas gun.Shapes of the recovered cylindrical tubes are compared with that numerically simulated by using the Johnson-Cook（J-C） and Zerilli-Armstrong（Z-A） constitutive models,respectively.The experimental deformations of cylindrical tubes are more consistent with the computed by a J-C model than that by a Z-A model.It is indicated that the plastic strain and velocity versus time at characteristic points in the cylindrical tube computed with a J-C constitutive model are rather different from that with a Z-A model.

关 键 词：圆柱壳 平板靶 冲击试验 本构模型 高导无氧铜 

分 类 号：O347.3[理学—固体力学]