飞片温升对Hugoniot参数测量的影响  

Effect of the Preheated Flyer on Hugoniot Measurements

作　　者：王青松[1] 蓝强[1] 戴诚达[1] 

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室,四川绵阳621900

出　　处：《高压物理学报》2007年第4期439-443,共5页Chinese Journal of High Pressure Physics

摘　　要：在格临爱森物态方程框架内建立了一种估算高温材料Hugoniot参数的理论方法,这种方法计算简单,原则上适用于各种固体材料,弥补了BACT方法的缺点。结合一些Hugoniot实验数据研究了实验中飞片的温升对粒子速度的影响。数值计算表明:飞片温升对粒子速度造成的不确定度非常小,因此在数据处理中,假定飞片的Hugoniot参数不变是合理的。A theoretical method was proposed to evaluate the Hugoniot parameters of the preheated metals based on Grtineisen equation of state. This method offsets some disadvantages of BACT and can be used to estimate Hugoniot parameters of all kinds of solids with preheating in principle. This method was applied to calculate the Hugoniot parameters for A1 and TC4 at different initial temperatures up to 1 200 K and compared the obtained results with the available data reported in literature. It is shown that the moderate preheating of metal does not result in an obvious deviation from its principal Hugoniot. Thus the rough treatment in hypervelocity impact experiments that the Hugoniot of preheated flyer is approximated to be the principal Hugoniot is reasonable.

关 键 词：飞片温升 Grtineisen物态方程 HUGONIOT 

分 类 号：O347.1[理学—固体力学]