冲击压缩下铝、铜、钨的剪切模量和屈服强度与压力和温度的相关性  

Pressure and temperature dependence of shear modulus and yield strength for aluminum, copper and tungsten under shock compression

作　　者：彭建祥[1] 经福谦[1] 王礼立[2] 李大红[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波物理实验室,绵阳621900 [2]宁波大学力学与材料科学研究中心,宁波315211

出　　处：《物理学报》2005年第5期2194-2197,共4页Acta Physica Sinica

基　　金：中国工程物理研究院科学技术基金 (批准号 :2 0 0 2 0 10 1)资助的课题 .~~

摘　　要：对铝、铜和钨在冲击压缩状态下的剪切模量和屈服强度的实验数据进行了综合分析 ,并与Steinberg Cochran Guinan(SCG)模型的计算结果进行了比较 ,结果表明 ,铝在 5 0GPa、铜在 10 0GPa、钨在 2 0 0GPa冲击压力以内 ,三种材料的剪切模量和屈服强度随温度和压力的变化趋势基本相似 ,即SCG模型的假设 Y′pY0=G′pG0,Y′TY0=G′TG0对这三种材料在上述冲击压力范围内近似成立 ,利用该模型可以较好地描述材料在冲击压缩下的本构行为 .Experimental data of shear modulus and yield strength of shocked aluminum, copper and tungsten were analyzed systematically. Comparison between these data and the results calculated by using SCG ( Steinberg-Cochran-Guinan) constitutive model (J. Appl. Phys. 51 ( 3) : 1498) shows that shear modulus and yield strength have similar dependence on pressure and temperature under conditions for aluminum below 50 GPa, copper below 100 GPa and tungsten below 200 GPa shock pressures. So the assumptions in the SCG model, Y'(p)/Y-0 = G'(p)/G(0), Y'(T)/Y-0 = G'(T)/G(0), approximately correct in these pressure ranges, and the SCG model can be used to describe the shear modulus and yield strength of these metals at high shock pressure and high temperature.

关 键 词：剪切模量 屈服强度 铜 钨 平面冲击压缩 铝 

分 类 号：TG115.5[金属学及工艺—物理冶金]