多孔钛材料的动态力学响应研究  

Dynamic Mechanical Response of Cellular Titanium Material

作　　者：王婧[1] 任会兰[1] 郝莉[2] 宁建国[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]北京建筑大学理学院,北京100044

出　　处：《材料工程》2015年第9期87-93,共7页Journal of Materials Engineering

基　　金：教育部高等学校博士学科点专项科研基金资助项目(20131101110013);国家自然科学基金资助项目(11172045)

摘　　要：通过一级轻气炮加载,对孔洞具有一定规律的多孔钛材料进行了平板撞击实验及数值研究。基于锰铜压阻计测量到的实验波形,获得了冲击波在多孔钛材料中传播的衰减效应以及冲击波波速和波后粒子速度的D-u冲击绝热关系。依照实验情况在非线性动力学有限元软件中建立了数值模型,并根据计算结果得到了冲击波的压力-时间波形以及冲击绝热关系,拟合出了多孔钛材料的多项式形式Grüneisen状态方程。通过对压缩度μ进行泰勒展开,结合冲击波基本关系式及冲击绝热关系,从理论上得到了多项式形式Grüneisen状态方程系数的具体表达式。Shock properties of cellular titanium with regular pores were investigated by one-stage gas gun plate impact technique. With the experimental curves caught by the manganin gauge, the attenuation effect of shock wave propagating through the cellular titanium samples and the adiabatic impact D-u relationship between shock wave velocity and the practical velocity after shock wave are obtained. According to the experiments, a numerical model is built in nonlinear dynamic finite element software. The pressure-time curves of shock wave and the adiabatic relation are obtained from the numeri- cal results, and the polynomial Grtineisen equation of state of cellular titanium is given by numerical simulation. Moreover, with Taylor expansion of the squeezing degree μ , the coefficient of the polynomial Griineisen equation is deduced by using shock wave relations and the adiabatic relation.

关 键 词：多孔钛材料 动态力学性能 Grü neisen状态方程 

分 类 号：TB34[一般工业技术—材料科学与工程]