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材料工程  2015 

多孔钛材料的动态力学响应研究

DOI: 10.11868/j.issn.1001-4381.2015.09.014, PP. 87-93

Keywords: 多孔钛材料,动态力学性能,Grü,neisen状态方程

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Abstract:

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。

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