| 一种适用于各向异性材料的修正PUFF物态方程 |
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| 引用本文： | 黄霞,汤文辉,蒋邦海,王道荣.一种适用于各向异性材料的修正PUFF物态方程[J].计算物理,2011,28(3):368-374. |
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| 作者姓名： | 黄霞 汤文辉 蒋邦海 王道荣 |
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| 作者单位： | 1. 国防科技大学理学院, 湖南 长沙 410073;2. 试验物理和计算数学国家级重点实验室, 北京 100076 |
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| 基金项目： | 国家自然科学基金(11072262)资助项目 |
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| 摘 要： | 给出一种适用于各向异性材料的修正PUFF物态方程,既能体现各向异性材料在压缩和膨胀过程中材料体积变化的非线性特征,又能反映材料的各向异性强度效应.以正交各向异性材料二维碰撞问题和X射线辐照下的二维热击波为例,利用有限元方法编写程序进行数值模拟,对根据传统PUFF物态方程和修正PUFF物态方程计算得到的平均正应力值作对比研究,结果表明,低压和拉伸状态下二者存在明显差异,在高压下二者趋于一致.
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| 关 键 词： | 修正PUFF物态方程 各向异性 非线性 X射线辐照 |
| 收稿时间： | 2010-03-17 |
| 修稿时间： | 2010-09-08 |
A Modified PUFF Equation of State for Anisotropic Materials |
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| HUANG Xia,TANG Wenhui,JIANG Banghai,WANG Daorong.A Modified PUFF Equation of State for Anisotropic Materials[J].Chinese Journal of Computational Physics,2011,28(3):368-374. |
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| Authors: | HUANG Xia TANG Wenhui JIANG Banghai WANG Daorong |
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| Institution: | 1. College of Science, National University of Defense Technology, Changsha 410073, China;2. National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematical, Beijing 100076, China |
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| Abstract: | A modified PUFF equation of state is proposed with considenation of both non-linear volume change and anisotropic strength of material under compression and dilation.Taking 2-D impact of orthotropic material and thermal shock wave under X-ray radiation as examples,a finite element program is developed.The mean stresses obtained by traditional and modified PUFF equation of state are compared.They are obviously different at low compression and tension states.With increase of stress,they tends to be consistent... |
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| Keywords: | modified PUFF equation of state anisotropic nonlinearity X-ray radiation |
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