计算物理 ›› 2011, Vol. 28 ›› Issue (3): 368-374.

• 研究论文 • 上一篇    下一篇

一种适用于各向异性材料的修正PUFF物态方程

黄霞1, 汤文辉1, 蒋邦海1, 王道荣2   

  1. 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
  • 收稿日期:2010-03-17 修回日期:2010-09-08 出版日期:2011-05-25 发布日期:2011-05-25
  • 作者简介:黄霞(1984一),女,四川,博士生,从事高能粒子柬引起的材料和结构响应等方面的研究工作,E-mail:hx_1984.4@163.com
  • 基金资助:
    国家自然科学基金(11072262)资助项目

A Modified PUFF Equation of State for Anisotropic Materials

HUANG Xia1, TANG Wenhui1, JIANG Banghai1, WANG Daorong2   

  1. 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
  • Received:2010-03-17 Revised:2010-09-08 Online:2011-05-25 Published:2011-05-25

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.

关键词: 修正PUFF物态方程, 各向异性, 非线性, X射线辐照

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 gradually.

Key words: modified PUFF equation of state, anisotropic, nonlinearity, X-ray radiation

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