混合物冲击压缩后平衡态的研究

林华令; 黄风雷; 胡玉新; 于万瑞; 方剑青

doi:10.11858/gywlxb.2004.01.011

混合物冲击压缩后平衡态的研究

doi: 10.11858/gywlxb.2004.01.011

1.
北京理工大学机电工程学院，北京 100081；
2.
国防科技大学理学院应用物理系，湖南长沙 410073

详细信息

通讯作者:
林华令

计量
- 文章访问数: 8105
- HTML全文浏览量: 341
- PDF下载量: 740
出版历程
- 收稿日期: 2003-04-19
- 修回日期: 2003-06-25
- 发布日期: 2004-03-05

Studies on the Equilibrium State of Mixture Following Shock Compression

1.
College of Electron-Mechanics Engineering, Beijing Institute of Technology, Beijing 100081, China;
2.
Department of Applied Physics, College of Science, National University of Defense Technology, Changsha 410073, China

More Information

Corresponding author: LIN Hua-Ling

摘要

摘要: 将混合物组元颗粒在三维网格内按组元比例随机分布，采用热动力学有限元数值方法，对其冲击压缩过程进行数值模拟。研究了混合物在冲击压缩下趋于热动力平衡过程、热平衡特征时间、压力平衡特征时间和平衡后的热力学状态，得出热平衡特征时间与颗粒度的平方近似成正比，而力平衡特征时间与颗粒度近似成正比。数值模拟了多种合金的冲击压缩特性，其结果与混合物物态方程的体积相加模型、一次冲击绝热线的叠加原理和实验等不同方法获得的结果作了比较，除冲击温度外，各方法得到的结果一致；体积相加模型和叠加原理不能给出合理的混合物冲击温度，但数值模拟能给出合理的混合物冲击温度。
- 混合物 /
- 数值模拟 /
- 热力学平衡 /
- 特征时间 /
- 冲击温度
Abstract: The mixture is as a randomly distributed component grains in three-dimensional meshes. The shock compression behavior of mixtures is simulated numerically by using the 3D thermodynamics finite element method. We have studied the course of tendency to the thermodynamic equilibrium, the characteristic time of temperature equilibrium, the characteristic time of pressure equilibrium and the equilibrium state of mixture following the shock compression and found the relation between the characteristic time of temperature equilibrium and the square of the grain dimension of mixture and the linear relation between the characteristic time of pressure equilibrium and the grain dimension. The shock compression behaviors of some alloys are simulated numerically, and the results are compared with the fraction volume model of EOS, the superposition principle of the first shock Hugoniot, and the experimental results. Except for the shock temperature, the results are in good agreement with each other. The fraction volume model and the superposition principle cannot yield reasonable shock temperatures, but the numerical simulation method does.
- mixture /
- numerical simulation /
- thermodynamic equilibrium /
- characteristic time /
- shock temperature

HTML全文

参考文献(16)

Xu X S, Zhang W X. Introduction to Theory of Practicable Equation of State [M]. Beijing: Science Press, 1986: 231-239. (in Chinese)

徐锡申, 张万箱. 实用物态方程理论导引 [M]. 北京: 科学出版社, 1986: 231-239.

Jing F G. Introduction to Experimental Equation of State(2nd ed) [M]. Beijing: Science Press, 1999: 82-99, 183-185, 197-199. (in Chinese)

经福谦. 实验物态方程导引(第二版) [M]. 北京: 科学出版社, 1999: 82-99, 183-185, 197-199.

Meyers M A. Dynamic Behavior of Materials [M]. New York: John Wiley Sons Inc, 1994: 135-140.

特鲁宁 Р Ф. 高压高温下凝聚物质的性质 [M]. 韩钧万译. 绵阳: 中国工程物理研究院流体物理研究所, 1996: 290-303.

Shao B H, Liu Z Y. Equation of State for Amorphous Metallic Alloy Powders under Explosive Consolidation [A]. Proceedings of the 2nd International Symposium on Intense Dynamic Loading and Its Effects [C]. Chengdu: Sichuan University Press, 1992: 244-247.

Lin H L. Simulation of Shock Compression Behavior of Mixture by Using the Finite Element Method [J]. Chinese Journal of High Pressure Physics, 1998, 12(1): 40-46. (in Chinese)

林华令. 有限元法模拟混合物的冲击压缩特性 [J]. 高压物理学报, 1998, 12(1): 40-46.

Lin H L, Huang F L, Yu W R. Numerical Simulation of Shock Temperature of Mixtures during Shock Loading [J]. Chinese Journal of High Pressure Physics, 2002, 16(1): 46-56. (in Chinese)

林华令, 黄风雷, 于万瑞. 混合物冲击温度的数值模拟 [J]. 高压物理学报, 2002, 16(1): 46-56.

Hallquist J O. Preliminary User's Manuals for DYNA3D and DYNAP [R]. UCID-17268, 1979: 1-8.

Hallquist J O. Theoretical Manual for DYNA3D [R]. UCID-19401, 1983: 5-44, 58, 63.

Lin H L, Huang F L. Numerical Simulation of Thermodynamics Problem [J]. Chinese Journal of High Pressure Physics, 2003, 17(1): 35-44. (in Chinese)

林华令, 黄风雷. 热动力学问题的数值模拟 [J]. 高压物理学报, 2003, 17(1): 35-44.

Wilkins W L. Modeling the Behavior of Materials [M]. Livermore, California: University of California, Lawrence Livermore National Laboratory, 1986.

施引文献

资源附件(0)

访问统计