冲击加载-准等熵加载过程的密度梯度飞片计算设计

柏劲松; 罗国强; 唐蜜; 胡建波; 戴诚达; 马云; 谭华; 吴强

doi:10.11858/gywlxb.2009.03.003

冲击加载-准等熵加载过程的密度梯度飞片计算设计

doi: 10.11858/gywlxb.2009.03.003

柏劲松^1,,
罗国强^1,2,
唐蜜¹,
胡建波¹,
戴诚达¹,
马云¹,
谭华¹,
吴强¹

1.
中国工程物理研究院流体物理研究所，冲击波物理与爆轰物理国防科技重点实验室，四川绵阳 621900；
2.
武汉理工大学材料复合新技术国家重点实验室，湖北武汉 430070

详细信息

通讯作者:
柏劲松

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出版历程
- 收稿日期: 2008-04-10
- 修回日期: 2008-08-30
- 发布日期: 2009-06-15

Computational Design of Graded Density Impactors for Shock Loading

1.
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, China;
2.
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

More Information

Corresponding author: BAI Jing-Song

摘要

摘要: 采用一维弹塑性流体动力学计算方法，通过对LLNL（Lawrence Livermore National Laboratory）Mg-Cu体系密度梯度飞片冲击加载-准等熵加载实验过程数值计算和比较，验证了流体动力学计算方法、不同材料体系混合模型以及计算程序的正确性和实用性。考虑到在飞片材料制备中，单层厚度最小值为0.2 mm和Mg-W最大阻抗混合质量分数的致密条件限制，开展了对新的Mg-W体系密度梯度飞片实现冲击加载-准等熵加载过程计算设计，给出了满足加载要求的飞片结构特征；从计算给出的粒子速度波剖面可见，密度梯度飞片波阻抗分布对加载过程和加载强度非常敏感，通过精心设计准连续型变阻抗的梯度飞片，可以进行不同复杂加/卸载过程的物理模型设计和实验研究。
- 密度梯度飞片 /
- 复杂加载 /
- 气炮 /
- 数值计算 /
- Mg-W体系
Abstract: The method of 1D elastic plastic hydrodynamic calculations, the mixing model of different material constituents, and the shock dynamics code of compressible fluids were verified through the overall comparisons of the calculated results with the experimental data from Lawrence Livermore National Laboratory (LLNL). A Mg-W system prepared for graded density impactor (GDI) for quasi-isentropic compression was proposed by means of numerical simulations. By considering the actual material fabrication, the technical restrictions of minimum thickness of discrete layer, and the limitation of maximum mixing rate of the two individual constituents, a model GDI of a novel Mg-W system was designed to actualize the required loading traces and anchor the structural characteristics of GDI. Numerical calculations show that the loading path and intensity are highly sensitive to the distribution of wave impedance of GDI. The experimental designs and predictions for different complicated loading/unloading processes can be realized through model calculations.
- graded density impactor /
- complicated loading /
- light gas gun /
- computation /
- Mg-W system

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参考文献(10)

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