| α-锆低压动态力学特性研究 |
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| 引用本文： | 李英华,蔡灵仓,张林,李英雷.α-锆低压动态力学特性研究[J].高压物理学报,2007,21(2):188-192. |
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| 作者姓名： | 李英华 蔡灵仓 张林 李英雷 |
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| 作者单位： | 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实验室,四川绵阳,621900 |
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| 摘 要： | 在3.3×10-4～1.5×103 s-1应变率范围内获得了α-锆的应力-应变曲线，给出了Johnson-Cook本构拟合参数。利用含动态损伤与断裂的一维程序，较好复显了在峰值应力4.3～5.1 GPa范围测量的α-锆自由面速度剖面，验证了确定的α-锆低压动态力学参数的合理性。
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| 关 键 词： | α-锆 Johnson-Cook本构参数 自由面速度剖面 |
| 文章编号： | 1000-5773（2007）02-0188-05 |
| 收稿时间： | 2006-02-24 |
| 修稿时间： | 2006-02-242006-04-10 |
Dynamic Behavior of α-Zirconium at Low Pressure |
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| LI Ying-Hua,CAI Ling-Cang,ZHANG Lin,LI Ying-Lei.Dynamic Behavior of α-Zirconium at Low Pressure[J].Chinese Journal of High Pressure Physics,2007,21(2):188-192. |
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| Authors: | LI Ying-Hua CAI Ling-Cang ZHANG Lin LI Ying-Lei |
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| Institution: | Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, CAEP, Mianyang 621900, China |
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| Abstract: | The stress-strain curves of the α-zirconium which strain rate ranges from 3.3×10-4 s-1 to 1.5×103 s-1 under room temperature were obtained, and the parameters of Johnson-Cook model were determined through these experiments. The computed free-surface velocity profiles using dynamic damage and fracture model consist with the experimental measurements at 4.3 GPa and 5.1 GPa peak pressure. The comparison indicates that the determined dynamic parameters of α-zirconium are valid. |
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| Keywords: | α-zirconium α-zirconium Johnson-Cook constitutive parameter free surface velocity profiles |
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