| 强激光辐照下纳米铜动态拉伸型断裂的数值模拟 |
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| 引用本文： | 王永刚, 贺红亮. 强激光辐照下纳米铜动态拉伸型断裂的数值模拟[J]. 强激光与粒子束, 2009, 21(11). |
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| 作者姓名： | 王永刚 贺红亮 |
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| 作者单位： | 1.宁波大学 力学与材料科学研究中心, 浙江 宁波 31 521 1 ;;;2.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 621 900 |
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| 基金项目： | 国家自然科学基金项目，浙江省教育厅项目，宁波大学王宽诚教育基金 |
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| 摘 要： | 基于强激光辐照加载下纳米铜的层裂实验，采用含逾渗软化函数的损伤度函数模型对实验结果进行了数值模拟研究。强激光加载条件被简化为高斯分布脉冲压力施加在镍合金基体的前表面上。数值计算结果显示：损伤演化明显地改变了试样中波传播特性，无论是对微损伤还是完全层裂的试样，计算都较好地再现了实测自由面速度剖面，表明了含逾渗软化函数的损伤度函数模型在强激光加载条件下纳米铜层裂问题分析中具有较好适用性。
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| 关 键 词： | 纳米铜 含逾渗软化函数 层裂 数值模拟 |
| 收稿时间： | 1900-01-01; |
Numerical simulation of laser-driven dynamic tensile fracturein nanocrystalline copper |
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| wang yonggang, he hongliang. Numerical simulation of laser-driven dynamic tensile fracture in nanocrystalline copper[J]. High Power Laser and Particle Beams, 2009, 21. |
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| Authors: | Wang Yonggang He Hongliang |
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| Affiliation: | 1. Mechanics and Materials Science Research Center,Ningbo University,Ningbo 315211,China;;;2. Laboratory for Shock Wave and Detonation Physics Research,Institute of Fluid Physics,CAEP,P.O.Box 919-108,Mianyang 621900,China |
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| Abstract: | Using a modified damage function model with the percolation-relaxation function, the spallation in nanocrystalline copper by laser irradiation loading was investigated numerically. Laser-driven loadings were simulated by a Gaussian temporal pressure profile, applied at the front surface of the Ni alloy substrate. Simulation results indicated that the damage evolution had serious influence on the wave propagation in nanocrystalline copper sample. Good agreement was obtained between experimental and predicted free surface velocity profiles, which confirmed the capability of the damage model for describing the spallation process in nanocrystalline copper. |
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| Keywords: | nanocrystalline copper percolation-relaxation function spallation numerical simulation |
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