| 离散元与有限元结合的多尺度方法及其应用 |
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| 引用本文： | 胥建龙,唐志平.离散元与有限元结合的多尺度方法及其应用[J].计算物理,2003,20(6):477-482. |
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| 作者姓名： | 胥建龙 唐志平 |
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| 作者单位： | 中国科学技术大学力学和机械工程系, 中科院材料力学行为和设计重点实验室, 安徽 合肥 230026 |
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| 基金项目： | 高技术激光领域和中科院基金(c42201.02)资助项目 |
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| 摘 要： | 在深入研究复杂结构和非均质材料冲击响应和破坏机理的过程中,往往遇到多尺度计算问题.提出并建立起离散元与有限元结合的多尺度方法,该方法采用离散元对感兴趣的局部进行细观尺度的模拟,利用有限元进行宏观的模拟,从而节约了计算时间.采用一种特殊的过渡层衔接离散元区和有限元区.将这一方法应用于激光辐照下预应力铝板的破坏响应,并将得到的模拟结果与实验进行了比较.
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| 关 键 词： | 离散元 有限元 多尺度计算方法 激光辐照 |
| 文章编号： | 1001-246X(2003)06-0477-06 |
| 收稿时间： | 2002-09-25 |
| 修稿时间： | 2002年9月25日 |
Combined Discrete/Finite Element Multiscale Numerical Method and Its Application |
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| XU Jian-long,TANG Zhi-ping.Combined Discrete/Finite Element Multiscale Numerical Method and Its Application[J].Chinese Journal of Computational Physics,2003,20(6):477-482. |
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| Authors: | XU Jian-long TANG Zhi-ping |
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| Institution: | Key Laboratory for Mechanical Behavior and Design of Materials, CAS, Department of Modern Mechanics, University of Science and Technology of China, Heifei 230026, China |
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| Abstract: | Analysis of a variety of engineering problems requires computations at different length scales. A combined discrete/finite element numerical method is proposed and generated to meet this requirement. This method performs discrete element method at meso-scale to reach necessary precision, and finite element method at macro-scale to save the computation time and cost. The key point for this method is to define a special transition layer between the discrete element zone and the finite element zone. This new method is applied to simulate the failure response of a pre-stressed aluminum plate under laser irradiation and find agreement between the computationan result and the experimental result. |
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| Keywords: | discrete element method finite element method multiscale simulation method laser irradiation |
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