| 王宇新,李晓杰,孙国.无网格MPM法三维爆炸焊接数值模拟[J].计算力学学报,2013,30(1):34~38 |
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| 无网格MPM法三维爆炸焊接数值模拟 |
| Three dimensional simulation of the explosive welding by using of the MPM |
| 投稿时间：2011-10-24 修订日期：2011-12-27 |
| DOI：10.7511/jslx201301006 |
| 中文关键词: 无网格法 物质点法 爆炸焊接 数值模拟 |
| 英文关键词:meshless method material point method explosive welding numerical simulation |
| 基金项目:中央高校基本科研业务费专项资金(DUT11LK04)资助项目. |
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| 中文摘要: |
| 物质点法MPM(Material Point Method)是无网格方法之一。它是在质点网格法(PIC)基础上发展而来的一种新数值方法,它利用了欧拉法和拉格朗日法两者的优点,计算物质点在冲击载荷下的应力和应变;通过物质点来跟踪材料体的变形和破损,而在整个计算过程中背景网格始终固定不变,避免了重新划分网格。本文应用MPM法计算三维爆炸焊接问题,在爆轰载荷作用下的飞板和基板的金属动态变形过程进行了三维数值模拟,并且对飞板的碰撞点速度和爆轰压力变化进行了计算分析。 |
| 英文摘要: |
| As one of meshless methods.The material point method is a new numerical simulation method which evolved from the Particle-in-Cell method.The MPM takes advantage of both Eurlerian and Lagrangian methods.Strain and stress values of the material points under impact load are calculated by governing equations and constitutive relation.The deformation and fracture of continuum body are described by the material points coordinate,and background mesh is fixed.The MPM is used to simulate explosive welding problem in this paper.Three dimensional deformation of the flyer plate and base plate are simulation under detonation load,and impact velocity and explosion pressure of the flyer plate are calculated. |
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