| 一种离散单元法的弹性可变形颗粒模型 |
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| 引用本文： | 温彤,雷杰,裴春雷.一种离散单元法的弹性可变形颗粒模型[J].重庆大学学报(自然科学版),2009,32(7):743-746. |
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| 作者姓名： | 温彤 雷杰 裴春雷 |
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| 作者单位： | 重庆大学材料科学与工程学院; |
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| 基金项目： | 重庆市自然科学基金资助项目(CSTC,2006BB4020) |
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| 摘 要： | 基于弹性变形的Hooke定律,提出了一种考虑颗粒变形以及不同材料特性的离散单元法(discrete element method,DEM)的多边形颗粒模型,根据该模型开发了相应的DEM程序。应用有限元方法和DEM模拟了弹性颗粒的碰撞过程。通过与有限元计算结果比较,证明在处理颗粒的接触问题时,该弹性可变形颗粒模型比传统刚性模型能够准确地反映颗粒介质的实际变形和接触力的变化,从而能够提高DEM分析的精度。
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| 关 键 词： | 离散单元法 颗粒 变形 碰撞 |
| 收稿时间： | 2009/3/15 0:00:00 |
Elastic deformable particle model in discrete element method |
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| WEN Tong,LEI Jie and PEI Chun lei.Elastic deformable particle model in discrete element method[J].Journal of Chongqing University(Natural Science Edition),2009,32(7):743-746. |
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| Authors: | WEN Tong LEI Jie and PEI Chun lei |
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| Institution: | College of Material Science and Engineering;Chongqing University;Chongqing 400030;P.R.China |
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| Abstract: | A polygon particle model with discrete element method(DEM) is developed based on the Hooke's law,in which the geometry change caused by the elastic deformation and features of material can be taken into account.A DEM programme is developed based on the proposed model and collision processes of elastic particles is studied with finite element method(FEM) and DEM.Comparing the result of DEM with that of FEM.When dealing with the problem of particles contact,the real deformation and the contact force variation... |
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| Keywords: | discrete element method particle deformation collision |
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