基于FEM与SPH耦合算法的单颗磨粒切削玻璃的动态过程仿真

中国机械工程 ›› 2013, Vol. 24 ›› Issue (20): 2716-2721.

基于FEM与SPH耦合算法的单颗磨粒切削玻璃的动态过程仿真

段念;王文珊;于怡青;黄辉;徐西鹏

华侨大学脆性材料加工技术教育部工程研究中心,厦门,361021

出版日期:2013-10-25 发布日期:2013-10-25
基金资助:
国家自然科学基金资助项目（51075159);福建省自然科学基金资助项目(2010J01296);福建省科技厅资助项目(2008H2004)
National Natural Science Foundation of China（No. 51075159）;

Fujian Provincial Natural Science Foundation of China（No. 2010J01296）;
Fujian Provincial Program of Ministry of Science and Technology of China（No. 2008H2004）

Dynamic Simulation of Single Grain Cutting of Glass by Coupling FEM and SPH

Duan Nian;Wang Wenshan;Yu Yiqing;Huang Hui;Xu Xipeng

Engineering Research Center for Brittle Material Machining,Ministry of Eduction,Huaqiao University,Xiamen,Fujian,361021

Online:2013-10-25 Published:2013-10-25
Supported by:

National Natural Science Foundation of China（No. 51075159）;

Fujian Provincial Natural Science Foundation of China（No. 2010J01296）;
Fujian Provincial Program of Ministry of Science and Technology of China（No. 2008H2004）

摘要/Abstract

摘要：

采用有限元法(FEM)与光滑质点流体动力学法（SPH）耦合算法,假设以圆锥作为磨粒的形状,以玻璃为工件材料，进行了单颗金刚石磨粒的三维磨削仿真。仿真结果表明：磨粒的挤压使工件材料向前方及两侧流动而产生隆起，且磨屑发生粉末化现象;沟槽的实际宽度远大于磨粒的切削宽度，断裂裂纹向沟槽两侧扩张，裂纹扩展一段后就停止不前而残留下来，成为残留裂纹。该方法可以较好地解决传统有限元法进行脆性材料磨削仿真时容易发生单元畸变的问题，验证了FEM与SPH耦合算法应用于脆性材料磨削仿真研究的可行性。

关键词: 单颗金刚石加工, 有限元法, 光滑质点流体动力学（SPH）, 脆性材料

Abstract:

Three-dimensional cutting of glass with a cone-shaped grain was simulated by coupling FEM and SPH to resolve the mesh distortion problem caused by using FEM only.The simulation results show that the workpiece material flows to side and front owing to the proceeding of single grain in the cutting direction,thereby leading to sideways flow and pulverization of cutting chips.It is also found that the width of actual groove left by the grain is greatly over the cutting width of the grain.The fracture cracks extend to the both sides of the groove and even enter into the workpiece surface to form residue cracks.The findings herein indicate the feasibility to simulate the cutting process for brittle materials
by coupling FEM and SPH.

Key words: single diamond grain processing, finite element method(FEM), smoothed particle hydrodynamics(SPH), brittle material

中图分类号:

TG501

段念;王文珊;于怡青;黄辉;徐西鹏. 基于FEM与SPH耦合算法的单颗磨粒切削玻璃的动态过程仿真[J]. 中国机械工程, 2013, 24(20): 2716-2721.

Duan Nian;Wang Wenshan;Yu Yiqing;Huang Hui;Xu Xipeng. Dynamic Simulation of Single Grain Cutting of Glass by Coupling FEM and SPH[J]. China Mechanical Engineering, 2013, 24(20): 2716-2721.

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