| 基于ALE方法的AZ31B镁合金微铣削有限元仿真 |
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| 引用本文： | 何启东,董志国,李文斌,刘建成.基于ALE方法的AZ31B镁合金微铣削有限元仿真[J].工具技术,2016(8):55-58. |
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| 作者姓名： | 何启东 董志国 李文斌 刘建成 |
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| 作者单位： | 1. 太原理工大学;2. 太原理工大学; 美国太平洋大学 |
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| 基金项目： | 国家自然科学基金(51575375) |
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| 摘 要： | 基于任意拉格朗日—欧拉(ALE)法,以AZ31B镁合金为研究对象,采用考虑应变梯度理论修正的Johnson-Cook本构模型作为描述力学性能的材料模型,使用ALE自适应网格技术有效克服仿真过程中网格畸变过大的问题,运用ABAQUS/Explicit对微铣削加工过程进行非线性弹塑性有限元模拟,分析切削过程中的应力应变以及温度分布,探究微细加工过程中的尺度效应和最小切削厚度,为实际加工参数的选择提供参考。
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| 关 键 词： | 镁合金 尺度效应 切削力 微铣削 ALE |
Micro Milling Finite Element Simulation of AZ31B Magnesium Alloy Based on ALE Method |
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| Abstract: | This research is based on Arbitrary Lagrangian-Eulerian (ALE)method,taking AZ31B magnesium alloy as the object of study,the material model for describing the material mechanics performance with consideration of strain gradi-ent theory modified Johnson-Cook constitutive model has been made.And the excessive mesh distortion occurred in the process of simulation has been solved by ALE adaptive grid technique.It has been made a finite element simulation for mi-cro-milling process nonlinear elastoplastic finite element simulation,analyzing the stress,strain and the temperature distribu-tion in the process of cutting,exploring the analysis of the scale effect in the process of micro machining and the minimum cutting thickness by ABAQUS/Explicit,this provides a reference for the selection of actual processing parameters. |
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| Keywords: | magnesium alloy scale effect cutting force micro milling ALE |
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