有限元铝合金镦粗变形过程应变场分布的研究模拟
关键词：铝合金；冷镦粗变形；应变场；数值模拟；网格法
Abstract
In this paper, DEFORM-3D finite element software aluminum upsetting deformation strain field distribution in the simulation study, analysis of different process conditions on the blank field distribution of internal strain, strain field given distribution law. The results show that: Aluminum strain at different locations with similar change process, the strain and deformation approximately linear relationship between the degree, and with the increase of deformation, the strain is increased, but at different positions to be variable increases the value of differences. For different positions, the position closer to the central portion of the larger degree of deformation is large, the greater the corresponding strain, the center point of the strain deformation of the aluminum pressure maximum point worth. Subsequently, using the grid method at different locations inside the blank strain were calculated for the numerical simulation results are verified, the two are basically the same, which proves this paper, the finite element method in the analysis of aluminum upsetting deformation strain the feasibility and reliability of the field distribution. Finally respectively Gaussian function, Cauchy - Lorentz function and the function of the analog Voigit the height direction and the width direction compressive strain distribution line fitting, simulation results show that the distribution of the data in accordance with Gaussian function, function of Cauchy-Lorenzcurve and Voigit function, numerical simulation results with high reliability.
Keywords：Aluminum alloy; Cold upsetting deformation; Strain field; Numerical Simulation; Grid method
目录
1绪论 1
1.1铝合金简介 1
1.1.1基本信息 1
1.1.2铝合金的金属特点 1
1.1.3铝合金的分类 2
1.2圆柱形坯料冷镦粗工艺 3
1.3 数值模拟技术在金属塑性变形过程中的优越性 4
1.4网格法测量应变中的应用 5
1.5 选题的目的和意义 6
1.6本课题的研究内容 6
2有限元数值模拟及DEFORM简介 8
2.1 引言 8
2.2有限元计算方法 8
2.3 DEFORM简介与特点 8
2.3.1 DEFORM软件简介 8
2.3.2 DEFORM的特点 9
2.4 DEFORM软件操作流程 10
2.5 DEFORM-3D 在冷镦方向应用 11
3铝合金镦粗变形过程应变场分布的研究 13
3.1 引言 13
3.2 建立有限元模型 13
3.3 数值模拟结果及分析 16