基于有限元模拟室温下等通道转角挤压纯钛工件的设计

稀有金属材料与工程, 2015, 44(5): 1082-1087.

基于有限元模拟室温下等通道转角挤压纯钛工件的设计

王晓梅 ^1, , 陈银佳 ^2, , 韩其琛 ^3, , 陈爱英 ^4, , 李翔 ^5, , 刘芳 ^6, , 潘登 ^7,

1.上海理工大学,上海200090;上海电机学院,上海200240

2.上海理工大学,上海,200090

3.上海理工大学,上海,200090

4.上海理工大学,上海,200090

5.上海理工大学,上海,200090

6.上海理工大学,上海,200090

7.上海理工大学,上海,200090

基金项目: Shanghai Municipal Education Commission(5313310202,13ZR1427900) National Natural Science Foundation of China(11202134,51102264 and 51271123)

关键词：有限元法 , 钛 , 等通道转角挤压 , 变形

Design of RT Equal Channel Angular Pressing Pure Titanium Workpiece by Finite Element Simulation

Keywords： finite element method , titanium , equal channel angular pressing , deformation

为了优化室温下等通道转角挤压纯钛工件的几何形状,采用三维有限元软件模拟了纯钛工件的变形行为.通过对比分析工件形状和尺寸对损伤因子、挤压力以及剪切带处应变速率分布等参数的影响,获得了工件最佳几何形状.仿真结果表明,方条形工件的损伤因子大于圆棒型工件,且高于纯钛材料的临界损伤因子,表明方条形工件不利于变形,易产生表面裂纹.3D模拟结果表明,直径为15mm的圆棒型工件具有最小的损伤因子,适中的挤压载荷以及相对均匀的应变分布.依据仿真结果提供的最佳工件,即直径为15mm的圆棒型工件,室温下成功挤压出直径15mm的纯钛圆棒.挤压后样品截面上硬度分布均匀,与3D仿真所预示的均匀应变分布相一致.

参考文献

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