摘要
针对TC1M钛合金板料,用ADINA软件对平底压窝成形及回弹过程进行了有限元数值模拟,对因各向异性而引起的制件形状变化给予描述,并进行了一系列室温下的压窝成形工艺试验,试验结果与有限元模拟预测结果吻合良好。研究结果表明,制件回弹后将产生两种形状畸变现象,一是凸缘底面翘曲,不再保持为平面,翘曲形式为两高两低,在TD方向上的凸缘外沿两点为翘曲最高点,在RD方向上的外沿两点为翘曲最低点;二是制件上顶面产生翘曲,翘曲高度亦遵循两高两低的变化规律,高低点位置与凸缘部分相似。
Raising processes of titanium alloy sheets TCIM were simulated using ADINA FEM software. The shape distortions induced by plastic anisotropy during forming and springback processes were described. A series of forming tests were conducted for the comparison of simulation prediction and test measurements. Reasonable agreement was obtained between the predicted and measured profiles of formed parts. Two sorts of shape distortion phenomena exhibit in the raised workpieces fabricated in room temperature after springback or elastic recovery process： Firstly, the bottom of the flange in the specimen distorts to be a wavy surface and not a plane. There two high points and two low points, and the high points locate in the flange periphery along the transverse direction （TD）, and the low points locate in the periphery along the rolling direction （RD） ; Secondly, the top surface of the raising specimen distorts to be a wavy surface too, and the distortion shape is similar to that in the flange.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2009年第2期62-65,共4页
Journal of Plasticity Engineering
基金
辽宁省高校重点实验室基金资助项目(20060643)
关键词
钛合金板材
压窝
回弹
形状畸变
titanium alloy sheet
raising
springback
shape distortion
