摘要
建立了TA32钛合金本构模型,在模具上添加了不同的拉延筋,并对其进行了优化以消除皱纹。使用Barlat 89和Hill 48屈服准则来比较有限元模拟的预测精度。通过热冲压成形实验,测量了TA32钛合金马鞍形零件的厚度分布,并与模拟结果进行比较。结果表明:添加X轴和Y轴拉延筋可以有效消除皱纹,实现马鞍形零件精确成形,并且无任何缺陷。采用Barlat 89屈服准则的有限元模型比采用Hill 48屈服准则的模型具有更好的预测精度,该有限元模拟具有较好的理论预测意义。研究了成形后零件的力学性能和显微组织,各项性能均达到了实际工程需要。
The constitutive model of TA32 titanium alloy was established,and different drawbeads were added on the die to eliminate the wrinkles.The Barlat 89 and Hill 48 yield criterions were used to compare the prediction accuracy of the finite element simulations.The saddle shape part of TA32 titanium alloy was hot-stamped,and the thickness distribution was measured and compared with the simulation results.Results show that the wrinkles can be effectively eliminated by adding the drawbeads along Xaxis and Y-axis.The saddle shape part can be precisely formed without defects.The finite element model with Barlat 89 yield criterion has better prediction accuracy than that with Hill 48 yield criterion does,indicating that the finite element simulation has good theoretical prediction significance.The mechanical properties and microstructure of the hot-stamped part were investigated and it is found that they all meet the practical engineering requirements.
作者
宋飞
王宁
苏楠
陈明和
谢兰生
Song Fei;Wang Ning;Su Nan;Chen Minghe;Xie Lansheng(National Key Laboratory of Science and Technology on Helicopter Transmission,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2022年第9期3252-3262,共11页
Rare Metal Materials and Engineering
基金
Aviation Key Fund Project of China (20153021001)。
关键词
TA32钛合金
热冲压
马鞍形零件
有限元模拟
拉延筋
屈服准则
TA32 titanium alloy
hot stamping
saddle shape part
finite element simulation
drawbeads
yield criterion
