解析Poly6-Ⅰ屈服准则对3104-H19铝合金拉深制耳预测的研究

Earing Prediction by Analytical Poly6-Ⅰ Yield Criterion on 3104-H19 after Deep Drawing

目的 研究解析Poly6-Ⅰ屈服准则预测具有高各向异性的3104-H19铝合金本构关系的能力,并将其应用于有限元仿真分析中,以实现对3104-H19铝合金拉深制耳的精确预测。方法 分析解析Poly6-I屈服准则的表达形式,减少计算参数所需的试验个数,并与经典的Yld2004-18p屈服准则进行对比,验证它对高各向异性力学性能预测的能力,将其嵌入到有限元软件中进行杯型件拉深制耳模拟,验证模型的精确性和有效性。结果 对于高各向异性材料,解析Poly6-Ⅰ屈服准则所使用的试验个数可以减少到11,它预测的3104-H19铝合金屈服轨迹的各向异性系数曲线和单向拉伸曲线与Yld2004-18p屈服准则预测的结果基本相同,杯型件拉深有限元模拟结果与试验结果基本一致。结论 与Yld2004-18p屈服准则相比,考虑高各向异性特性的解析Poly6-Ⅰ屈服准则所使用的试验数据更少,且无须使用优化软件求取参数,更为方便。解析Poly6-Ⅰ屈服准则能精确地预测3104-H19铝合金材料在杯型件拉深试验中的制耳个数及杯型件杯壁的成形高度。

The work aims to study the constitutive relationship of the high anisotropic material 3104-H19 aluminum alloy predicted by the analytical Poly6-Ⅰ yield criterion,and implement it into the finite element simulation analysis to accurately pre-dict the earing of 3104-H19 aluminum alloy after deep drawing.Through analyzing the expression of analytical Poly6-Ⅰ yield criterion,the number of tests required to calculate the parameters was reduced.Compared with the classical Yld2004-18p yield criterion,its ability to predict high anisotropy characteristics was verified,and it was implemented into the finite element soft-ware to simulate the earing for cup deep drawing,which was used to verify the accuracy and effectiveness of the model.For high anisotropic material,the number of tests used for Poly6-I yield criterion could be reduced to 11,and the predicted yield locus,Lankford coefficient curve and uniaxial tension curve of 3104-H19 aluminum alloy were almost the same as those predicted by the Yld2004-18p yield criterion,and the result of the finite element simulation of cup drawing was consistent with the experiments.Compared with the Yld2004-18p yield criterion,the analytical Poly6-Ⅰ yield criterion uses less ex-perimental data and does not use optimization software to obtain parameters,which is more user-friendly.The analytical Poly6-Ⅰ yield criterion can accurately predict the number of ears and the height of the cup wall for 3104-H19 aluminum alloy after cup deep drawing.