摘要
为了探究铝合金的成形性能,需要建立正确的材料模型以反映材料的变形行为和断裂现象,设计了单轴拉伸、平面应变和压缩3种各向异性试样以及两端缺口、中心圆孔和剪切3种断裂试样,结合数字图像相关法进行试验。基于试验和建模,标定了Yld2000-3d各向异性屈服准则、Swift-Voce硬化模型以及DF2014断裂模型。结果表明:5052铝合金具有明显的各向异性,采用Yld2000-3d各向异性屈服准则能准确表征铝合金的各向异性行为,Swift-Voce模型能准确预测缩颈之后的整段硬化曲线,利用DF2014断裂模型对5052铝合金的断裂行为进行预测,并结合有限元仿真得到断裂模型的参数,显示断裂模型能准确预测铝合金的断裂行为。
In order to investigate the formability of aluminum alloy,it is necessary to establish a correct material model,which can reflect the deformation behavior and fracture phenomenon of the material.In order to study the appropriate constitutive model and fracture model,three aniso-tropic specimens of uniaxial tension specimen,planar strain specimen,and compression speci-men,as well as three fracture specimens of notched specimen,specimen with a central hole and shear specimen were used.Experiments were carried out in combination with digital image corre-lation method.Based on experiments and modeling,Yld2000-3d anisotropic yield criterion,Swift-Voce hardening model and DF2014 fracture model were calibrated.The results showed that 5052 aluminum alloy had obvious anisotropy behavior,and the anisotropic behavior of aluminum alloy could be accurately reflected by Yld2000-3d anisotropic yield criterion,and the Swift-Voce model could accurately predict the whole hardening curve after necking.DF2014 fracture model was used to predict the fracture behavior of 5052 aluminum alloy,and the parameters of the fracture model were obtained by finite element simulation.The results showed that this fracture model could accurately predict the fracture behavior of aluminum alloy.
作者
张晓蕾
陈思达
王子健
ZHANG Xiaoei;CHEN Sida;WANG Zijian(School of Iron and Steel,Soochow University,Suzhou 215137,China;MiTAC Precision Technology(Kunshan)Co.,Ltd.,Suzhou 215300,China)
出处
《模具工业》
2024年第8期27-35,共9页
Die & Mould Industry
关键词
5052铝合金
各向异性
本构模型
数值模拟
5052 aluminum alloy
anisotropy
constitutive model
numerical simulation
