H62铜合金本构模型构建及游动芯头拉拔力影响分析  

Construction of H62 Copper Alloy Constitutive Model and Analysis of the Influence of the Drawing Force on the Floating Plug

作　　者：曾艳祥[1] 姜志宏[1] 许永强[1] 李臣[1] 

机构地区：[1]江西理工大学机电工程学院,赣州341000

出　　处：《科学技术与工程》2016年第28期171-174,共4页Science Technology and Engineering

基　　金：国家自然科学基金项目(50665003);江西省自然科学基金项目(20132BAB206013)资助

摘　　要：以H62铜合金为实验材料,进行不同应变率下的单向拉伸试验。采用唯象建模方法建立铜合金的本构模型。通过二次开发,将本构模型导入MARC,以拉拔速度为实验参数,对游动芯头拉拔过程进行数值模拟。结果表明:利用强化系数与黏性系数建立的本构模型,对不同应变率下单向拉伸实验数据拟合效果较好,弹黏塑性模型对不同应变率下拉伸成形具有较好的适用性;随着拉拔速度增加,拉拔力逐渐增大,但增加的幅度较小。Taking H62 copper alloy as the experimental material, the uni-axial tensile experiences weretested under different strain rates, the constitutive model of copper alloy was established by phenomenotogical modeling method. Through secondary development, the model is imported into MARC. The drawing speed was set as the ex- perimental parameter, the numerical simulation of drawing process of the floating plug was carried out. The results show that constitutive model established by using the coefficient of reinforcement and viscosity coefficient fits the effect of uni-axial tensile test data under different strain rate better,The elastic-viscoplastic model has good applicability for stretch forming under different strain rates. With the increase of the drawing speed, the drawing force in- creased gradually, but the increase was smaller.

关 键 词：应变率 游动芯头拉拔 拉伸实验 弹黏塑性本构模型 数值模拟 

分 类 号：TG356[金属学及工艺—金属压力加工]