PET薄膜黏弹塑性模型构建和有限元模拟  

Constructing viscoelastic plasticity model of PET film and finite element simulation

作　　者：汪正应 欧长劲[1] 姜献峰[1] 朱强[1] 

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部/浙江省重点实验室,杭州310014

出　　处：《现代制造工程》2015年第11期80-83,87,共5页Modern Manufacturing Engineering

摘　　要：针对现有薄膜材料本构模型复杂性的问题,提出了一种新的建模方法:在三参数粘弹性模型的基础上,结合Mises屈服准则和各向同性流动理论构建出符合材料特性的粘弹塑性模型。根据单向拉伸实验数据拟合求解模型参数,并用Fortan语言编写材料子程序,用于PET薄膜的单向拉伸和拉深成型模拟。分析结果表明,该模型能比较准确的反映PET薄膜的力学性能,仿真结果与实验结果吻合度较高,可用于PET薄膜的成型研究。In view of the existing film material constitutive model for complex problems, proposed a new method of modeling. On the basis of the three parameters viscoelastic model and combining with the raises yield criterion and isotropic flow theory constructed viscoelastic plasticity model to meet the characteristics of material. Then according to the uniaxial tensile experi- ment data fitting to solve the model parameters, and wrote material subroutine with Fortan language for uniaxial tensile and deep drawing forming simulation of PET film. Analysis results showed that this model could accurately reflect the tensile property of PET film, the simulation results coincided with the experimental results very well, it can be used for the molding studies of PET film.

关 键 词：PET薄膜 粘弹塑性 塑性屈服 数值模拟 

分 类 号：TG356[金属学及工艺—金属压力加工]