基于粘弹塑性模型的时效成形仿真  

Simulation for age forming based on viscoelastic plasticity model

作　　者：熊威[1] 甘忠[1] 许旭东[2] 袁胜[2] 

机构地区：[1]西北工业大学现代设计与集成制造技术教育部重点实验室,西安710072 [2]成都飞机工业(集团)有限责任公司制造工程部,成都610000

出　　处：《塑性工程学报》2012年第2期33-37,共5页Journal of Plasticity Engineering

摘　　要：为描述时效成形过程中的弹性、塑性和粘性变形,采用粘弹塑性本构模型进行时效成形有限元仿真。通过推导增量形式的本构方程,将粘弹塑性模型应用于有限元软件ABAQUS。通过反分析的方法确定铝合金2124T851的粘性系数,并且将仿真结果与试验结果进行对比,检验了本构方程和材料参数的有效性。运用有限元仿真,研究了预热对时效成形回弹的影响和在特定工艺条件下时效成形中粘性变形和塑性变形所占的比例。To describe the elastic,plastic and viscous deformation in age forming,a viscoelastic plasticity model had been used in finite element simulating for age forming.The viscoelastic plasticity model was applied in FE solver ABAQUS by deriving an incremental form.The viscous parameter of aluminum alloy 2124T851 had been identified and the simulation results had been compared with experimental results to certify the material parameter and constitutive equations.The FE model had been used to study the effects of preheating on springback in age forming and the amounts of viscous deformation and plastic deformation under certain age forming process.

关 键 词：粘弹塑性 时效成形 工艺设计 有限元分析 

分 类 号：V261.3[航空宇航科学与技术—航空宇航制造工程] TG386.1[金属学及工艺—金属压力加工]