Influence of viscous medium temperature distribution on sheet fracture in viscous pressure forming at warm temperature

摘要：

Viscous pressure forming (VPF) of aluminum alloy AA3003 sheet metal at warm temperature was investigated by using coupled thermo-elastoplastic-viscoplastic finite element method.The influence of viscous medium temperature distribution on sheet fracture location was studied and the distributions of fracture factor at different temperatures were obtained by using ductile fracture criterion.The results show that the failure of sheet metal varies with increasing initial temperature of viscous medium.When the initial temperature of viscous medium is near that of sheet metal,the failure location occurs at dome center,and when the initial temperature of viscous medium is too low,however,the failure location occurs at die corner.The occurrence of fracture can be postponed and even prevented through controlling the temperature distribution in viscous medium.

关键词： temperature distribution aluminum alloy warm viscous pressure forming fracture Tinite element method numerical simulation

作者: LIU Jian-guang WANG Zhong-jin ZHANG Xin LI Yi

作者单位: School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China Shenyang Aircraft Industry Group Co Ltd,Shenyang 110034,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）