板材多点成形时摩擦边界条件的处理方法  

TREATMENT OF FRICTION BOUNDARY CONDITION DURINGMULTI POINT FORMING PROCESS OF METAL PLATE

作　　者：李广权[1,2,3] 李明哲[1,2,3] 苏世忠[1,2,3] 李淑慧[1,2,3] 刘纯国[1,2,3] 魏贞伟 

机构地区：[1]吉林工业大学辊锻工艺研究所 [2]吉林工业大学研究生部 [3]吉林省粮食高等专科学校食品化工系

出　　处：《农业机械学报》1999年第2期99-103,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家重点科技攻关项目;高校博士点基金

摘　　要：提出了具有强烈弯曲效应的大应变、大位移与边界条件三重非线性空间曲壳的有限元列式和多点成形时库仑摩擦边界条件的处理方法。A finite element procedure for shell is given, which can solve nonlinear problems with large strain, large displacement and complex boundary conditions. It is the first time that authors introduce the Coulomb friction law into multi point forming process and develop a method of dealing Coulomb friction boundary condition. According to the classic J 2 flow theory, two multi point forming processes i.e. multi point mode forming and multi point press forming are simulated. The results from multi point mode forming and multi point press forming are different obviously because of their different contact conditions. Meanwhile, the computed result is the same as that from the experiment. This means that the curved shell elements used in this finite element procedure conduced to a high accuracy solution.

关 键 词：板材 成形 马鞍面 多点模具成形 摩擦边界 

分 类 号：TG301[金属学及工艺—金属压力加工] O242.21[理学—计算数学]