动力显式有限元法辊弯成形全流程仿真技术研究  

Whole process simulation of roll forming using dynamic explicit finite element method

作　　者：尹纪龙 李大永[1] 彭颖红[1] 王飞舟 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030 [2]日本中田制作所

出　　处：《塑性工程学报》2006年第1期36-39,共4页Journal of Plasticity Engineering

基　　金：国家自然科学基金(50375095);上海市自然基金资助项目(03ZR14064);上海市国际合作项目(041107049)资助

摘　　要：辊弯成形是大位移、大转动、有限应变的过程,具有复杂的非线性特征,成形规律难以通过传统“试错法”把握。为避免成形缺陷,降低开发成本,采用有限元法对辊弯成形进行全流程仿真,可以准确预测辊弯成形过程中应力-应变分布与变化规律,辅助工艺设计与产品开发。采用动力显式算法,可以缩减计算规模,避免隐式算法的迭代收敛问题等限制,容易实现大规模并行计算,减少计算时间。通过对槽型件的辊弯成形进行全流程仿真实例,验证了该方法的有效性。With large displacement, large rotation but finite strain, roll forming process shows distinct nonlinear characteristics. The forming law is difficult to catch using traditional ＂try and error＂ method. To avoid the forming defects and reduce the devel- opment cost, finite element method can exactly predict the distribution of stress and strain in roll forming process to aid the process design and product development. In contrast with implicit algorithm, dynamic explicit algorithm has more advantages in reducing the size of the problem, avoiding iterative convergence problem. And it can be computed in parallel easily. The simula tion of ＂U＂ channel part shows that the method is suitable for the whole process simulation of roll forming.

关 键 词：辊弯成形 全流程仿真 动力显式算法 有限单元法 

分 类 号：TG335[金属学及工艺—金属压力加工]