橡皮囊液压成形模拟算法的开发及应用  

The development and application of the numerical simulation algorithm for elastomer hydro-forming

作　　者：谢邵辉[1] 柳玉起[1] 杜亭[1] 章志兵[1] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,武汉430074

出　　处：《塑性工程学报》2011年第4期63-68,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(50905066);华中科技大学自主创新基金资助项目(Q2009010)

摘　　要：基于有限元增量理论和BWC壳单元,提出一种新的快速模拟橡皮囊液压成形的算法。该算法可简化橡皮囊层与板料接触模型,能够对橡皮囊层所施加作用的板料区域进行自动判断,并对该区域进行液压加载;根据橡皮囊的容积,可自动调整囊内的液压强度,将液压力均匀地分配在零件的节点上;同时,采用该算法对橡皮囊层与板料的摩擦模型进行处理。以一直弯边零件为研究对象,选择铝合金材料AA2024-O进行橡皮囊液压成形模拟,其模拟结果与相关文献中的数据进行比较证明,该文算法对橡皮囊液压零件成形具有良好的精度。The new rapid algorithm for the elastomer hydro-forming is based on BWC shell element and finite element increment theory.This algorithm simplified the model applied in the contact between the rubber vessel layer and the blank,and the blank area on which the rubber vessel layer acts can be adjusted automatically,at the same time,the liquid pressure will be loaded in this area.According to the volume of the rubber vessel,the loading path of liquid pressure can be calculated automatically,and the liquid force can be distributed evenly on the nodes of the part.The friction model between the rubber vessel layer and the blank was treated by this algorithm.The elastomer hydro-forming of a straight curved edge part was done with aluminum alloy AA2024-O.The comparison between the results calculated by this algorithm and the data provided by the literature show that this algorithm is precise in elastomer hydro-forming.

关 键 词：橡皮囊液压成形 BWC壳单元 数值模拟 液体压强 直弯边零件 

分 类 号：V261.2[航空宇航科学与技术—航空宇航制造工程]