实体壳单元及其在动力显式有限元方法中的应用  

The Solid Shell Element and Its Application in the Dynamic Explicit Finite Element Method

作　　者：李大永[1] 罗应兵[1] 彭颖红[1] 刘守荣[2] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030 [2]中国农业大学机械工程学院,北京100083

出　　处：《上海交通大学学报》2006年第10期1663-1666,共4页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(50375095);上海市自然科学基金项目(03ZR14064);上海市国际合作资助项目(041107049);上海市重点基础研究资助项目(04JC14050)

摘　　要：将实体壳单元模型引入动力显式有限元方法,并采用假定自然应变方法消除剪切闭锁和梯形闭锁,利用平面应力假定改善厚向闭锁,通过共旋理论更新应力.对标准算例的计算及其与实体单元计算结果的对比显示,在相同计算模型条件下,实体壳单元模型较实体单元有更好的精度.利用实体壳单元对一段辊弯成型过程进行模拟.结果显示,采用实体壳单元可以有效缩小计算规模,提高计算效率.The solid shell element model was introduced into the dynamic explicit finite element method.The assumed natural strain(ANS) method was adopted to resolve shear locking and trapezoidal locking problem.Stress was updated based on a co-rotational formulation.Two benchmark examples were calculated and the calculating results were compared with those by solid element model.The results show that the proposed solid shell element model presents higher precision than the solid element.A stage of roll forming process was also simulated and the result shows that using solid shell element can improve calculation efficiency with no loss in accuracy.

关 键 词：实体壳 动力显式有限元 假定自然应变 共旋理论 

分 类 号：TG335.75[金属学及工艺—金属压力加工] O344.3[理学—固体力学]