计算力学学报2011，Vol.28Issue(6)：938-942,5.
一种可考虑弯曲效应的多步法及其在矩形管拉弯成形中的应用
A new multi-step approach considering bending effects and its application in the stretch bending of rectangular tubes
摘要
Abstract
Multi-step approach can take the deformation history into account, adapts forming and has a good application prospect in the simulation of sheet metal forming. to multi-stage But traditional multi-step approaches are mostly based on the membrane element without considering bending effects exactly, not suited to the bending-dominated process, such as the stretch bending of profiles etc. Therefore the rotation-free BST element is introduced here to describe deformation, in which the curvatures are computed by a patch of four adjacent elements. Then using the principle of extremum work and the BST element, a new multi-step formulation is presented, in which penalty method is adopted to treat the contact between the workpiece and bending tools. Based on the formulation, a program has been developed and utilized to simulate step and the process for stretch bending of rect s, including pre-stretch and bending, with special attentions paid on angu the lar tubes within six large cross sectional distortions springback problems. The numerical results basically agree with those of incremental analysis and experiments.关键词
多步法/弯曲效应/BST壳单元/罚函数法/矩形管拉弯Key words
multi-step approach/bending effects/BST element/the penalty method/stretch bending of rectangular tube分类
矿业与冶金引用本文复制引用
傅立军,董湘怀,王鹏..一种可考虑弯曲效应的多步法及其在矩形管拉弯成形中的应用[J].计算力学学报,2011,28(6):938-942,5.基金项目
国家自然科学基金（50575143）资助项目 （）
