高精度三维塑性有限元网格重划技术的研究  

DEVELOPMENT OF HIGH PRECISION REMESHING TECHNIQUES OF 3D PLASTIC FEM

作　　者：王纪武[1] 胡忠[1] 王本一 刘庄[1] 

机构地区：[1]清华大学

出　　处：《塑性工程学报》1998年第1期15-19,共5页Journal of Plasticity Engineering

摘　　要：网格重划技术是制约三维大变形塑性有限元发展的关键之一。本文基于ＡＮＳＹＳ二次开发的三维有限变形弹塑性有限元软件，研究并建立了三维网格重划系统，该系统利用特征线和特征面提取法得到变形体的轮廓线和面进行网格重划，利用等参逆变换法直接将旧网格节点上的信息传递到新网格的高斯点上，可节约计算时间，提高计算精度，利用设定的标准场量分布与经传递的场量分布比较，分析了该系统信息传递的精度，并利用方料镦粗算例验证了该系统的可行性。Remeshing techniques are one of the key points of 3D plastic FEM used in numerical simulation of metal forming processesIn this paper,based on the developed ANSYS software of 3D elastoplastic FEM,the high precision remeshing system is built,in which it gets the deformed configuration by picking up the characteristic lines and faces from old mesh,and transfers the distribution information from the nodes of the old mesh directly to the Gauss points of the new one with the parametric inversion methodThe new system save the transferred time and keep a high transferred precisionThe precision of transferred distribution information has been examined in comparison with the standard oneThe system has been verified with the metal forming example of block upsetting

关 键 词：网络重划 三维塑性 有限元 金属成形 数值模拟 

分 类 号：TG111.7[金属学及工艺—物理冶金]