首页> 外文OA文献 >Progress in mixed Eulerian-Lagrangian finite element simulation of forming processes
【2h】

Progress in mixed Eulerian-Lagrangian finite element simulation of forming processes

机译:混合欧拉 - 拉格朗日成形过程有限元模拟研究进展

摘要

A review is given of a mixed Eulerian-Lagrangian finite element method for simulation of forming processes. This method permits incremental adaptation of nodal point locations independently from the actual material displacements. Hence numerical difficulties due to large element distortions, as may occur when the updated Lagrange method is applied, can be avoided. Movement of (free) surfaces can be taken into account by adapting nodal surface points in a way that they remain on the surface. Hardening and other deformation path dependent properties are determined by incremental treatment of convective terms. A local and a weighed global smoothing procedure is introduced in order to avoid numerical instabilities and numerical diffusion. Prediction of contact phenomena such as gap openning and/or closing and sliding with friction is accomplished by a special contact element. The method is demonstrated by simulations of an upsetting process and a wire drawing process.
机译:审查了混合的欧拉-拉格朗日有限元方法,用于模拟成形过程。这种方法可以独立于实际的材料位移来增量调整节点位置。因此,可以避免由于较大的元素变形而导致的数值困难,如应用更新的拉格朗日方法时可能出现的那样。可以通过调整节点表面点的方式来考虑(自由)表面的运动,使其保持在表面上。硬化和其他取决于变形路径的​​特性是通过对流项的增量处理来确定的。为了避免数值不稳定性和数值扩散,引入了局部加权的全局平滑程序。接触现象的预测,例如间隙的打开和/或闭合和摩擦滑动,是通过特殊的接触元件完成的。通过an粗工艺和拉丝工艺的仿真证明了该方法。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号