中文摘要：

联合方法的适应 EFG-FE 为侧面的挤出和提交向后挤出的数字模拟被建议并且发展。开始，模拟被使用一个常规 FE 模型实现了。在使变形的过程期间，网孔质量在每增长的步被检查。弄歪的元素自动地被变换成 EFG 节点，而，少些弄歪的元素被保留。产生 EFG 节点和接口元素的一个新算法被介绍。这个方法能够处理大变丑并且比完全使用一个 EFG 方法有更高计算的效率。数字结果证明联合方法的适应 EFG-FE 有合理精确性并且为本地体积金属形成例如挤出过程是有效的。

英文摘要：

An adaptive EFG-FE coupling method is proposed and developed for the numerical simulation of lateral extrusion and forward-backward extrusion. Initially, the simulation has been implemented by using a conventional FE model. During the deforming process, mesh quality is checked at every incremental step. Distorted elements are automatically converted to EFG nodes, whereas, the less distorted elements are reserved. A new algorithm to generate EFG nodes and interface elements is presented. This method is capable of dealing with large deformation and has higher computational efficiency than using an EFG method wholly. Numerical results demonstrate that the adaptive EFG-FE coupling method has reasonable accuracy and is effective for local bulk metal forming such as extrusion processes.