Based on non-linear finite element method (FEM) theory and frictional element technique, the extrusion of the bimaterial was analysed and the flow of the bimaterial during extrusion was clearly shown.

• 基于非线性有限元理论和方法，并引入摩擦单元技术，对双材料的挤压成形进行了数值分析，揭示了挤压过程中双材料的流动规律。