【摘要】 通过将有限元法与有限体积法相结合,在MSC.SuperForge商业软件上实现了挤压比λ=62.6的空心薄壁铝型材挤压过程的数值仿真,获得了该型材挤压过程的材料流动速度场、应力场、应变场、温度场分布图以及焊合过程.通过与生产试模结果的比较表明,基于数值分析的虚拟试模对挤压模具设计和挤压工艺的优化有直接指导意义.更多还原

【Abstract】 A new simulation system was developed by integrating finite element method(FEM) and finite volume method(FVM) based on the theories of large deformation elastic-plastic FEM and FVM,and the forming process of a complex hollow thin-walled aluminum profile 1633B of extrusion ratio λ=62.6 was simulated in the new simulation system on the platform of MSC.SuperForge.The distributions of velocity field,effective stress field,effective strain field and temperature field,as well as the metal flowing during the extrusion process were obtained and analyzed.By comparing with producing test,the results of virtual extrusion based on numerical simulation are helpful to the design and optimization of extrusion die and process.更多还原