论文部分内容阅读
针对汽车联轴节壳体温挤压成形过程，采用三维刚－粘塑性有限元法进行了热力耦合数值模拟以揭示金属的塑性变形行为，从而为模具设计及工艺制订提供理论依据．通过有限元模拟，给出了汽车联轴节壳体三维温挤压成形过程的金属塑性流动模式和详尽的应力、应变及温度分布，并分析了成形物理场分布与变形的外部条件之间的关系．同时也对三维塑性变形的有限元技术处理方法（如：模具的几何描述及变形体的离散化、三维动态边界接触问题）进行了探讨．
Aiming at the thermo-compression forming process of the automobile coupling shell, the three-dimensional rigid-viscoplastic finite element method was used to conduct numerical simulation of thermal coupling to reveal the plastic deformation behavior of the metal, thus providing a theoretical basis for mold design and process formulation. Through the finite element simulation, the metal plastic flow pattern and detailed stress, strain and temperature distribution in the three-dimensional warm extrusion process of the automobile coupling shell are given. The relationship between the distribution of the forming physical field and the external conditions of the deformation relationship. At the same time, the finite element method of three-dimensional plastic deformation (such as the geometric description of molds, the discretization of deformable bodies and the three-dimensional dynamic boundary contact problem) is also discussed.