有限体积法仿真金属塑性成形的关键技术

基于有限体积基本原理，对有限体积法模拟金属塑性成形中初始边值条件的生成、材料变形行为的动态跟踪描述、动态边界条件的处理等技术进行了详细的研究。探讨了有限体积网络体系的建立、模具及工件几何外形的描述、初始速度边界条件的获取以及摩擦边界条件的施加等问题，提出了表述变形体物理场量和跟踪描述变形体边界的技术路线，同时给出了选取时间加载步长以及处理动态接触约束条件的技术处理方法。从而有效地解决了有限体积法仿真金属塑性成形的关键技术问题。

Key Technologies for Simulation of Metal Forming Process with Finite Volume Method

Based on the theory of finite volume method(FVM), technologies of preparing initial simulation data, tracking material deformation behavior and dealing with dynamical contacted boundary conditions were studied. How to set up the FVM meshes, build the mathematical models of die and workpiece, get the initial velocity boundaries and add on the friction boundaries were carried out. Methods of calculating variables of the flowing material and tracking the material deformation boundary were given. Technologies of determining the time step and treating the contacting boundary conditions dynamically were also provided. So, a series of key technological problems can be solved in the simulation of metal forming process with FVM.