论文部分内容阅读
通过对Ti-50A板材拉深过程的数值模拟,研究了参数选择与状态控制的基本途径,建立了对拉深过程进行数值模拟所用的几何模型。选择了壳单元为离散模型,采用映射网格划分技术对几何模型进行了网格划分,并对板料拉深数值模拟过程采用了自适应网格划分。针对Ti-50A钛合金给出了合适的材料本构模型。解决了加载、边界约束及求解过程当中最佳的时间和步长问题。利用接触理论和经典的库仑摩擦定律处理了模拟过程当中板坯与模具的接触与摩擦问题,最终完整地建立了符合实际的Ti-50A拉深成形过程数值模拟的有限元模型。通过有限元模拟与实际情况对比,验证了所提出的技术方案。
Through the numerical simulation of the drawing process of Ti-50A, the basic ways of parameter selection and state control are studied, and the geometric model for numerical simulation of drawing process is established. The shell element is chosen as the discrete model, the geometric model is meshed using the mapping meshing technique, and the adaptive meshing is applied to the numerical simulation of sheet metal drawing. A suitable material constitutive model is given for Ti-50A titanium alloy. Solve the load, the boundary constraints and the best time and step solving process problems. The contact theory and the classical Coulomb friction law were used to deal with the contact and friction between the slab and the mold during the simulation process. Finally, the finite element model of the Ti-50A deep drawing process was established. Through the finite element simulation and the actual situation comparison, verify the proposed technical solutions.