复杂型面板料成形数值模拟快速有限元建模

提出并实现了直接从测量到的空间散乱点直接生成有限元网络的新方法，使具有大尺寸复杂型面金属板料冲压成形整个数值模拟有限元建模的工作量大大降低，并使得建模的自动化程度提高。为了解决建模过程中初始坯料形状未知的问题，比较了不同的初始毛坯预测方法，提出用一步模拟法从已得到模具的有限元网格进行反推，预测出毛坯的基本形状和尺寸。

Rapidly FEM Modeling ofSheet Metal with Complex Shape for Stamping Simulation

For the sheet metal with large size and complex geometry shape such as autopanel, it is always a difficult and time consuming work to set up the FEM model of numerical simulation of stamping process. In the paper, the methods of modeling the FEM model of sheet with complex shape for stamping simulation were introduced. Based on the procedure of sheet metal forming numerical simulation, a new method directly creating FEM mesh from the scanned data was presented. The new method dramatically decreases the workload and enlarges the robustness of the modeling process. For dealing with the problem of the initial blank geometry is not clear, some predict methods were compared.