半球形凸模拉深过程的动力显式有限元分析

• 作 者: 刁法玺rrrrrrrrrn 张凯锋
• 机 构: 哈尔滨工业大学材料科学与工程学院,哈尔滨工业大学材料科学与工程学院 哈尔滨150001,哈尔滨150001
• 出 处: 塑性工程学报
• 发表日期: 2003年06期
• 关键词: 拉深过程 板料成形过程 有限元分析 动力显式 显式算法 压边圈 厚度分布 有限变形理论 收敛问题 拉深模具

本文基于连续介质力学及有限变形理论 ,建立了用于三维板料成形过程分析的有限元模型 ,开发了动力显式算法的板料成形过程模拟的有限元分析程序DESSFORM3D。采取集中质量矩阵 ,用动力显式积分的方法 ,使位移计算显式化 ,避免了由材料、几何、边界条件等高度非线性因素引起的计算收敛问题。对半球形凸模拉深过程进行模拟计算 ,并把模拟结果与实验结果进行对比 ,验证了软件的计算结果

Based on the theory of continuum mechanics and finite deformation, this paper established a finite element model for the analysis of three-dimensional sheet metal forming process and developed a finite element analysis program DESSFORM3D for sheet metal forming simulation. A centralized mass matrix is ​​adopted and the dynamic explicit integral method is adopted to make the displacement calculation explicit. This avoids the computational convergence caused by highly nonlinear factors such as material, geometry and boundary conditions. The process of drawing the hemispherical punch is simulated and the simulation results are compared with the experimental results to verify the calculation results of the software