板料冲压成形回弹的数值模拟

Numerical Simulation of Springback in Sheet Metal Forming

回弹是板料成形过程中不可避免的现象 .回弹的数值模拟作为解决回弹问题的有效方法 ,越来越受到工业界和学术界的重视 .完整的回弹数值模拟分为 2步 ,即冲头加载成形过程模拟和冲头卸载回弹过程模拟 .本文比较了静力隐式和动力显式 2种算法在计算回弹问题时的优劣 ,采用静力隐式算法建立了计算冲头加载成形过程模拟和冲头卸载回弹过程模拟的有限元模型 ,并利用自行开发的软件给出了计算实例 .

Springback is an inevitable phenomenon in sheet metal forming process. As an effective method to solve springback problem, numerical simulation is receiving increasing attention throughout industry and academic world. Integrated springback simulation can be divided into two steps, that is punch loading forming process simulation and punch unloading springback process simulation. The quasi-static implicit approach and dynamic explicit approach in springback simulation are described, and their advantages and disadvantages in computing springback problems are compared. A FEM model for punch loading forming process simulation and punch unloading springback process simulation is introduced and a computing example using software developed by authors is given.