铝合金型材弯曲成型及回弹数值模拟研究
Numerical Simulation Research on Bending Forming and Springback of Aluminum Alloy Profile

铝合金作为汽车轻量化的主要材料，具有广泛的应用前景，如何准确评价铝合金型材弯曲成型及回弹性能对于工业生产具有重大的应用价值。针对铝合金型材的弯曲回弹，本文采用ABAQUS数值软件进行了有限元模拟，并将模拟结果与实验结果对比分析，验证模拟的可靠性。利用仿真结果获得了型材弯曲回弹时应力、应变的变化情况，给出了阻尼系数与回弹量误差之间的关系。结果表明，回弹前各部位对应的应力、应变值均大于回弹后的，应力、应变最大处基本在同一位置。回弹偏差受到阻尼系数的影响，误差最小在10%，因此数值模拟对实际产品生产有一定指导意义。
As the main material for automobile lightweight, aluminum alloy has a wide range of application prospects. Accurate evaluation of the bending forming and resilience performance of aluminum alloy profiles has great application value for industrial production. Aiming at the bending springback of aluminum alloy profiles, ABAQUS numerical software was used in this paper to carry out finite element simulation, and the simulation results were compared with the experimental results to verify the reliability of the simulation. The simulation results were used to obtain the stress and strain changes of the profile during bending and springback, and the relationship between the damping coefficient and the springback error was given. The results show that the corresponding stress and strain values of each part before springback are larger than those after springback, and the maximum stress and strain are basically at the same position. The springback deviation is affected by the damping coefficient, and the minimum error is 10%. Therefore, numerical simulation has certain guiding significance for actual product production.