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中文摘要：
基于铝合金时效成形机理的蠕变统一本构方程，应用大型商业化有限元软件 MSC.Marc，对其进行二次开发，实现7055铝合金加筋板蠕变时效成形过程仿真模拟，结合ATOS Professional软件分析加筋板成形后回弹率，并通过实验研究验证仿真结果的正确性。结果表明：单纯静力加载后加筋板的回弹量为16.14%，而经过蠕变时效后加筋板的回弹量降低为10.34%，筋条对构件蒙皮的回弹起到一定的抑制作用；蠕变时效后加筋板的几何形状是由筋板的塑性变形与构件的蠕变应变共同决定的。
英文摘要：
The creep unified constitutive equations based on aluminum alloy aging forming mechanism were further developed by the large scale commercial finite element software MSC.Marc, and 7055 aluminum alloy stiffened panel creep age forming process simulations were completely conducted. Then springback of the stiffened plate after forming was calculated by ATOS Professional software, and its correctness was verified by experimental studies. The results show that, the springback of the stiffened plate under the simple static load is 16.14%, while it reduces to 10.34%after creep age forming, which shows that ribs play some certain role on the springback of the skin in the process of creep age forming. And the geometry shape of the stiffened plate after creep age forming is jointly determined by the plastic deformation of the ribs and the creep strain of the workpiece.
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