Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第23卷    第8期    总第173期    2013年8月

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文章编号:1004-0609(2013)08-2104-06
7055铝合金加筋板蠕变时效成形有限元仿真
湛利华1,许晓龙2,贾树峰2,阳 凌2

(1. 中南大学 机电工程学院,长沙 410083;
2. 中南大学 高性能复杂制造国家重点实验室,长沙 410083
)

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。

 

关键字: 7055铝合金;蠕变时效成形;有限元仿真;回弹

Finite element simulation for creep age forming of 7055 aluminum alloy stiffened panel
ZHAN Li-hua1, XU Xiao-long2, JIA Shu-feng2, YANG Ling2

1. School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;
2. State Key Laboratory of High Performance Complex Manufacturing, Central South University,
Changsha 410083, China

Abstract: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.

 

Key words: aluminum alloy 7055; creep age forming; finite element simulation; springback

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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