A closed form technique to predict springback in creep age-forming
A closed form technique to predict springback in creep age-forming
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DOI：
10.1016/j.ijmecsci.2006.01.005
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发表时间：
2006-06
影响因子：
7.3
通讯作者：
Pierre-Paul Jeunechamps;K. Ho;Jianguo Lin;J. Ponthot;T. Dean
中科院分区：
文献类型：
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作者：
Pierre-Paul Jeunechamps;K. Ho;Jianguo Lin;J. Ponthot;T. Dean
开发并编制了一种预测铝壳件蠕变时效成形回弹的有效数值方法。在150°C下确定的基于物理的统一蠕变老化本构方程用于评估CAF过程中的时效硬化和蠕变变形。研究主要集中在铝板的纯弯曲。研究了板厚、单曲率和双曲率弯曲、时效时间和应力松弛特性对回弹的影响。结果表明，该算法能够准确地预测回弹，并给出了几何数据与回弹之间的关系。
An efficient numerical method has been developed and programmed to predict springback in creep age-forming (CAF) of aluminium shell components. Physically based unified creep-ageing constitutive equations determined for AA7010 at 150°C are used to evaluate age-hardening and creep deformation in CAF processes. The studies are mainly concentrated on the pure bending of aluminium plates. Effects of plate thickness, single and double curvature bending, ageing time and stress relaxation features on springback are investigated. It is shown that the proposed algorithm can predict springback accurately and gives a relationship between geometrical data and springback.