Transactions of Materials and Heat Treatment

Title：FEM modeling and experimental of NC bending process of thin-wall tube with large diameter and small bending radius

Authors： LI Heng YANG He ZHAN Mei KOU Yong-le GU Rui-jie(College of Materials Science and Engineering Northwestern Polytechnical University Xi'an Shaanxi 710072 China)

Unit：

KeyWords： tube bending FE modeling experiment large diameter thin-wall tube

ClassificationCode：TG386

year,vol(issue):pagenumber：2006,31(5):136-139

Abstract：

With the increasingly insistent demand for the thin-wall tube with large diameter and small bending radius in the field of aerospace industry,a whole 3D explicit FEM model of the bending process including bending,retracting and unloading(springback) has been established based on the experiment and analytical research with the dynamic explicit FEM code ABAQUS/Explicit.In the modeling,the bending process for 50mm×1mm(out diameter×wall thickness) series of stainless and aluminum tubes are considered.Then combined with the experimental comparison,the difficulty faced with in FE modeling and the corresponding resolving method are discussed.

Funds：

国家杰出青年科学基金(50225518);; 国家自然科学基金(59975016、50175092);; 高等学校优秀青年教师教学科研奖励计划与高校博士点基金(20020699002);; 航空科学基金资助项目(04H53057)

Reference：

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[4]Li H,Yang H,Zhan M,et al.Wrinkling limit based on FEM vir-tual experiment during NC bending process of thin-walled tube[J].Materials Science Forum,2004,471 472:498 502.
[5]Information on http://www.bendtooling.com/bending_for-mulas.htm.

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