Transactions of Materials and Heat Treatment

Title：Research on simulation of flexible rollforming based on RIK hardening model

Authors： LONG Rui-fen HAN Fei LIU Ji-ying

Unit： North China University of Technology

KeyWords： nonlinear rotational and kinematic hardening model flexible rollforming FEM VUMAT subroutine wrinkling

ClassificationCode：TG386.3+1

year,vol(issue):pagenumber：2011,36(4):44-50

Abstract：

According to the technology characteristics of repeated loading unloading during flexible roll forming, based on the development technique of VUMAT, Fortran language was employed to develop a module for the nonlinear rotational and kinematic (RIK) hardening to consider the Crossing and Bauschinger effects, and flexible roll forming process was simulated on ABAQUS/Explicit software platform. The effect of hardening model on flexible roll forming was studied, and a critical wrinkling stress analysis model of sheet in flexible roll forming was established to investigate the influence of the material parameters and forming process parameters on wrinkling .The results show that non linear rotational and kinematic hardening model can well illustrate the characteristics of flexible roll forming process and wrinkling phenomenon.

Funds：

国家自然科学基金资助项目(50905001)；北京市优秀人才培养资助项目(2009D005002000003)

Reference：

[1] Choi Y. Modeling Evolution of Anisotropy and Hardening for Sheet Metals[D].Ohio：The Ohio State University,2003.

[2] Chun B K, Jinn J T, Lee J K. Modeling of the Bauschinger effect for sheet metals, part I: theory[J].International Journal of Plasticity, 2002, 18:571-595.

[3] Chun B K, Kim H Y, Lee J K. Modeling of the Bauschinger effect for sheet metals, part II: applications[J].International Journal of Plasticity, 2002, 18:597-616.

[4] Barlat F,Brem J C,Yoon J W, et al. Plane stress yield function for aluminum alloy sheets，part 1: theory [J].International Journal of Plasticity, 2003, 19:1297-1319.

[5] Yoon J W, Barlat F, Robert E D,et al. Plane stress yield function for aluminum alloy sheetspart II: FE formulation and its implementation[J].International Journal of Plasticity ，2004, 20:495–522.

[6] 王军杰.基于材料混合硬化模型的辊弯成形过程仿真研究[D] .上海：上海交通大学，2007.

[7] 丁新桥.柔性辊弯成形仿真研究[D] .北京：北方工业大学，2010.

[8] 于帅.Flexible Roll Forming 工艺技术研究与实验[D] .北京：北方工业大学，2010.

[9] Peter G,Arnd Z,Sebastian B, et al. Development and verification of a one step model for the design of flexible roll formed parts[J]. Int.J.Mater. Form., 2010, 1(S1):1-7.

[10] Wang C G,Tan H F,Du X W,et al. Wrinkling prediction of rectangular shell membrane under transverse in plane displacement[J] .International Journal of Solids and Structures, 2007, 44: 6507-6516.

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