Transactions of Materials and Heat Treatment

Title：Prediction of wrinkling in flexible roll forming based on finite element simulation

Authors： WANG Ting HAN Fei

Unit： North China University of Technology

KeyWords： flexible roll forming compressed flange instability wrinkling numerical simulation

ClassificationCode：TG306;TG335.4

year,vol(issue):pagenumber：2013,38(6):67-72

Abstract：

In order to research the wrinkling occurred in the sheets convex arc of roll forming with variable cross-section, the C-B wrinkling criterion used in the prediction of flange wrinkling was changed specially. Based on the new C-B wrinkling criterion, a special wrinkling factor was put forward to evaluate the wrinkling extent and a wrinkling evaluation factor fringe was output from the finite element simulation to show the whole sheets steadystate and predict the onset of wrinkling. According to the wrinkling factor, the influences of sheet thickness, arcradius, flange height and centralangle on the wrinkling were researched to give some ideas to the process design. The experimental result of the finite element simulation was exactly the same as the conclusion which was gained from the theoretical derivation. It is proved that the new C-B wrinkling criterion is suitable to predict the roll forming wrinkling.

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)

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