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Liu Yuqi
State Key Laboratory of Plastic Forming Simulation and Die &
Mould Technology, Huazhong University of Science
and Technology,
Wuhan 430074, China
Liu Junhua
Civil Engineering &
Mechanics,
Huazhong University of Science
and Technology,
Wuhan 430074, China
Hu Ping
Li Yunxing
Department of Applied
Mechanics,
Jilin University,
Changchun 130025, China
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QUANTITATIVE PREDICTION FOR
SPRINGBACK OF UNLOADING AND
TRIMMING IN SHEET METAL
STAMPING FORMING*
Abstract: Based on the elastic-plastic large deformation finite element formulation as well as the shell element combined discrete Kirchhoff theoretical plate element (DKT) with membrane square element, deep-drawing bending springback
of typical U-pattern is studied. At the same time the springback values of the drawing of patterns’ unloading and trimming about the satellite aerial reflecting surface are predicted and also compared with those of the practical punch. Above two springbacks all obtain satisfactory results, which provide a kind of effective quantitative pre-prediction of springback for the practical engineers.
Key words:
Sheet metal stamping forming Unloading
springback Trimming springback
Discrete kirchhoff theory(DKT) Finite element method
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