A drawbead model with sheet metal passing through multiple bending-unbending processes was employed in this study to understand the springback phenomenon and to develop a numerical simulation technique for more accurate prediction of the springback process. The deformation process is simulated using an implicit finite element modeling code. The predicted results were compared with the physically measured ones, including clamping and restraining forces, thickness strains, and the curvatures of the deformed sheets. Consideration of the Bauschinger effect and employment of a combined isotropic and kinematic hardening models greatly improve the prediction accuracy. Stress and strain histories under various conditions during the drawing process are studied in detail in an attempt to provide a better basis for comparison for dynamic explicit solutions.
Stress and Strain Histories of Multiple Bending-Unbending Springback Process
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division July 24, 2001. Guests Editors: Jian Cao and Z. Cedric Xia.
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Huang , H., Liu, S., and Jiang, S. (July 24, 2001). "Stress and Strain Histories of Multiple Bending-Unbending Springback Process ." ASME. J. Eng. Mater. Technol. October 2001; 123(4): 384–390. https://doi.org/10.1115/1.1395574
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