中文摘要：

In order to investigate the springback performance of a cold-rolled transformation-induced plasticity( TRIP) steel sheet during cyclic bending,three-points bending experiments were performed. The specimen was firstly forward bended and then reversed bended according to three basic punch strokes,10 mm,20 mm and 30 mm,respectively. The outlines of the deformed specimens,punch load and crosshead displacement were obtained. The experimental procedures and the method of determining the springback displacement were reported in detail. The contribution of the strain hardening and decrease of elastic modulus to the overall springback was explained. The results demonstrated that springback increases both with the cycles and with the punch stroke during the cyclic bending process. Furthermore,springback in forward bending is larger than that in the corresponding reverse bending. This may be helpful to understand the complex springback behavior of the complicated sheet metal panels.更多还原

英文摘要：

In order to investigate the springback performance of a cold-rolled transformation-induced plasticity （TRIP） steel sheet during cyclic bending, three-points bending experiments were performed. The specimen was firstly forward bended and then reversed bended according to three basic punch strokes, 10 mm, 20 mm and 30 mm, respectively. The outlines of the deformed specimens, punch load and crosshead displacement were obtained. The experimental procedures and the method of determining the springback displacement were reported in detail. The contributi~m of the strain hardening and decrease of elastic modulus to the overall springback was explained. The results demonstrated that springback increases both with the cycles and with the punch stroke during the cyclic bending process. Furthermore, springback in forward bending is larger than that in the corresponding reverse bending. This may be helpful to understand the complex springback behavior of the complicated sheet metal pancls.