Transactions of Materials and Heat Treatment

Title：Study on the springback law of high strength steel U-shaped part considering Bauschinger effect

Authors： Wang Menghan Yue Zongmin Wang Gentian

Unit： Chongqing University

KeyWords： high strength steel spring-back Bauschinger effect response surface analysis numerical simulation

ClassificationCode：TG386

year,vol(issue):pagenumber：2016,41(2):58-63

Abstract：

Springback has hindered the application of high strength steel sheet seriously. The accuracy of numerical simulation on HSS sheet springback depends on the description of Bauschinger effect by the implemented material model. The mechanical analysis, numerical simulation and response surface method were applied to study the springback prediction for U-shaped part of high strength steel sheet. Material model based on Bauschinger effect enabled a high-precision simulation to predict springback, then the influence of the blank holder force, friction coefficient and fillet radius of die on springback was studied. The result indicates that, when friction coefficient is smaller, the springback value decreases with the increase of blank holder force, and while the friction coefficient is larger, the springback value increases with the increase of blank holder force. Therefore, the appropriate selection of fillet radius of die can observably diminish the springback value of part.

Funds：

中央高校基本科研业务费资助（CDJZR14130006）

王梦寒（1975-），女，博士，副教授

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