锻压技术

考虑包辛格效应的高强钢U型件冲压回弹规律分析

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

作者：王梦寒岳宗敏王根田

单位：重庆大学

分类号：TG386

出版年,卷(期):页码：2016,41(2):58-63

摘要：

回弹问题限制高强钢的广泛使用。数值模拟预测高强钢回弹的精度很大程度上取决于所应用的材料模型是否能对材料的包辛格效应准确描述。本研究旨在将力学解析方法、数值模拟技术、响应面分析法综合应用于高强度薄钢板U型件冲压回弹的预测中。基于考虑包辛格效应的材料模型实现高精度模拟预测回弹，随后利用理论解析方法结合有限元模拟与响应面法分析压边力、摩擦系数、模具圆角半径对回弹的影响规律。结果表明，摩擦系数较小时，板料的回弹程度随压边力的增大而减小；而摩擦系数较大时，板料的回弹程度随压边力的增大而增大。选择合适的模具圆角半径可以显著减小零件的回弹量。

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.

基金项目：

中央高校基本科研业务费资助（CDJZR14130006）

王梦寒（1975-），女，博士，副教授

参考文献：

[1]余海燕. 金属薄板应变硬化模型比较分析[J]. 锻压技术,2012,37（5）:1-6.Yu H Y. Comparative study on strain hardening models of thin metal sheet [J]. Forging & Stamping Technology, 2012,37（5）:1-6.

[2]Gau J T, Kinzel G L. A new model for spring-back prediction in which the Bauschinger effect is considered[J]. International Journal of Mechanical Sciences, 2001,43:1813-1832.

[3]Shen H, Li S, Chen G. Numerical analysis of panels'dent resistance considering the Bauschinger effect[J]. Materials and Design, 2010,31: 870-876.

[4]阮光明. 基于响应面法的DP800高强钢冲压回弹工艺参数优化[J]. 锻压技术, 2015, 40(4):40-44.Nguyen Quang Minh. Technological parameters optimization of springback for DP800 high strength steel based on response surface method[J]. Forging & Stamping Technology, 2015, 40(4):40-44.

[5]Yoshida F, Uemori T. A model of larges train cyclic plasticity describing the Bauschinger effect and work hardening stagnation[J]. International Journal of Plasticity, 2002,18: 661-686.

[6]Grilo T J, Souto N, Valente R A F, et al. On the development and computational implementation of complex constitutive models and parameters identification procedures[J]. Key Engineering Maetrials,2013,554-557:936-948.

[7]Martin Bker. A new method to determine material parameters from machining simulations using Inverse identification[J]. Procedia CIRP，2015,31: 399-404.

[8]Tomonari Furukawa, Tomohiro Sugata, Shinobu Yoshimura,et al. An automated system for simulation and parameter identification of inelastic constitutive models[J]. Computer Methods in Applied Mechanics and Engineering, 2002, 191: 2235-2260.

[9]张璐. 高强钢回弹预测中材料模型的适用性研究及回弹补偿的自动实现[D]. 上海:上海交通大学,2012.Zhang L. Effects of Material Models on Springback Predictions and Compensations in Stamping Advanced High-Strength Steels (AHSS) [D]. Shanghai: Shanghai Jiaotong University, 2012.

[10]肖华,刘艳,汤禹成,等. 高强度钢冲压回弹量对板料力学性能参数的灵敏度分析[J]. 锻压装备与制造技术,2007,42(2):69-72.Xiao H, Liu Y, Tang Y C, et al. Sensitivity analysis of effect of material properties to spring-back of high strength steel[J]. China Metal Forming Equipment & Manufacturing Technology,2007,42(2):69-72.

服务与反馈：

【文章下载】【加入收藏】