Study on Influencing Factors of U-bending Springback Prediction of DP780 Dual-phase Steel

doi:10.3901/JME.2024.06.197

Abstract

Abstract: Springback is a key factor affecting the dimensional and shape accuracy of cold-formed high-strength steel parts, and the accuracy of high-strength steel springback prediction depends on the accurate material model, it is important to study the influence of the material model on springback prediction accuracy. Based on tension-compression tests with two different strain levels and multi-cycle tension-compression tests, the parameters of the DP780 dual-phase steel Yoshida-Uemori (Y-U) kinematic hardening model were determined. The influence of different hardening models and yield criteria on the U-bending springback prediction was analyzed by LS-DYNA finite element simulation software, and compared with the springback tests. The results show that the Y-U model parameters obtained by different tensile-compression test strategies have great differences, and the Y-U model obtained by the multi-cycle tensile-compression tests has higher prediction accuracy and the U-bending springback error can be controlled within 5%. With the increase of pre-strain, the elastic modulus of DP780 dual-phase steel decreases sharply and gradually becomes flat. The Y-U model considering elastic modulus degradation can improve the prediction accuracy of U-bending springback. Compared with the Swift isotropic hardening model, the Y-U kinematic hardening model combined with the Hill48 yield criterion can obtain higher springback prediction accuracy. The yield criterion has a certain influence on the springback prediction of DP780 dual-phase steel, but its influence on the springback accuracy is significantly lower than that of the hardening model. The research results provide a theoretical basis for the selection of advanced high-strength steel material models and the improvement of springback prediction accuracy.

Key words: dual-phase steel, Y-U model, yield criterion, elastic modulus, springback prediction

CLC Number:

TB125

ZHENG Xuebin, HAN Longshuai, LI Xuetao, E Hongwei, WU Xiangdong, WAN Min. Study on Influencing Factors of U-bending Springback Prediction of DP780 Dual-phase Steel[J]. Journal of Mechanical Engineering, 2024, 60(6): 197-206.

References

[1] 康永林，朱国明. 中国汽车发展趋势及汽车用钢面临的机遇与挑战[J]. 钢铁，2014，49(12)：1-7. KANG Yonglin，ZHU Guoming. Development trend of China’s automobile industry and the opportunities and challenges of steels for automobiles[J]. Iron and Steel，2014，49(12)：1-7.
[2] 赵征志，陈伟健，高鹏飞，等. 先进高强度汽车用钢研究进展及展望[J]. 钢铁研究学报，2020，32(12)：1059-1076. ZHAO Zhengzhi，CHEN Weijian，GAO Pengfei，et al. Progress and perspective of advanced high strength automotive steel[J]. Journal of Iron and Steel Research，2020，32(12)：1059-1076.
[3] 孔政，孔宁，张杰，等. 双相钢的力学性能和对成形极限的影响[J]. 机械工程学报，2017，53(12)：140-146. KONG Zheng，KONG Ning，ZHANG Jie，et al. Mechanical property of dual phase steel and its effect on the forming limit[J]. Journal of Mechanical Engineering，2017，53(12)：140-146.
[4] 崔俊佳，董东营，王琼，等. DP780双相钢电阻点焊接头动态载荷下失效行为研究[J]. 机械工程学报，2021，57(2)：70-79. CUI Junjia，DONG Dongying，WANG Qiong，et al. Failure behavior analysis of resistance spot welding joints of DP780 dual-phase steel under dynamic load[J]. Forging & Stamping technology[J]. Journal of Mechanical Engineering，2021，57(2)：70-79.
[5] 逯若东，程超，陈自凯. DP490双相钢车门外板应用研究[J]. 锻压技术，2020，45(5)：110-115. LU Ruodong，CHENG Chao，CHEN Zikai. Research on DP490 dual phase steel application in door outer panel[J]. Forging & Stamping Technology，2020，45(05)：110-115.
[6] 谢延敏，张飞，王子豪，等. 基于渐变凹模圆角半径的高强钢扭曲回弹补偿[J]. 机械工程学报，2019，55(2)：91-97. XIE Yanmin，ZHANG Fei，WANG Zihao，et al. Compensation of twist springback in high-strength steel based on gradient die radius[J]. Journal of Mechanical Engineering，2019，55(2)：91-97.
[7] 宋炳毅，孟宝，万敏. 金属薄板循环塑性强化模型及实验研究进展[J]. 精密成形工程，2019，11(3)：28-41. SONG Bingyi，MENG Bao，WAN Min. Research progress of cyclic plastic hardening model and experiment for metal Sheetss[J]. Journal of Netshape Forming Engineering，2019，11(3)：28-41.
[8] YOSHIDA F，UEMORI T. A model of large-strain cyclic plasticity describing the Bauschinger effect and workhardening stagnation[J]. International Journal of Plasticity，2002，18(5)：661-686.
[9] YOSHIDA F，UEMORI T. A model of large-strain cyclic plasticity and its application to springback simulation[J]. International Journal of Mechanical Sciences，2003，45(10)：1687-1702.
[10] LIN Jianping，HOU Yong，MIN Junying，et al. Effect of constitutive model on springback prediction of MP980 and AA6022-T4[J]. International Journal of Material Forming，2020，13(5)：1-13.
[11] MIN Junying，GUO Nan，HOU Yong，et al. Effect of tension-compression testing strategy on kinematic model calibration and springback simulation of advanced high strength steels[J]. International Journal of Material Forming，2021，14(5)：435-448.
[12] 李小强，董红瑞，于长旺，等. 不同屈服准则与硬化模型对DP780双相高强钢拉延弯曲回弹预测影响规律研究[J]. 机械工程学报，2020，56(12)：42-55. LI Xiaoqiang，DONG Hongrui，YU Changwang，et al. Influence of yield criteria and hardening model on draw-bending springback prediction of DP780[J]. Journal of Mechanical Engineering，2020，56(12)：42-55.
[13] 王彦菊，李神龙，贺炜林，等. 高温合金超薄板循环塑性本构模型适用性研究[J]. 材料工程，2021，49(11)：147-155. WANG Yanju，LI Shenlong，HE Weilin，et al. Applicability analysis of cyclic plasticity constitutive model for superalloy foils[J]. Journal of Materials Engineering，2021，49(11)：147-155.
[14] BARLAT F，GRACIO J，LEE M G，et al. An alternative to kinematic hardening in classical plasticity[J]. International Journal of Plasticity，2011，27(9)：1309-1327.
[15] LEE J Y，LEE J W，LEE M G，et al. An application of homogeneous anisotropic hardening to springback prediction in pre-strained U-draw/bending[J]. International Journal of Solids and Structures，2012，49(25)：3562-3572.
[16] CHABOCHE J L. Constitutive equations for cyclic plasticity and cyclic viscoplasticity[J]. International Journal of Plasticity，1989，5(3)：247-302.
[17] 晏佳伟，胡启，王振振，等. 不同硬化模型对第3代超高强度钢板冲压回弹预测的比较究[J]. 上海交通大学学报，2017，51(11)：1334-1339. YAN Jiawei，HU Qi，WANG Zhenzhen，et al. A comparison study of different hardening models in springback prediction for stamping of the third generation ultra high strength steel[J]． Journal of Shanghai Jiaotong University，2017，51(11)：1334-1339.
[18] YOSHIDA F，UEMORI T，FUJIWARA K. Elastic-plastic behavior of steel sheets under in-plane cyclic tension-compression at large strain[J]. International Journal of Plasticity，2002，18：633-659.
[19] XUE Xin，LIAO Juan，VINCZE G，et al. Experimental assessment of nonlinear elastic behaviour of dual-phase steels and application to springback prediction[J]. International Journal of Mechanical Sciences，2016，117：1-15.
[20] CHANG Y，WANG N，WANG B T，et al. Prediction of bending springback of the medium-Mn steel considering elastic modulus attenuation[J]. Journal of Manufacturing Processes，2021，67：345-355.
[21] KIM H，KIM C，BARLAT F，et al. Nonlinear elastic behaviors of low and high strength steels in unloading and reloading[J]. Materials Science and Engineering A，2013，562：161-171.
[22] HILL R. A theory of the yielding and plastic flow of anisotropic metals[J]. Proc. R. Soc. Lond. A. Math. Phys. Sci.. 1948，193(1033)：281-297.
[23] BARLAT F，LIAN K. Plastic behavior and stretchability of sheet metals，Part I：a yield function for orthotropic sheet under plane stress conditions[J]. International Journal of Plasticity，1989，5(1)：51-60.
[24] BARLAT F，BREM J C，YOON J W，et al. Plane stress yield function for aluminum alloy sheets-part 1：theory[J]. International Journal of Plasticity，2003，19(9)：1297-1319.
[25] 王海波，万敏，阎昱，等. 参数求解方法对屈服准则的各向异性行为描述能力的影响[J]. 机械工程学报，2013，49(24)：45-53. WANG Haibo，WAN Min，YAN Yu，et al. Effect of the solving method of parameters on the description ability of the yield criterion about the anisotropic behavior[J]. Journal of Mechanical Engineering，2013，49(24)：45-53.