锻压技术

冲击载荷下中碳低合金钢的动态力学性能与JC本构模型的改进

英文标题：Dynamic mechanical properties of medium carbon low alloy steel and improvement of J-C constitutive model under impact load

作者：黄东英徐亮刘晓红

单位：广西大学柳州柳新汽车冲压有限公司

关键词：中碳低合金钢动态力学性能 JC本构模型冲击压缩应变速率效应

分类号：TG156

出版年,卷(期):页码：2021,46(11):225-230

摘要：

对淬火和高温回火的中碳低合金钢进行准静态室温拉伸实验以及不同应变速率下的室温冲击压缩实验，发现中碳低合金钢具有明显的应变速率敏感效应与增塑效应。为了建立能真实反映中碳低合金钢在较强冲击载荷下塑性变形特征的本构模型，通过引进绝热温升热软化项，以及修正应变速率敏感系数来改进传统的JohnsonCook (JC)本构模型，并采用多变量线性拟合与遗传算法（GA）求解模型参数。结果显示：在不同应变速率下，改进的JC本构模型结果与实验结果吻合效果较好。表明改进的JC本构模型可以很好地描述中碳低合金钢在动态冲击载荷下的力学行为，为工程中采用数值模拟方法研究中碳低合金钢的动态力学行为提供理论参考。

he quasi-static tensile tests and impact compression tests under different strain rates at room temperature were carried out on quenched and high-temperature tempered medium carbon low-alloy steel, and it is found that the material has obvious strain rate sensitive effect and plasticizing effect. In order to establish a constitutive model, which could truly reflect the plastic deformation characteristics of medium carbon low alloy steel under strong impact load, the traditional Johnson-Cook (J-C) constitutive model was revised by adding the thermal softening term of adiabatic temperature rise（ATR）and modifying the strain rate sensitive coefficient, and the model parameters were solved by multi-variable linear fitting and genetic algorithm (GA). The research shows that the results of the improved J-C constitutive model are in good agreement with the experimental results under different strain rates, and the improved J-C constitutive model well describes the mechanical behavior of medium carbon low alloy steel under dynamic impact load, which provides theoretical reference for the use of numerical simulation method in engineering to study the dynamic mechanical behavior of medium carbon low alloy steel.

基金项目：

广西大学有色金属及特色材料加工重点实验室开放基金（2020GXYSOF14）

作者简介：黄东英（1994-），女，硕士研究生，E-mail：1811301007@st.gxu.edu.cn；通信作者：刘晓红（1980-），女，硕士，副教授，硕士生导师，E-mail：liuxiaohong@gxu.edu.cn

参考文献：

[1]刘旭红，黄西成，陈裕泽，等. 强动载荷下金属材料塑性变形本构模型评述[J]. 力学进展， 2007, 37(3): 361-374.

Liu X H, Huang X C, Chen Y Z, et al. A review on constitutive models for plastic deformation of metal materials under dynamic loading [J]. Advances in Mechanics, 2007, 37 (3): 361-374.

[2]常列珍，潘玉田，张治民，等. 一种调质50SiMnVB钢JohnsonCook本构模型的建立[J]. 兵器材料科学与工程，2010，33(4): 68-72.

Chang L Z，Pan Y T，Zhang Z M，et al. JohnsonCook constitutive model for hardened and tempered 50SiMnVB steel [J]. Ordnance Material Science and Engineering，2010，33(4): 68-72.

[3]汪振兴，田晓耕，干聪，等.单轴压缩下U75V钢动态力学行为及其修正JC本构模型[J]. 材料热处理学报，2019，40(7): 156-164.

Wang Z X，Tian X G， Gan C，et al. Dynamic mechanical behavior of U75V steel under uniaxial compression and its modified JC constitutive model [J]. Transactions of Materials and Heat Treatment，2019，40(7): 156-164.

[4]王佳斌，丁军，宋鹍，等. 冲击载荷下20CrMnTi钢动态应力响应与考虑绝热温升修正JC本构模型研究[J]. 机械强度，2019，41(5): 1066-1070.

Wang J B，Ding J，Song K，et al. Studied on dynamic stress response of 20CrMnTi steel under impact load and considered for adiabatic temperature rise modification of the JC constitutive model [J]. Journal of Mechanical Strength，2019，41(5): 1066-1070.

[5]邓云飞，张永，吴华鹏，等. 6061T651铝合金动态力学性能及JC本构模型的修正[J]. 机械工程学报, 2020, 56(20): 74-81.

Deng Y F，Zhang Y，Wu H P，et al. Dynamic mechanical properties and modification of JC constitutive model of 6061T651 aluminum alloy [J]. Journal of Mechanical Engineering, 2020, 56(20): 74-81.

[6]肖黎，陶慧，方逸尘，等.多向锻造对中碳低合金钢磨料磨损性能的影响[J]. 热加工工艺，2018，47(5): 133-134,138.

Xiao L，Tao H，Fang Y C，et al. Effect of multidirection forging on abrasive wear resistance of medium carbon low alloy steel [J]. Hot Working Technology，2018，47(5): 133-134,138.

[7]许秀霞，罗明欢，黄彦天，等. 多向锻造及退火处理对中碳低合金钢磨料磨损性能的影响[J]. 热加工工艺，2016，45(23): 122-124,127.

Xu X X，Luo M H，Huang Y T，et al. Effect of multidirection forging and annealing treatment on abrasive wear resistance of medium carbon low alloy steel[J]. Hot Working Technology，2016，45(23): 122-124,127.

[8]罗明欢，许秀霞，黄彦天，等. 多向强应变及退火处理对中碳低合金钢组织和性能的影响[J]. 热加工工艺，2016，45(21): 125-127.

Luo M H，Xu X X，Huang Y T，et al. Effect of multidirectional strong strain and annealing treatment on microstructure and properties of medium carbon low alloy steel [J]. Hot Working Technology，2016，45(21): 125-127.

[9]GB/T 228.1—2010, 金属材料拉伸实验第1部分：室温试验方法[S].

GB/T 228.1—2010, Metallic materials—Tensile testing—Part 1: Method of test at room temperature [S].

[10]徐亮. 中碳低合金钢磨料磨损预测模型的研究[D]. 南宁：广西大学，2018.

Xu L. Study on Prediction Model of Abrasive Wear of Medium Carbon Low Alloy Steel[D]. Nanning: Guangxi University, 2018.

[11]GJB 5365—2005, 金属材料动态压缩试验方法[S].

GJB 5365—2005, Dynamic compression test method for metallic materials [S].

[12]卢芳云. 霍普金森杆实验技术[M]. 北京: 科学出版社, 2013.

Lu F Y. Hopkinson Rod Experiment Technique [M]. Beijing: Science Press, 2013.

[13]Johnson G R，Cook W H. A constitutive model and data for metals subjected to large strains，high strain rates and high temperature[A]. Proceedings of the 7th International Symposium on Ballistics[C]. The Hague，Netherlands，1983.

[14]Kapoor R，NematNasser S. Determination of temperature rise during high strain rate deformation[J]. Mechanics of Materials. 1998, 27(1): 1-12.

[15]李定远，朱志武，卢也森. 冲击加载下42CrMo钢的动态力学性能及其本构关系[J]. 高压物理学报. 2017，31(6): 761-768.

Li D Y，Zhu Z W，Lu Y S. Dynamic mechanical properties and constitutive relationship of 42CrMo steel under impact loading [J]. Chinese Journal of High Pressure Physics，2017, 31 (6): 761-768.

[16]葛继科，邱玉辉，吴春明，等. 遗传算法研究综述[J]. 计算机应用研究， 2008, 25(10): 2911-2916.

Ge J K，Qiu Y H，Wu C M，et al. Review of genetic algorithm research [J]. Application Research of Computer，2008，25 (10): 2911-2916.

[17]张赛，孟庆振，谢书港，等. B250P1低合金钢的动态力学行为及其本构模型[J]. 理化检验:物理分册, 2016，52(6): 370-374.

Zhang S，Meng Q Z，Xie S G，et al. Dynamic mechanical behavior and constitutive model of B250P1 low alloy steel [J]. Physical and Chemical Examination: Physics Division, 2016，52 (6): 370-374.

[18]俞秋景，刘军和，张伟红，等. Inconel 625合金JohnsonCook本构模型的一种改进[J]. 稀有金属材料与工程, 2013， 42(8): 1679-1684.

Yu Q J，Liu J H，Zhang W H，et al. An improved Johnson-Cook constitutive model for Inconel 625 alloy [J]. Rare Metal Materials and Engineering，2013，42 (8): 1679-1684.

[19]胡昌明，贺红亮，胡时胜. 45号钢的动态力学性能研究[J]. 爆炸与冲击， 2003，23(2): 188-192.

Hu C M，He H L，Hu S S. Study on dynamic mechanical properties of 45 steel [J]. Explosion and Shock Waves，2003，23 (2): 188-192.

服务与反馈：

【文章下载】【加入收藏】