| Q355GNHD高耐候钢的动态高应变率塑性本构模型 |
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| 引用本文： | 张志龙,肖合婷,周伟.Q355GNHD高耐候钢的动态高应变率塑性本构模型[J].机车电传动,2021(1):63-68. |
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| 作者姓名： | 张志龙 肖合婷 周伟 |
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| 作者单位： | 中车青岛四方机车车辆股份有限公司,山东青岛 266111;中南大学轨道交通安全教育部重点实验室,湖南长沙 410075;轨道交通安全关键技术国际合作联合实验室,湖南长沙 410075;轨道交通列车安全保障技术国家地方联合工程研究中心,湖南长沙 410075 |
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| 基金项目： | 国家重点研发计划项目(2017YFB1201201)。 |
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| 摘 要： | Q355GNHD高耐候钢是先进轨道车辆车身的常用材料,其动态条件下的塑性本构模型对车身结构受力数值仿真至关重要。文章采用MTS 647 Hydraulic Wedge Grip和AutoCAE (HRST-I)高速试验机对Q355GNHD高耐候钢开展准静态、动态拉伸力学性能试验,获取了该型材料在0.001~500s-1应变率下的应力应变曲线;通过对该高耐候钢在应变率效应下受载变形规律的分析,确定了应变率加载效应;构建了应变率相关的Johnson-Cook硬化模型,确定了本构表征参数;最后运用ABAQUS平台,验证了模型的正确性。
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| 关 键 词： | 高耐候钢 高速列车 动态效应 应变率效应 本构模型 有限元分析 仿真 |
Dynamic High Strain Rate Plastic Constitutive Model of Q355GNHD High Weathering Steel |
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| ZHANG Zhilong,XIAO Heting,ZHOU Wei.Dynamic High Strain Rate Plastic Constitutive Model of Q355GNHD High Weathering Steel[J].Electric Drive For Locomotive,2021(1):63-68. |
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| Authors: | ZHANG Zhilong XIAO Heting ZHOU Wei |
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| Institution: | (CRRC Qingdao Sifang Co.,Ltd.,Qingdao,Shandong 26111 China;Key Laboratory of Trafic Safety on Track,Ministry of Education.Ccntral South University,Changsha,Hunan 410075,China;Joint Intermational Reserch Laboratory of Key Technology for Rail Trfic Safety Changsha,Hunan 410075.China;National&Local Joint Enginccring Rescarch Center of Safety Technology for Rail Vchicle,Changsha,Hunan 410075,China) |
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| Abstract: | Q355GNHD high weathering steel is a commonly used material for advanced rail vehicle body, the plastic constitutive model of which under dynamic conditions is of great significance for the numerical simulation of vehicle body stress. The experiments on quasi-static and dynamic tensile mechanical properties of Q355GNHD high weathering steelis were carried out by MTS 647 Hydraulic Wedge Grip and AutoCAE(HRST-I) high-speed testing machine. The stress-strain curves of the material at 0.001-500 s-1 strain rate were obtained through the experiments. The strain rate loading effect was determined by analyzing the deformation law of the high weathering steel under the strain rate effect. Then, the strain rate related Johnson-Cook hardening model was constructed and the constitutive parameters were determined. Finally, the correctness of the model was verified by ABAQUS platform. |
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| Keywords: | high weathering steel high-speed train dynamic effect strain rate effect constitutive model FEA simulation |
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