李睿;刘磊;张志华;王远;
LI Rui;LIU Lei;ZHANG Zhi-hua;WANG Yuan;Faulty of Land and Resources Engineering, Kunming University of Science and Technology;Key Laboratory for Development and Utilization of Sino German Blue Mine and Special Underground Space in Yunnan Province;China Railway 19th Bureau Group Rail Transit Engineering Co., Ltd.;

• 1:昆明理工大学国土资源工程学院
• 2:云南省中-德蓝色矿山与特殊地下空间开发利用重点实验室
• 3:中铁十九局集团轨道交通工程有限公司

摘要(Abstract)：

为对高温后大理岩动态压缩实验结果进行验证并探索数值模拟方法，采用“参考-计算-试算-调整”的方法基于HJC本构模型对不同温度等级高温处理后大理岩材料模型参数进行确定，利用ANSYS/LS-DYNA数值模拟软件对高温处理后大理岩SHPB实验进行数值模拟，并将数值模拟结果与室内实验结果进行对比分析。结果表明，数值模拟结果与室内实验结果具有一致性；大理岩试件破坏呈现裂隙由边缘向中心发展的趋势，表现为先以劈裂拉伸破坏产生裂隙进而进一步完全破坏，这种现象在实验过程中往往因观察区间较短容易被忽视；HJC本构模型可以有效地表征大理岩试件各项物理力学性质；通过对部分模型参数修改可以有效地对不同等级高温处理后大理岩试件物理力学参数描述；温度的损伤效应对于大理岩试件动态冲击破坏形态的影响体现在破碎后细粒量，随着处理温度的升高，大理岩破碎后细粒也不断增多。
In order to verify the dynamic compression test results of marble after high temperature and explore the numerical simulation method, the method of "reference-calculation-trialcalculation-adjustment" is used to determine the material model parameters of marble after high temperature of different temperature grades. The SHPB test of marble after high temperature is simulated by ANSYS/LS-DYNA numerical simulation software, and the numerical simulation results are compared with the indoor test results. The results show as follow. The numerical simulation results are consistent with the indoor test results. In the process of SHPB test, marble cracks show the trend of development from edge to center, which results from splitting and tensile failure to further failure, and this phenomenon is often neglected because of shorter observation interval. The HJC constitutive model can effectively characterize the physical and mechanical properties of marble specimens. By modifying some of the model parameters, the physical and mechanical parameters of marble samples after different high temperature grades can be effectively described. The effect of temperature damage on the dynamic failure mode of marble specimen is reflected in the fine particle size, and with the increase of treatment temperature, the fine grains of marble also increase after breaking.

关键词(KeyWords)： SHPB;HJC模型;大理岩;高温;损伤;数值模拟
SHPB;HJC model;marble;high temperature;damage;numerical simulation

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(11862010);; 云南省教育厅科学研究基金资助项目(2020Y0088)

作者(Authors): 李睿;刘磊;张志华;王远;
LI Rui;LIU Lei;ZHANG Zhi-hua;WANG Yuan;Faulty of Land and Resources Engineering, Kunming University of Science and Technology;Key Laboratory for Development and Utilization of Sino German Blue Mine and Special Underground Space in Yunnan Province;China Railway 19th Bureau Group Rail Transit Engineering Co., Ltd.;

DOI: 10.19931/j.EB.20210138

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