| 混凝土力学行为的降阶多尺度模拟研究 |
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| 引用本文： | 王季鹏,张先锋,丁力,陈东东,陈海华,杜宁.混凝土力学行为的降阶多尺度模拟研究[J].北京理工大学学报,2017,37(S2):142-147. |
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| 作者姓名： | 王季鹏 张先锋 丁力 陈东东 陈海华 杜宁 |
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| 作者单位： | 南京理工大学 智能弹药技术国防重点学科实验室, 江苏, 南京 210094,南京理工大学 智能弹药技术国防重点学科实验室, 江苏, 南京 210094,南京理工大学 智能弹药技术国防重点学科实验室, 江苏, 南京 210094,湖南大学 汽车车身先进设计制造国家重点实验室, 湖南, 长沙 410082,南京理工大学 智能弹药技术国防重点学科实验室, 江苏, 南京 210094,南京理工大学 智能弹药技术国防重点学科实验室, 江苏, 南京 210094 |
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| 基金项目： | 国家自然科学基金资助项目（U173010）；国家部委预研基金资助项目（6140657010116BQ02001） |
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| 摘 要： | 为了研究混凝土的降阶多尺度方法动态力学特性，模拟随机形状和大小的凸多面体骨料，并考虑了骨料的随机结构和位置，建立了混凝土三维细观仿真模型，通过单轴静态压缩仿真对模型进行了验证.根据细观尺度下混凝土的实际结构，对动态SHPB冲击载荷作用下的混凝土进行仿真模拟，得到了不同入射速度下的实验数据.结果表明，仿真结果与实验结果吻合较好，多尺度方法可以将细观尺度特征和宏观尺度动态力学行为联系在一起，验证了多尺度方法的有效性，在混凝土各相力学性能方面，降阶均匀化方法相比细观尺度模型提高了计算效率.
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| 关 键 词： | 多尺度 均匀化 混凝土 分离式霍普金森压杆 细观模型 |
| 收稿时间： | 2017/9/20 0:00:00 |
Study on the Multi-Scale Simulation of the Mechanical Behavior of Concrete |
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| WANG Ji-peng,ZHANG Xian-feng,DING Li,CHEN Dong-dong,CHEN Hai-hua and DU Ning.Study on the Multi-Scale Simulation of the Mechanical Behavior of Concrete[J].Journal of Beijing Institute of Technology(Natural Science Edition),2017,37(S2):142-147. |
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| Authors: | WANG Ji-peng ZHANG Xian-feng DING Li CHEN Dong-dong CHEN Hai-hua and DU Ning |
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| Institution: | Ministerial Key Laboratory of ZNDY, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China,Ministerial Key Laboratory of ZNDY, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China,Ministerial Key Laboratory of ZNDY, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China,Automobile Body Advanced Design and Manufacturing State Key Laboratory, Hunan University, Changsha, Hunan 410082, China,Ministerial Key Laboratory of ZNDY, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China and Ministerial Key Laboratory of ZNDY, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China |
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| Abstract: | To study dynamic mechanical properties of concrete, three-dimensional mesoscopic concrete model which consists random convex polyhedron aggregate with different shape and size, and stochastic structure and location was established. The model was verified through static uniaxial compression simulation. According to the actual structure of concrete, the dynamic SHPB of concrete was simulated, and the experimental data under different impact velocities was obtained. Results show that the simulation results are in good agreement with the experimental results and the multi-scale method can be used to link the meso-scale characteristics with the dynamic mechanical behavior of macro-scale. In terms of the concrete mechanical performance, the reduced order homogenization method improves the computational efficiency compared with the meso-scale model. |
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| Keywords: | multi-scale homogenization concrete SHPB meso-scale model |
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