| 用HJC本构模型模拟混凝土SHPB实验 |
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| 引用本文： | 巫绪涛,孙善飞,李和平. 用HJC本构模型模拟混凝土SHPB实验[J]. 爆炸与冲击, 2009, 29(2): 137-142. DOI: 10.11883/1001-1455(2009)02-0137-06 |
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| 作者姓名： | 巫绪涛 孙善飞 李和平 |
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| 作者单位： | 合肥工业大学土木与水利工程学院,安徽,合肥,230009;合肥工业大学土木与水利工程学院,安徽,合肥,230009;合肥工业大学土木与水利工程学院,安徽,合肥,230009 |
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| 摘 要： | 运用Holmquist-Johnson-Cook (HJC) 本构模型对混凝土的SHPB实验进行了数值模拟。解决了罚函数算法中罚因子合理数值的选取问题。利用模拟结果按SHPB两波法重构了试样的应力应变曲线。分析了混凝土材料的SHPB实验得到应力应变曲线的有效段范围和各段的力学规律。通过比较实际混凝土材料SHPB实验和数值模拟得到的应力应变曲线，发现两者体现的力学行为很相似，即HJC模型是描述该类材料的一种合理本构模型。模拟了试样不同平行度公差下的SHPB实验，发现在一定应变率范围内其影响程度远大于试样应力(应变)不均匀性。
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| 关 键 词： | 固体力学 应力应变曲线 HJC模型 混凝土 SHPB实验 |
Numerical simulation of SHPB tests for concrete by using HJC model |
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| WU Xu-tao,SUN Shan-fei,LI He-ping. Numerical simulation of SHPB tests for concrete by using HJC model[J]. Explosion and Shock Waves, 2009, 29(2): 137-142. DOI: 10.11883/1001-1455(2009)02-0137-06 |
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| Authors: | WU Xu-tao SUN Shan-fei LI He-ping |
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| Affiliation: | 1.School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, Anhui, China |
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| Abstract: | The split Hopkinson pressure bar(SHPB) tests for concrete were numerically simulated by using the Holmquist-Johnson-Cook(HJC) constitutive model.The contact stiffness in the penalty function algorithm was reasonably determined.The stress-strain curves of the concrete specimens were reconstructed from the simulated results by applying the two-wave method used in the data processing of the SHPB tests.The effective ranges of the stress-strain curves obained in the SHPB tests and their mechanical regularity wer... |
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| Keywords: | mechanics of explosion stress-strain curve HJC model concrete SHPB test * Corresponding author: WU Xu-taoE-mail address: wuxvtao@sina.com |
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