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碱式硫酸镁水泥混凝土的冲击压缩性能
Impact Compressive Properties of Basic Magnesium Sulfate Cement Concrete
投稿时间:2020-01-09  修订日期:2020-02-02
DOI:103969/j.issn.1007 9629202103016
中文关键词:  碱式硫酸镁水泥混凝土  分离式霍普金森压杆  应变率效应  动态增强因子  数值模拟
英文关键词:basic magnesium sulfate cement concrete(BMSCC)  split Hopkinson pressure bar  strain rate effect  dynamic increase factor  simulation
基金项目:国家自然科学基金资助项目(11832013,51878350,51678304,51508272)
              
作者单位
刘婷
LIU Ting
南京航空航天大学民航学院,江苏南京211106
College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
麻海燕
MA Haiyan
南京航空航天大学民航学院,江苏南京211106
College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
吴彰钰
WU Zhangyu
南京航空航天大学民航学院,江苏南京211106
College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
余红发
YU Hongfa
南京航空航天大学民航学院,江苏南京211106
College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
张锦华
ZHANG Jinhua
东南大学土木工程学院,江苏南京211189
School of Civil Engineering, Southeast University, Nanjing 211189, China
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中文摘要:
      采用75mm分离式霍普金森压杆测试了碱式硫酸镁水泥混凝土(BMSCC)的力学性能,并借助LsDyna软件和HolmquistJohnsonCook(HJC)模型,模拟了BMSCC的动态冲击力学响应.结果表明:BMSCC是典型的率相关性材料,具有明显的应变率增强效应,其冲击压缩强度随着应变率的提高而增大,动态增强因子与应变率的对数呈线性关系.通过数值模拟确定了HJC模型的21个参数,其中冲击压缩强度和峰值应变的模拟相对误差分别为-39%~09%和-100%~32%,模拟效果较好.
英文摘要:
      The mechanical properties of basic magnesium sulfate cement concrete(BMSCC) was tested using the 75mm diameter split Hopkinson pressure bar. The finite element software Ls Dyna and Holmquist Johnson Cook(HJC) model were used to simulate the mechanical response of BMSCC under impact loading. The results show that BMSCC is a typical rate dependent material with the pronounced strain rate hardening effect and its impact compressive strength increases with increasing strain rate. As a parameter characterizing the dynamic characteristics of brittle materials, dynamic increase factor is linearly related to the logarithm of strain rate. By using Ls Dyna software to simulate the impact compression process, 21 parameters of the HJC model are determined. The relative errors of impact compressive strength and peak strain are -39%09% and -100%32%, respectively. The simulation effect is quite satisfactory.
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