Research on the Dynamic Mechanical Properties of Magnetite Concrete under Impact Load

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Xie, Ting^1 ; Chen, Zhenfu^1

School of Civil Engineering, University of South China, Hengyang

421001, China^1

关键词: Compressive strength of concrete;    Concrete specimens;    Dynamic compression;    Dynamic mechanical property;    Hopkinson pressure bar test;    Rate sensitive material;    Strain rate sensitivity;    Stress-strain relationships;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/4/042123/pdf
DOI  :  10.1088/1755-1315/267/4/042123

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to investigate the dynamic compression characteristics of magnetite concrete under impact load, the large-diameter Φ100mm Hopkinson pressure bar test device was used to test the impact compression of magnetite concrete specimens under different strain rates, whose the experimental results were valid and consistent, and the stress-strain curves of magnetite concrete were obtained at different strain rates. The results show that: (1)the stress-strain relationship of magnetite concrete materials is nonlinear; (2)that magnetite concrete materials are obvious rate sensitive materials, whose strain rate sensitivity is lower than that of plain concrete, and the compressive strength of concrete increasing with the strain rate's increasing; (3)the failure pattern of specimen appears the splitting damage at low strain rate and the block destroy at high strain rate.