Molecular dynamics study on axial mechanical properties of calcium silicate hydrate

被引：7
|
作者：
Huang, Jiangzhang [1 ]
Fan, Yue [1 ]
Ouyang, Xiaowei [2 ]
机构：
[1] Guangzhou Univ, Sch Civil Engn, Guangzhou 510006, Peoples R China
[2] Guangzhou Univ, Guangzhou Univ Tamkang Univ Joint Res Ctr Engn St, Guangzhou 510006, Peoples R China
来源：
MATERIALS RESEARCH EXPRESS | 2020年 / 7卷 / 08期
基金：
中国国家自然科学基金;
关键词：
molecular dynamics; calcium silicate hydrate; axial mechanical properties; stress-strain curves; failure mechanism; C-S-H; CRYSTAL-STRUCTURE; NANO-SCALE; SIMULATION; NANOSTRUCTURE; PRESSURE; BEHAVIOR; FRACTURE;
D O I：
10.1088/2053-1591/abaf18
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The axial mechanical properties of calcium silicate hydrate during uniaxial tension or stress have been investigated by molecular dynamic simulations. Based on the classic calcium-silicate-hydrate model, the influence of calcium to silicate ratio and temperature are studied in detail. It demonstrated that calcium silicate hydrate with different Ca/Si ratio have similar stress-strain curves under uniaxial compression, but greatly difference on the uniaxial tension behaviors. The uniaxial tensile properties was affected by temperature that the strain rate in the low-temperature is higher than that in high temperature. The work in this paper reveals the mechanical properties of calcium silicate hydrate at the nanoscale and establishes the foundation explore the failure mechanism of cement or cement-based materials.
引用
收藏
页数：9
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