Experimental Research on Energy Evolution of Sandstone with Different Moisture Content under Uniaxial Compression

被引:2
作者
Liu, Yonghong [1 ]
Zhao, Fujun [1 ]
Wu, Qiuhong [1 ]
Fan, Baojie [1 ]
Tang, Zhenqi [2 ]
机构
[1] Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Peoples R China
[2] Construct Fifth Engn Bur Co, Changsha 414000, Peoples R China
基金
中国国家自然科学基金;
关键词
energy evolution; moisture contents; uniaxial compression; failure process; BEHAVIOR; ROCK;
D O I
10.3390/su16114636
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In order to investigate the impact of moisture content on energy evolution, three types of rock samples with varying moisture contents were subjected to uniaxial compression tests. The study aimed to analyze the reasons behind the differences in energy during the deformation process of rocks with different moisture contents. The findings indicate that with increasing moisture content, the peak strength and elastic modulus of the samples decrease. However, the ratio of crack initiation strength sigma ci to peak strength sigma f shows little effect, primarily because the characteristic strength ratio sigma ci/sigma f is determined by external loads. The growth rate of elastic energy reaches its maximum value in the early stage of yield, while the proportion of elastic energy reaches its peak value in the later stage of yield. In the deformation and failure process of rocks with varying moisture contents, the increment in elastic performance is smallest in the initial compaction stage for saturated rocks, whereas it is the largest in the yield stage for dry rocks. Additionally, a damage evolution equation based on energy dissipation was established and validated.
引用
收藏
页数:12
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