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

Yonghong Liu, Fujun Zhao (), Qiuhong Wu, Baojie Fan and Zhenqi Tang
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Yonghong Liu: School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Fujun Zhao: School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Qiuhong Wu: School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Baojie Fan: School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Zhenqi Tang: Construction Fifth Engineering Bureau Co., Changsha 414000, China

Sustainability, 2024, vol. 16, issue 11, 1-12

Abstract: 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 σ ci to peak strength σ f shows little effect, primarily because the characteristic strength ratio σ ci /σ 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.

Keywords: energy evolution; moisture contents; uniaxial compression; failure process (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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