Accurate characterization of triaxial deformation and strength properties of salt rock based on logarithmic strain. (July 2022)

• Record Type: Journal Article
• Authors: Gao, Renbo; Wu, Fei; Chen, Jie; Zhu, Chun; He, Qingchuan
• Is Part Of: Journal of energy storage. Volume 51(2022)
• Publication Date: 2022-07
• Subjects: Energy storage -- Salt rock -- Logarithmic strain -- Engineering strain -- Hou's strength model; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2022.104484
• Languages: English
• ISSNs: 2352-152X

Abstract

Abstract: Energy storage is an important strategic issue. Salt caverns have good physical properties and are suitable for energy storage, so it is necessary to study the long-term mechanical behavior of salt rock. In this paper, the conventional triaxial compression test on the salt rock was carried out. By analyzing the deformation of salt rock under triaxial stress, the deformation characteristics of rock salt under different confining pressures were summarized. The logarithmic strain is introduced into the analysis of experimental data and compared with the engineering strain. And find that using logarithmic strain to describe specimen deformation has many advantages and is more suitable for describing the deformation of rock specimens. Finally, the accuracy of Hou's model is verified based on experimental results. Highlights: Conventional triaxial tests under different confining pressures on typical salt rocks in Anning, China. Logarithmic strain is introduced into test result analysis and compared with engineering strain. Different methods were used to determine the initiation strength of rock samples under different stress levels. Validation of Hou's model by experimental results.