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Experimental Investigation of Energy Evolution in Sandstone Failure during Triaxial Unloading Confining Pressure Tests
Joint Authors
Yang, Yongjie
Yang, Rui
Ma, Depeng
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-05-02
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
The deformation and failure of sandstone samples are closely related to energy changes in the material.
To explore the energy evolution during the process of sandstone sample damage, loading and unloading tests with different test paths were conducted.
The results show that more energy is stored and consumed before the stress reaches its peak, while after the peak stress, more energy is released and consumed.
Energy dissipation increases internal cracking, leads to sample damage and lithologic deterioration, and reduces the bearing capacity of the sample.
During triaxial unloading of the confining pressure, the higher the initial unloading confining pressure, the more the elastic energy stored, and the more the energy released when the sandstone sample fails, resulting in more severe damage.
Therefore, during the excavation of high-stress rock masses, large amounts of elastic energy stored in sandstone can be rapidly released, leading to rock burst disasters.
Additionally, during triaxial unloading confining pressure tests, the damage in sandstone when the sample is close to failure increases more rapidly than that during conventional triaxial compression tests because of the unloading effect of the confining pressure.
This phenomenon also illustrates that the failure of sandstone induced by unloading is more sudden than that induced by loading.
American Psychological Association (APA)
Yang, Rui& Ma, Depeng& Yang, Yongjie. 2019. Experimental Investigation of Energy Evolution in Sandstone Failure during Triaxial Unloading Confining Pressure Tests. Advances in Civil Engineering،Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1117054
Modern Language Association (MLA)
Yang, Rui…[et al.]. Experimental Investigation of Energy Evolution in Sandstone Failure during Triaxial Unloading Confining Pressure Tests. Advances in Civil Engineering No. 2019 (2019), pp.1-11.
https://search.emarefa.net/detail/BIM-1117054
American Medical Association (AMA)
Yang, Rui& Ma, Depeng& Yang, Yongjie. Experimental Investigation of Energy Evolution in Sandstone Failure during Triaxial Unloading Confining Pressure Tests. Advances in Civil Engineering. 2019. Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1117054
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1117054