Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading
Joint Authors
Wan, Zhijun
Liu, Sifei
Wang, Jing-chao
Lu, Shuai-feng
Li, Tong-huan
Source
Advances in Materials Science and Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-05-02
Country of Publication
Egypt
No. of Pages
13
Abstract EN
The fatigue damage of rock is an important factor affecting the stability of rock structure.
In this paper, the mechanical response of coal under cyclic loading was studied.
In order to accurately describe the deformation characteristics of coal under cyclic loading, an elastic-plastic model of coal based on the theory of subloading surface was established and verified by experiments.
The model can well reflect the Mancin effect and ratcheting effect of coal samples, which is basically consistent with the actual deformation characteristics of coal, and the theoretical value and experimental value are in good agreement.
At the same time, the cyclic response characteristics of specimens under strain load disturbance were analyzed.
The results show that the specific strain disturbance can only cause a certain damage to coal and the area of hysteresis loop decreases first, then stabilizes, and then increases as the number of cycles increases.
In addition, the damage factor Dn in the model was analyzed in this paper.
Dn, which can accurately describe the damage process of coal, accurately locate the time point of disturbance load change, and has greater sensitivity to coal failure, is helpful to improve the accuracy of the stability judgment of coal structure and ensure the safety of engineering.
The above results are of great significance for strengthening the understanding of coal mass instability process and mode under cyclic loading.
American Psychological Association (APA)
Liu, Sifei& Wan, Zhijun& Wang, Jing-chao& Lu, Shuai-feng& Li, Tong-huan. 2019. Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading. Advances in Materials Science and Engineering،Vol. 2019, no. 2019, pp.1-13.
https://search.emarefa.net/detail/BIM-1121479
Modern Language Association (MLA)
Liu, Sifei…[et al.]. Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading. Advances in Materials Science and Engineering No. 2019 (2019), pp.1-13.
https://search.emarefa.net/detail/BIM-1121479
American Medical Association (AMA)
Liu, Sifei& Wan, Zhijun& Wang, Jing-chao& Lu, Shuai-feng& Li, Tong-huan. Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading. Advances in Materials Science and Engineering. 2019. Vol. 2019, no. 2019, pp.1-13.
https://search.emarefa.net/detail/BIM-1121479
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1121479