Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading
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...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/9841297 |
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| author | Si-fei Liu Zhi-jun Wan Jing-chao Wang Shuai-feng Lu Tong-huan Li |
| author_facet | Si-fei Liu Zhi-jun Wan Jing-chao Wang Shuai-feng Lu Tong-huan Li |
| author_sort | Si-fei Liu |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-8084f599f27249d99ab792db5da36171 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-8084f599f27249d99ab792db5da361712025-02-03T01:09:54ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422019-01-01201910.1155/2019/98412979841297Subloading Surface Model and Experimental Study of Coal Failure under Cyclic LoadingSi-fei Liu0Zhi-jun Wan1Jing-chao Wang2Shuai-feng Lu3Tong-huan Li4Key Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining & Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining & Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining & Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining & Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining & Technology, Xuzhou 221116, ChinaThe 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.http://dx.doi.org/10.1155/2019/9841297 |
| spellingShingle | Si-fei Liu Zhi-jun Wan Jing-chao Wang Shuai-feng Lu Tong-huan Li Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading Advances in Materials Science and Engineering |
| title | Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading |
| title_full | Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading |
| title_fullStr | Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading |
| title_full_unstemmed | Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading |
| title_short | Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading |
| title_sort | subloading surface model and experimental study of coal failure under cyclic loading |
| url | http://dx.doi.org/10.1155/2019/9841297 |
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