Energy evolution characteristics and failure mechanism of coal confined by CFRP jackets subjected to different loading rates
To reveal the improvement effects of Carbon fiber reinforced polymer (CFRP) jackets on the strength and deformation characteristics of coal samples, and the energy transformation mechanism during the failure process of coal samples under different loading rates. In this study, uniaxial compression t...
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| Language: | English |
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Elsevier
2025-02-01
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| Series: | Polymer Testing |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142941825000376 |
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| author | Qingwen Li Mengjiao Xu Wenxia Li Chuangchuang Pan Mengmeng Yu |
| author_facet | Qingwen Li Mengjiao Xu Wenxia Li Chuangchuang Pan Mengmeng Yu |
| author_sort | Qingwen Li |
| collection | DOAJ |
| description | To reveal the improvement effects of Carbon fiber reinforced polymer (CFRP) jackets on the strength and deformation characteristics of coal samples, and the energy transformation mechanism during the failure process of coal samples under different loading rates. In this study, uniaxial compression tests were conduct on 28 coal samples, the results indicated that both the loading rate and the number of CFRP layers significantly influenced the energy evolution process of the coal samples. The total energy growth ratio of coal samples confined by single and double layer of CFRP jackets ranging from 11.86 to 23.46 and 32.002–56.066, respectively, with the total energy at failure of the double layer samples being 1.8 times that of the single layer ones. The number of CFRP layers significantly enhances the total energy at the peak point and its growth ratio of the coal samples. At the minimum (maximum) loading rate, the growth ratio of the dissipation energy rate at the peak point decreases with the increase of CFRP layers. Additionally, the value at the maximum rate is approximately 6.03–8.87 times greater than that at the minimum rate. The elastic energy consumption ratio exhibited a ‘fishhook-shaped’ trend as axial deformation increased. The use of CFRP jackets can effectively improve the energy storage mechanism of coal samples. Therefore, studying the energy dissipation and failure behavior of CFRP confined coal samples subjected to different loading rates is crucial for reducing the risk of accidents caused by coal pillar instability. |
| format | Article |
| id | doaj-art-98e70f9d2f6a489a8eed4c26ca314afb |
| institution | Kabale University |
| issn | 1873-2348 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Polymer Testing |
| spelling | doaj-art-98e70f9d2f6a489a8eed4c26ca314afb2025-02-09T04:59:36ZengElsevierPolymer Testing1873-23482025-02-01143108723Energy evolution characteristics and failure mechanism of coal confined by CFRP jackets subjected to different loading ratesQingwen Li0Mengjiao Xu1Wenxia Li2Chuangchuang Pan3Mengmeng Yu4School of Civil and Architectural Engineering, Liaoning University of Technology, Jinzhou, 121001, China; China Building Materials Industry Geologic Exploration Center Liaoning Branch, Shenyang, 110004, China; Corresponding author.School of Civil and Architectural Engineering, Liaoning University of Technology, Jinzhou, 121001, ChinaSchool of Civil and Architectural Engineering, Liaoning University of Technology, Jinzhou, 121001, ChinaSchool of Civil and Architectural Engineering, Liaoning University of Technology, Jinzhou, 121001, ChinaSchool of Civil and Architectural Engineering, Liaoning University of Technology, Jinzhou, 121001, China; College of Water Resources and Hydropower Engineering, North China Electric Power University, Beijing, 102206, ChinaTo reveal the improvement effects of Carbon fiber reinforced polymer (CFRP) jackets on the strength and deformation characteristics of coal samples, and the energy transformation mechanism during the failure process of coal samples under different loading rates. In this study, uniaxial compression tests were conduct on 28 coal samples, the results indicated that both the loading rate and the number of CFRP layers significantly influenced the energy evolution process of the coal samples. The total energy growth ratio of coal samples confined by single and double layer of CFRP jackets ranging from 11.86 to 23.46 and 32.002–56.066, respectively, with the total energy at failure of the double layer samples being 1.8 times that of the single layer ones. The number of CFRP layers significantly enhances the total energy at the peak point and its growth ratio of the coal samples. At the minimum (maximum) loading rate, the growth ratio of the dissipation energy rate at the peak point decreases with the increase of CFRP layers. Additionally, the value at the maximum rate is approximately 6.03–8.87 times greater than that at the minimum rate. The elastic energy consumption ratio exhibited a ‘fishhook-shaped’ trend as axial deformation increased. The use of CFRP jackets can effectively improve the energy storage mechanism of coal samples. Therefore, studying the energy dissipation and failure behavior of CFRP confined coal samples subjected to different loading rates is crucial for reducing the risk of accidents caused by coal pillar instability.http://www.sciencedirect.com/science/article/pii/S0142941825000376Loading rateCoalCFRP layerUniaxial compression testEnergy dissipation |
| spellingShingle | Qingwen Li Mengjiao Xu Wenxia Li Chuangchuang Pan Mengmeng Yu Energy evolution characteristics and failure mechanism of coal confined by CFRP jackets subjected to different loading rates Polymer Testing Loading rate Coal CFRP layer Uniaxial compression test Energy dissipation |
| title | Energy evolution characteristics and failure mechanism of coal confined by CFRP jackets subjected to different loading rates |
| title_full | Energy evolution characteristics and failure mechanism of coal confined by CFRP jackets subjected to different loading rates |
| title_fullStr | Energy evolution characteristics and failure mechanism of coal confined by CFRP jackets subjected to different loading rates |
| title_full_unstemmed | Energy evolution characteristics and failure mechanism of coal confined by CFRP jackets subjected to different loading rates |
| title_short | Energy evolution characteristics and failure mechanism of coal confined by CFRP jackets subjected to different loading rates |
| title_sort | energy evolution characteristics and failure mechanism of coal confined by cfrp jackets subjected to different loading rates |
| topic | Loading rate Coal CFRP layer Uniaxial compression test Energy dissipation |
| url | http://www.sciencedirect.com/science/article/pii/S0142941825000376 |
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