Damage Model of Carbon-Fiber-Reinforced Concrete Based on Energy Conversion Principle
In order to enhance the practical application of carbon-fiber-reinforced concrete (CFRC) in engineering, it is necessary to study the damage mechanism of CFRC. Experimental research on the mechanical properties of CFRC under multiple strain rates was conducted. Five different fiber contents were ana...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Journal of Composites Science |
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| Online Access: | https://www.mdpi.com/2504-477X/8/2/71 |
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| author | Ruiqi Zheng Jianyong Pang Jian Sun Yongqiang Su Guoping Xu |
| author_facet | Ruiqi Zheng Jianyong Pang Jian Sun Yongqiang Su Guoping Xu |
| author_sort | Ruiqi Zheng |
| collection | DOAJ |
| description | In order to enhance the practical application of carbon-fiber-reinforced concrete (CFRC) in engineering, it is necessary to study the damage mechanism of CFRC. Experimental research on the mechanical properties of CFRC under multiple strain rates was conducted. Five different fiber contents were analyzed to study the compressive strength and tensile strength of CFRC, and the damage characteristics of CFRC under multiple strain rates were analyzed based on failure modes and energy changes. An energy-based damage constitutive model was established. The results showed the following: (1) When the carbon fiber content was 0.4%, CFRC had the best comprehensive performance, with a 15.02% increase in compressive strength and a 51.12% increase in tensile strength. With the increase in strain rate, the compressive strength of the concrete increased. (2) Under high strain rates, carbon fiber significantly enhanced the compressive strength of the concrete, and the input energy, elastic strain energy, and dissipated energy increased. The peak value of the elastic strain energy conversion rate increased, and the minimum value of the dissipated energy conversion rate decreased. (3) Under the same strain rate, the CFRC had a larger inflection point of dissipated energy corresponding to the strain compared to the reference group of concrete during the loading process. A constitutive model for CFRC was established based on damage mechanics and probability statistics. The research results will provide theoretical references for the application of carbon-fiber-reinforced concrete. |
| first_indexed | 2024-03-07T22:26:18Z |
| format | Article |
| id | doaj.art-0bfe29af04ed499b99b99d2ffde8a19d |
| institution | Directory Open Access Journal |
| issn | 2504-477X |
| language | English |
| last_indexed | 2024-03-07T22:26:18Z |
| publishDate | 2024-02-01 |
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| series | Journal of Composites Science |
| spelling | doaj.art-0bfe29af04ed499b99b99d2ffde8a19d2024-02-23T15:22:38ZengMDPI AGJournal of Composites Science2504-477X2024-02-01827110.3390/jcs8020071Damage Model of Carbon-Fiber-Reinforced Concrete Based on Energy Conversion PrincipleRuiqi Zheng0Jianyong Pang1Jian Sun2Yongqiang Su3Guoping Xu4School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, ChinaIn order to enhance the practical application of carbon-fiber-reinforced concrete (CFRC) in engineering, it is necessary to study the damage mechanism of CFRC. Experimental research on the mechanical properties of CFRC under multiple strain rates was conducted. Five different fiber contents were analyzed to study the compressive strength and tensile strength of CFRC, and the damage characteristics of CFRC under multiple strain rates were analyzed based on failure modes and energy changes. An energy-based damage constitutive model was established. The results showed the following: (1) When the carbon fiber content was 0.4%, CFRC had the best comprehensive performance, with a 15.02% increase in compressive strength and a 51.12% increase in tensile strength. With the increase in strain rate, the compressive strength of the concrete increased. (2) Under high strain rates, carbon fiber significantly enhanced the compressive strength of the concrete, and the input energy, elastic strain energy, and dissipated energy increased. The peak value of the elastic strain energy conversion rate increased, and the minimum value of the dissipated energy conversion rate decreased. (3) Under the same strain rate, the CFRC had a larger inflection point of dissipated energy corresponding to the strain compared to the reference group of concrete during the loading process. A constitutive model for CFRC was established based on damage mechanics and probability statistics. The research results will provide theoretical references for the application of carbon-fiber-reinforced concrete.https://www.mdpi.com/2504-477X/8/2/71concretecarbon fiberdamaged modelenergymechanical propertiesstrain rate |
| spellingShingle | Ruiqi Zheng Jianyong Pang Jian Sun Yongqiang Su Guoping Xu Damage Model of Carbon-Fiber-Reinforced Concrete Based on Energy Conversion Principle Journal of Composites Science concrete carbon fiber damaged model energy mechanical properties strain rate |
| title | Damage Model of Carbon-Fiber-Reinforced Concrete Based on Energy Conversion Principle |
| title_full | Damage Model of Carbon-Fiber-Reinforced Concrete Based on Energy Conversion Principle |
| title_fullStr | Damage Model of Carbon-Fiber-Reinforced Concrete Based on Energy Conversion Principle |
| title_full_unstemmed | Damage Model of Carbon-Fiber-Reinforced Concrete Based on Energy Conversion Principle |
| title_short | Damage Model of Carbon-Fiber-Reinforced Concrete Based on Energy Conversion Principle |
| title_sort | damage model of carbon fiber reinforced concrete based on energy conversion principle |
| topic | concrete carbon fiber damaged model energy mechanical properties strain rate |
| url | https://www.mdpi.com/2504-477X/8/2/71 |
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