The failure mechanism of carbon fiber-reinforced composites under longitudinal compression considering the interface
In this paper, a longitudinal compression experiment of composites was conducted and the macroscopic failure mode was obtained. Also, the microscopic failure morphologies of longitudinal compression and kink band were observed by using scanning electron microscopy. It can be seen that, under compres...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2017-05-01
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| Series: | Science and Engineering of Composite Materials |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/secm-2015-0057 |
| _version_ | 1819148798274830336 |
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| author | Han Geng Guan Zhidong Li Xing Ji Ruipeng Du Shanyi |
| author_facet | Han Geng Guan Zhidong Li Xing Ji Ruipeng Du Shanyi |
| author_sort | Han Geng |
| collection | DOAJ |
| description | In this paper, a longitudinal compression experiment of composites was conducted and the macroscopic failure mode was obtained. Also, the microscopic failure morphologies of longitudinal compression and kink band were observed by using scanning electron microscopy. It can be seen that, under compression, fibers bend and form a kink band, which is the most typical failure mode. Then a micromechanical model of fiber random distribution based on the random collision algorithm, which can reveal the progressive failure mechanism of longitudinal compression considering the kink-band deformation, was established, with two dominant damage mechanisms – plastic deformation and ductile damage initiation of the polymer matrix and interfacial debonding included in the simulation by the extended Drucker-Prager model and cohesive zone model, respectively. Through numerical simulation, the loading and failure procedures were divided into three stages: elastic domain, softening domain and fiber failure domain. It can be concluded that the kink band was a result of fiber instability (micro-bulking), which is caused by the elastic bending of fibers. The fibers rotate and break into two places, forming a kink band. Then the fibers rotate further until the matrix between the fibers fails and the kink-band breaks and, hence, the composite loses its load-bearing capability. |
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| format | Article |
| id | doaj.art-0c02d6a49421425ab0dbf5689ab13fd8 |
| institution | Directory Open Access Journal |
| issn | 0792-1233 2191-0359 |
| language | English |
| last_indexed | 2024-12-22T13:51:26Z |
| publishDate | 2017-05-01 |
| publisher | De Gruyter |
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| series | Science and Engineering of Composite Materials |
| spelling | doaj.art-0c02d6a49421425ab0dbf5689ab13fd82022-12-21T18:23:39ZengDe GruyterScience and Engineering of Composite Materials0792-12332191-03592017-05-0124342943710.1515/secm-2015-0057The failure mechanism of carbon fiber-reinforced composites under longitudinal compression considering the interfaceHan Geng0Guan Zhidong1Li Xing2Ji Ruipeng3Du Shanyi4School of Aeronautic Science and Engineering, Beihang University, Beijing, 100191, ChinaSchool of Aeronautic Science and Engineering, Beihang University, Beijing, 100191, ChinaComposite Materials and Structures Group, Beijing Aeronautical Science and Technology Research Institute (BASTRI), Beijing, ChinaSchool of Aeronautic Science and Engineering, Beihang University, Beijing, 100191, ChinaSchool of Aeronautic Science and Engineering, Beihang University, Beijing, 100191, ChinaIn this paper, a longitudinal compression experiment of composites was conducted and the macroscopic failure mode was obtained. Also, the microscopic failure morphologies of longitudinal compression and kink band were observed by using scanning electron microscopy. It can be seen that, under compression, fibers bend and form a kink band, which is the most typical failure mode. Then a micromechanical model of fiber random distribution based on the random collision algorithm, which can reveal the progressive failure mechanism of longitudinal compression considering the kink-band deformation, was established, with two dominant damage mechanisms – plastic deformation and ductile damage initiation of the polymer matrix and interfacial debonding included in the simulation by the extended Drucker-Prager model and cohesive zone model, respectively. Through numerical simulation, the loading and failure procedures were divided into three stages: elastic domain, softening domain and fiber failure domain. It can be concluded that the kink band was a result of fiber instability (micro-bulking), which is caused by the elastic bending of fibers. The fibers rotate and break into two places, forming a kink band. Then the fibers rotate further until the matrix between the fibers fails and the kink-band breaks and, hence, the composite loses its load-bearing capability.https://doi.org/10.1515/secm-2015-0057feminterfacekink bandlongitudinal compressionunidirectional composite |
| spellingShingle | Han Geng Guan Zhidong Li Xing Ji Ruipeng Du Shanyi The failure mechanism of carbon fiber-reinforced composites under longitudinal compression considering the interface Science and Engineering of Composite Materials fem interface kink band longitudinal compression unidirectional composite |
| title | The failure mechanism of carbon fiber-reinforced composites under longitudinal compression considering the interface |
| title_full | The failure mechanism of carbon fiber-reinforced composites under longitudinal compression considering the interface |
| title_fullStr | The failure mechanism of carbon fiber-reinforced composites under longitudinal compression considering the interface |
| title_full_unstemmed | The failure mechanism of carbon fiber-reinforced composites under longitudinal compression considering the interface |
| title_short | The failure mechanism of carbon fiber-reinforced composites under longitudinal compression considering the interface |
| title_sort | failure mechanism of carbon fiber reinforced composites under longitudinal compression considering the interface |
| topic | fem interface kink band longitudinal compression unidirectional composite |
| url | https://doi.org/10.1515/secm-2015-0057 |
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