Type I Fracture Toughness Test of Rock-like Materials Based on the Particle Flow Method
In order to investigate the feasibility and reliability of the three-dimensional particle flow method in simulating the type I fracture toughness test, four types of numerical samples were established by particle flow code PFC3D: straight crack three-point bending (SC3PB), edge cracked flattened sem...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8812205 |
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| author | Ling Yue Bangyong Yu Chengxi Zhao Fei Guo Fei Huang |
| author_facet | Ling Yue Bangyong Yu Chengxi Zhao Fei Guo Fei Huang |
| author_sort | Ling Yue |
| collection | DOAJ |
| description | In order to investigate the feasibility and reliability of the three-dimensional particle flow method in simulating the type I fracture toughness test, four types of numerical samples were established by particle flow code PFC3D: straight crack three-point bending (SC3PB), edge cracked flattened semicircular disc (ECFSD), cracked chevron notched Brazilian disc (CCNBD), and edge cracked flattened ring (ECFR). Three models with different strength parameters (group A, group B, and group C) were established for each type, in which group A parameters are obtained from the concrete model, group B parameters are applied for simulating marble, and group C parameters are for granite. The type I fracture toughness and the failure form of each model are obtained by conducting the numerical test, and the curves of load versus displacement of loading point are recorded. The numerical test results show that, with the same strength parameter, the maximum difference in test results of each specimen type is 0.39 MPa·m1/2. The KIC of ECFR specimen is 0.13–0.28 MPa·m1/2 smaller than that of CCNBD specimen, and the KIC of ECFSD specimen is slightly higher than that of CCNBD sample. The KIC of SC3PB specimen is 0.06–0.21 MPa·m1/2 smaller than that of the CCNBD sample. When the loading rate is less than 0.01 m/s, the effect of loading rate on fracture toughness can be reduced to less than 0.1 MPa·m1/2. |
| format | Article |
| id | doaj-art-bc97fb6d8b7e460697f0ff8c971ec19a |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
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| series | Advances in Civil Engineering |
| spelling | doaj-art-bc97fb6d8b7e460697f0ff8c971ec19a2025-02-03T01:24:57ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88122058812205Type I Fracture Toughness Test of Rock-like Materials Based on the Particle Flow MethodLing Yue0Bangyong Yu1Chengxi Zhao2Fei Guo3Fei Huang4Institute of Construction Engineering, Changzhou Vocational Institute of Engineering, Changzhou 213164, Jiangsu, ChinaInstitute of Construction Engineering, Changzhou Vocational Institute of Engineering, Changzhou 213164, Jiangsu, ChinaInstitute of Construction Engineering, Changzhou Vocational Institute of Engineering, Changzhou 213164, Jiangsu, ChinaMinistry of Education Key Laboratory of Geological Disaster of Three Gorges Reservoir Area, China Three Gorges University, Yichang 443002, Hubei, ChinaChina Design Group Co., Ltd., Nanjing 210014, Jiangsu, ChinaIn order to investigate the feasibility and reliability of the three-dimensional particle flow method in simulating the type I fracture toughness test, four types of numerical samples were established by particle flow code PFC3D: straight crack three-point bending (SC3PB), edge cracked flattened semicircular disc (ECFSD), cracked chevron notched Brazilian disc (CCNBD), and edge cracked flattened ring (ECFR). Three models with different strength parameters (group A, group B, and group C) were established for each type, in which group A parameters are obtained from the concrete model, group B parameters are applied for simulating marble, and group C parameters are for granite. The type I fracture toughness and the failure form of each model are obtained by conducting the numerical test, and the curves of load versus displacement of loading point are recorded. The numerical test results show that, with the same strength parameter, the maximum difference in test results of each specimen type is 0.39 MPa·m1/2. The KIC of ECFR specimen is 0.13–0.28 MPa·m1/2 smaller than that of CCNBD specimen, and the KIC of ECFSD specimen is slightly higher than that of CCNBD sample. The KIC of SC3PB specimen is 0.06–0.21 MPa·m1/2 smaller than that of the CCNBD sample. When the loading rate is less than 0.01 m/s, the effect of loading rate on fracture toughness can be reduced to less than 0.1 MPa·m1/2.http://dx.doi.org/10.1155/2020/8812205 |
| spellingShingle | Ling Yue Bangyong Yu Chengxi Zhao Fei Guo Fei Huang Type I Fracture Toughness Test of Rock-like Materials Based on the Particle Flow Method Advances in Civil Engineering |
| title | Type I Fracture Toughness Test of Rock-like Materials Based on the Particle Flow Method |
| title_full | Type I Fracture Toughness Test of Rock-like Materials Based on the Particle Flow Method |
| title_fullStr | Type I Fracture Toughness Test of Rock-like Materials Based on the Particle Flow Method |
| title_full_unstemmed | Type I Fracture Toughness Test of Rock-like Materials Based on the Particle Flow Method |
| title_short | Type I Fracture Toughness Test of Rock-like Materials Based on the Particle Flow Method |
| title_sort | type i fracture toughness test of rock like materials based on the particle flow method |
| url | http://dx.doi.org/10.1155/2020/8812205 |
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