Journal article
Fracture characterization of Carbon fiber-reinforced polymer-concrete bonded interfaces under four-point bending
Engineering fracture mechanics, Vol.78(6), pp.1247-1263
2011
Handle:
https://hdl.handle.net/2376/115200
Abstract
A combined analytical and experimental approach is presented to characterize both mode-II and mixed mode fracture of Carbon fiber-reinforced polymer-concrete bonded interfaces under four-point bending load, and closed-form solutions of compliance and energy release rate of the mode-II (four-point symmetric end-notched flexure) and mixed (four-point asymmetric end-notched flexure) mode fracture specimens are provided. The transverse shear deformation in each sub-layer of bi-material bonded beams is included by modeling each sub-layer as an individual first order shear deformable beam, and the effect of interface crack tip deformation on the compliance and energy release rate are taken into account by applying the interface deformable bi-layer beam theory (i.e., the flexible joint model). The improved accuracy of the present analytical solutions for both the compliance and energy release rate is illustrated by comparing with the solutions predicted by the conventional rigid joint model and finite element analysis. The fracture of Carbon fiber-reinforced polymer-concrete bonded interface is experimentally evaluated using both the four-point symmetric and asymmetric end-notched flexure specimens, and the corresponding values of critical energy release rates are obtained. Comparisons of the compliance rate-changes and resulting critical energy release rates based on the rigid joint model, the present theoretical model, and numerical finite element analysis demonstrate that the crack tip deformation plays an important role in accurately characterizing the mixed mode fracture toughness of hybrid material bonded interfaces under four-point bending load. The improved solution of energy release rates for the four-point symmetric and asymmetric end-notched flexure specimens by the flexible joint model can be used to effectively characterize hybrid material interface, and the fracture toughness values obtained for the Carbon fiber-reinforced polymer-concrete interface under mode-II and mixed mode loading can be employed to predict the interface fracture load of concrete structures strengthened with composites.
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Details
- Title
- Fracture characterization of Carbon fiber-reinforced polymer-concrete bonded interfaces under four-point bending
- Creators
- Pizhong Qiao - State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering and College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, PR ChinaLei Zhang - State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering and College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, PR ChinaFangliang Chen - State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering and College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, PR ChinaYing Chen - Department of Civil Engineering, Shandong University, Jinan 250061, PR ChinaLuyang Shan - College of Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, PR China
- Publication Details
- Engineering fracture mechanics, Vol.78(6), pp.1247-1263
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900547548701842
- Language
- English
- Resource Type
- Journal article