2023 PHD-8 ONGOING
Release time: 2024/07/18 Publisher： original Views：
Research on fatigue-creep coupling behavior of glass-fiber reinforced resin matrix composites
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Principal Investigator: Xin Haohui Ph.D Student: Gao Qinglin |
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Project Background:
There are many bridges that have been in use for a long time and the bridge deck is one of the most frequently and critically damaged components. The severely damaged bridge deck must be replaced. Glass fiber reinforced polymer (GFRP) composite has the advantages of light weight, high strength, corrosion resistance, which can be used to replace the damaged bridge deck. However, creep significantly affects the micro-crack aggregation, interface fatigue failure and fiber fatigue fracture of GFRP material under fatigue loading, and the mechanism of fatigue-creep coupling is complex. The existing design methods have insufficient understanding of the fatigue-creep coupling mechanism of GFRP and lack of effective evaluation methods, which has become a bottleneck for the application of GFRP materials in bridge engineering.
Aims & Goals:
1. To study the influence of creep on the fatigue performance of GFRP structure under high stress level and the influence mechanism of creep on the fatigue time-dependent performance of pultruded GFRP material;
2. To establish an accurate and reliable multi-scale numerical simulation method for fatigue-creep coupling time-dependent performance of GFRP materials;
3. To predict the evolution law of stiffness and creep deformation of bridge GFRP structure under complex load.
Outcomes:
PAPER 1: 'Experimental investigation on transverse tension-tension fatigue behavior of pultruded GFRP unidirectional lamina'
Construction and Building Materials, Volume 399, 5 October 2023, 132527
DOI:https://doi.org/10.1016/j.conbuildmat.2023.132527
PAPER 3: 'Prediction of fatigue crack propagation in center cracked steel plate strengthened with partially covered CFRP strip'
PAPER 2: 'Probabilistic fatigue stiffness variation of angle-ply GFRP composites considering stress ratio effect', Engineering Structures, 2024,304:117622
PAPER 3: 'Prediction of fatigue crack propagation in center cracked steel plate strengthened with partially covered CFRP strip'
Thin-Walled Structures, 2023, 189: 110917.
CONFERENCE ORAL REPORT 1: 'Research on axial fatigue behavior of web-flange junctions of pultruded GFRP profile' in ICCS 26
CONFERENCE ORAL REPORT 1: 'Research on axial fatigue behavior of web-flange junctions of pultruded GFRP profile' in ICCS 26