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Experimental investigation on the moment-rotation performance of pultruded FRP web-flange junctions
- Source :
- Composites Part B: Engineering. 222:109087
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- This paper aims to present an experimental investigation on the behavior of web-flange junctions (WFJs) rotational stiffness of pultruded fiber-reinforced polymer composites (FRP). Channels and I-sections were tested using a simple set-up, which was developed in order to experimentally characterize the junctions in a direct manner. The Digital Image Correlation (DIC) technique was used, allowing overall deflections and relative rotations between web and flange to be monitored. The WFJs' imperfections were analyzed through an optical microscope and correlated with the cracks' formation. Further, damage thresholds are identified using available stress equations for curved composite members and lower bound functions are proposed to simulate the junction stiffness retention. Finally, two Equations are developed in order to analytically predict pultruded junctions' rotational stiffness per unit of width. In general, the theoretical and experimental results agreed fairly well, with a maximum difference of 24% for I-sections and 38% for channels.
- Subjects :
- analytical modelling
mechanical-behavior
Digital image correlation
Materials science
Glass fiber
02 engineering and technology
Flange
010402 general chemistry
Rotation
01 natural sciences
Industrial and Manufacturing Engineering
members
Stress (mechanics)
stiffness
medicine
Composite material
defects
Mechanical Engineering
Stiffness
pultrusion
Fibre-reinforced plastic
021001 nanoscience & nanotechnology
failure
0104 chemical sciences
Mechanics of Materials
Pultrusion
Ceramics and Composites
medicine.symptom
strength
0210 nano-technology
glass fibers
Subjects
Details
- ISSN :
- 13598368
- Volume :
- 222
- Database :
- OpenAIRE
- Journal :
- Composites Part B: Engineering
- Accession number :
- edsair.doi.dedup.....e2801119e186e2e4bebf1e8155565196