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http://dx.doi.org/10.12652/Ksce.2013.33.3.833

An Investigation on the Nonlinear Shear Behavior of FRP Composites Considering Temperature Variation and Fabricating Parameters  

Jung, Woo-Young (Department of Civil Engineering, Gangneung-Wonju National University)
Hwang, Jin-Seop (Department of Civil Engineering, Gangneung-Wonju National University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.33, no.3, 2013 , pp. 833-841 More about this Journal
Abstract
In the case of composite material, a variety of characteristics were expressed depending on the materials that were composed of. In this study, the materials showing non-linear shear behavior were investigated among FRP composite. Each specimen was designed and analyzed according to ASTM D4255 method: regulations on the 2-rail. The dependent variables included in this experiment were a variety of fiber, fiber volume ratio, fiber array direction, temperature, material homogeneity. For determination of characteristics based on the fiber array, fiber array direction of 0, 30, 45, and 60 degrees were selected for test specimen. Temperature of 25, 40, 60, and $80^{\circ}C$ were considered for investigation of FRP materials'shear behavior based on the external temperature. Nonlinear shear behavior was observed throughout the FRP composite material in this study. Also, using vinyl ester resins, high fiber volume ratio, and fiber array direction of 45 degree appeared to show the most prominent nonlinear shear behavior. As for the findings related to the temperature change, non-linear behavior was decreased as the external temperature increased. For factory manufactured product, non-linear behavior was relatively at parity in comparison to the behavior found in the hand lay-up FRP composite specimen.
Keywords
FRP; Shear; Nonlinearity; Material Test; Resin Matrix;
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