Short time tensile behavior of unidirectional glass and carbon fiber reinforced polymer laminates with curved shapes |
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| Affiliation: | 1. Department of Civil Engineering, Sharif University of Technology, P.O. Box 11155-9313, Tehran, Iran;2. Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 11155-9161, Tehran, Iran;1. Department of Civil and Environmental Engineering, Rice University, Houston, TX 77005, USA;2. Department of Materials Science and NanoEngineering, Rice University, Houston, TX 77005, USA;3. Smalley Institute for Nanoscience and Nanotechnology, Rice University, Houston, TX 77005, USA |
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| Abstract: | A newly developed confining system for rectangular columns required a wrapping, which sustained a large amount of parasitic bending due to the curved shape of the laminates at the cross-section corners. To investigate the effect of parasitic bending on unidirectional carbon (CFRP) and glass fiber (GFRP) reinforced polymer laminates, 4 ply coupons were laminated with a semi-elastic hybrid resin and cured in a curved shape. During the tensile tests, the curved coupons stretched and failed after further loading. Due to the parasitic bending, occurring during stretching, the tensile resistance was reduced by 48% for the CFRP and by only 18% for the GFRP coupons. Tests with high-strength, high-modulus epoxy resin laminated GFRP coupons were drawn upon and compared with the semi-elastic hybrid resin laminated GFRP coupons. There is a beneficial effect on the tensile resistance with the use of semi-elastic hybrid resin. |
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