Applied Mechanics and Materials · 2011 · 26 citations · 2 references
Natural SciencesMaterials EngineeringMaterials ScienceMechanical Behavior Of MaterialsPolymer MaterialsStructural MaterialsGlass MaterialsHigh-temperature MaterialsMechanical CharacterizationStrength Of MaterialsStress-strain BehaviorTensile PropertiesElastic ModulusEpoxy ResinsGlass TransitionGlass Transition TemperatureHigh-temperature Mechanical PropertiesStress-strain CurveStress-strain RelationshipsUltimate Tensile Strength
Experimental results on tensile mechanics properties of GFRP bars at high temperatures are present in this paper. Thirty commercially produced GFRP tensile specimens of 8mm diameter were tested at high temperature ranging from 10°Cup to 500°C. Tensile test result indicates that, the ultimate tensile stress has significant reduction at two temperature zones, one is glass transition temperature of epoxy resin (80-120°C), with strength degradation 22%, the second is the soften temperature of glass fibers(about 400°C), the strength decrease drastically with almost linear rate and remained 33% residual strength at 500°C. The elastic modulus remained unchanged until glass transition temperature of epoxy resin, and the modulus declined linearly with the temperature elevating. Stress-strain relationships of GFRP bars exhibit liner performance even at high temperatures.
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