Abstract
Hybrid composites in which a CR980 metal plate was bonded on carbon-fiber-reinforced plastic (CFRP) were prepared. Hybrid composites were two types of CFRP/CR980 hybrid composites and CR980/CFRP hybrid composites. The properties of the hybrid composites according to surface roughness on CR980 plate and the laminating number of CFRP prepregs were analyzed. The spring-back or spring-go angles were also measured through the V-bending test of hybrid composites. In addition, a three-point bending test for the hybrid composites was conducted to measure the flexural strength. Spring-back occurred in the CFRP/CR980 hybrid composites, while spring-go was observed in the CR980/CFRP hybrid composites. Voids were not found at the bonding area of the CFRP and CR980. As the roughness at the bonding area increased, the flexural strength slightly increased. The higher the laminating number of the CFRP prepregs, the lower the deformation value. CFRP/CR980 was deformed more easily than CR980/CFRP.
Highlights
Additional components for vehicles, especially in the case eco-friendly automobiles fueled by a non-conventional power source, have led to unavoidable increases in curb weight
Carbon-fiber-reinforced plastic (CFRP), possesses a specific strength and specific stiffness that are higher than steel, in addition to being lighter than aluminum
Prepreg is a material in which matrix epoxy resin is impregnated in the carbon fiber, which is an intermediate material of carbon-fiber-reinforced plastic (CFRP) as well as a reinforcement material
Summary
Additional components for vehicles, especially in the case eco-friendly automobiles fueled by a non-conventional power source, have led to unavoidable increases in curb weight. The phenomenon of spring-back on CFRP/metal hybrid composites considering changes in thickness of CFRP prepreg has not been extensively studied. In this regard, spring-back investigations via experiments are imperative before manufacture of the hybrid-composite-based components forming complex geometry (e.g., automobile components). The effect of the laminating number of the CFRP prepreg and the interface roughness between CFRP and CR980 on the spring-back was investigated by performing a V-bending test of both types of hybrid composite. The effect of the laminating number of CFRP prepregs and interface roughness between CFRP and CR980 on flexural stress was investigated by conducting a three-point bending test of the hybrid composites
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