Abstract
In this study, elastic-viscoplastic properties of filament-winding carbon fiber-reinforced plastics (FW-CFRPs) are investigated using a three-scale homogenization method developed by the authors. For this, the three-scale homogenization method for FW-CFRPs is described. Then, uniaxial tensile tests of FW-CFRPs with five kinds of laminate configurations are conducted at constant displacement rates. The experimental results obtained show that the laminate configurations have significant effects on the elastic-viscoplastic properties of FW-CFRPs. Such experimental results are analyzed using the three-scale homogenization method, and both results are in excellent agreement, showing the validity of the present method. Moreover, a fiber bundle undulation model is created and analyzed using the three-scale homogenization method to investigate the effects of undulation of fiber bundles on the elastic-viscoplastic properties of FW-CFRPs. It is shown that the undulation clearly affects the elastic stiffness and flow stress of FW-CFRPs.
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