CFRPの硬化過程におけるせん断変形挙動評価

抄録

Recently, integral molding technology of the carbon fiber reinforced plastics have been developed. However, the geometry of composite products is complicated, it is problem that molding defect (such as local wrinkle) occur during molding. While, shaping simulations have been developed to improve the molding accuracy by predicting the occurrence of wrinkles. In this simulation, short analysis time and high accuracy analysis are required, and the introducing of the experimental data (such as shear response) is needed. In this study, the pull-out tests of CFRP laminate were performed at room temperature and under curing conditions. The specimen observations and cure extent measurement by DSC test were performed, and the shear stress-displacement behavior were evaluated. As a result, the shear stress-displacement curves showed nonlinear behavior, and it was found that these are affected by applied pressure and tensile velocity. In the pull-out test at temperature under curing conditions, low shear stress was caused by resin softing in early on the tests, and rapid shear stress increase was caused by resin cure, that is, the shearing deformation were affected by the curing extent and resin state.