Abstract
Recently, novel CF/benzoxazine prepregs for aircraft structures have been developed by ENEOS Corp. in Japan. Thermoplastic particles are dispersed on the surface of these prepregs. This study examines the applicability of our proposed formulations for the statistical time-dependent and temperature-dependent fatigue strength under open hole compression (OHC) for quasi-isotropic CFRP laminates using CF/benzoxazine prepreg. Results demonstrated that the statistical fatigue OHC strength of quasi-isotropic CFRP laminates with and without toughened interlayer can be formulated using the statistically determined static and fatigue OHC strengths. Furthermore, the characteristics for fatigue OHC strength of quasi-isotropic CFRP laminates with toughened interlayer were clarified compared with those of CFRP laminates without a toughened interlayer.
