Abstract
Objective
The damage tolerance performance of CFRP laminates for marine use was evaluated based on the clarification of impact damage and its propagation behavior. The damages within CFRP laminates were clarified with nondestructive methods and the direct observation of cross-section three-dimensionally.
Approach
The impact damage and its propagation behavior under fatigue loading and water environment of T300-3K plain woven and T700S-12K multi-axial knitted CFRP laminates were discussed. Matrix resin was vinylester, and the molding method was vacuum assisted resin transfer molding (VARTM). The damage mechanism within candidate CFRP laminates was evaluated based on the precise observation. Ultrasonic scanning was conducted as a non-destructive observation method, and the cross-sectional observation was also conducted at multiple sections of laminate. The difference between impact damage morphology of plain woven and multi-axial stitched CFRP laminates was characterized three-dimensionally.
Achievements
The damage tolerance performance of CFRP laminates for marine use was evaluated. For this purpose, the impact damage mechanism and its propagation behavior of T300 plain woven and T700 multi-axial knitted CFRP laminates were observed by non-destructive and destructive observation methods. Each image observed by these approaches was integrated and ‘three-dimensional’ damage distribution images were obtained. In addition, environmental effects on mechanical properties of damaged CFRP laminate were evaluated.
