The experimental research of the damage resistance of low-energy impacted carbon fiber composite materials

This paper took carbon fiber reinforced polymer (CFRP) for example, to access to the damage size by ultrasonic C-scan detection method, and analyze the relationship between the impact energy and 4 kinds of damage parameters ,including the damage area ,the maximum damage diameter, the damage length and the damage width. The results show that: the impact damage state of the composites can be described by the damage area, and thus the damage resistance of the composite material systems can be characterized by the impact energy value near the “turning point” on the curve of impact energy- damage area.