部分的に非接着部を有するCFRP積層複合材料の振動特性測定

抄録

CFRP is superior in specific strength, specific rigidity and lightweight compared to commonly used metallic materials. By using this material it is expected to secure safety and improve fuel economy. The use of CFRP is expected to continue expanding in the future. However, CFRP has a peculiar breaking form such as interlaminar separation, in-layer resin cracking, fiber breakage, and fiber withdrawal. The Strength of CFRP remarkably decreases due to these damage. As a further big problem, it can be said that it is very difficult to visually judge the damage itself. Currently, non-destructive inspection by ultrasonic flaw detection and X-ray CT is used, but the device itself is big and expensive. Therefore, in this study, the impulse hammering excitation test is carried out on the CFRP laminated composite material partially having non-adhering part and vibration characteristic measurement is carried out. From the result obtained by this, we verify whether it can be used as a simple non-destructive inspection.