超音波による繊維束への樹脂含浸モニタリングおよび超音波振動による樹脂含浸促進に関する研究

抄録

The quality of RTM products is highly dependent on the state of resin impregnation into fiber preform during the mold-filling stage, and it is required to avoid creation of molding defects such as dry spots and voids. In our previous studies, it has been reported that ultrasonic testing can be used to evaluate the state of resin impregnation in RTM. However, fiber preform is limited to glass fiber chopped strand mats. In this study, we investigated the applicability of our method to glass cloth preform. It was found that the latter stage of resin impregnation process of glass cloth can be monitored by ultrasonic testing as in the case of the mat materials. The effect of ultrasonic vibration on resin impregnation was also investigated. Although sufficient effect on resin impregnation was not confirmed within the scope of this experiment, it was possible to apply ultrasonic monitoring under ultrasonic vibration.