202 MFCアクチュエータとFBGセンサを用いた超音波伝播による複合材料中の損傷検知(OS6-1 非破壊評価と構造モニタリング,OS6 非破壊評価と構造モニタリング)

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  • 202 Damage detection in composite materials by ultrasonic wave propagation using MFC actuator and FBG sensor

説明

For damage detection in CFRP laminates, health monitoring techniques using ultrasonic waves are effective. Currently, bulk piezo-ceramic elements are used for sending and receiving the ultrasonic waves. Hence the waves are generally narrowband. In this research, the authors developed a new damage detection system that can employ broadband ultrasonic waves in order to obtain more information in received waves. A macro fiber composite (MFC) actuator developed at NASA generates ultrasonic waves and a fiber Bragg grating (FBG) sensor receives the propagated wave. These elements do not have resonance frequency. Through the experiment for an aluminum plate and a CFRP laminate, it was confirmed that this system has the ability to propagate broadband waves.

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