744 細径光ファイバセンサによる CFRP 積層板の動的挙動の検出  [in Japanese] Detection of the dynamic behavior of CFRP laminates using small-diameter optical fiber sensors  [in Japanese]

In order to monitor damages in Carbon Fiber Reinforced Plastic (CFRP) laminates, it is attempted to detect transmitted waves in laminates using embedded small-diameter fiber Bragg Grating (FBG) sensors. In this research, velocities of elastic waves in CFRP unidirectional laminates and quasi-isotopic laminates were calculated theoretically. Then the relationship between the grating length and the wavelength of the elastic wave was simulated. From these results, the optimum grating length to detect elastic waves was determined.