埋め込みFBGセンサによるCFRP積層板の応力集中部に発生する複数損傷の同定(OS1-1 光ファイバセンサ,OS1 構造ヘルスモニタリング)

概要

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This study proposes a new approach to identify the multiple damage state around a circular hole in a composite laminate using embedded Fiber Bragg Grating (FBG) sensors. FBG sensors are sensitive to a non-uniform strain distribution along their longitudinal direction, and the effects appear in the power spectrum of the reflected light from the gage section. In this study, we propose a numerical model to predict both the damage process of the laminate and the change of the reflection spectrum from the FBG sensor. Then, we represent the damage state by some design variables, and estimate the damage state solving the mathematical optimization problem about the reflection spectrum. We found that the identified damage state from the input spectrum agreed well with the damage state corresponding to the input spectrum.
社団法人日本機械学会の論文
2004-07-20