1307 応答曲面法を利用した FBG センサ埋め込み CFRP 積層板の損傷評価

概要

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The multiple damage state of a notched laminate was estimated with an embedded fiber Bragg grating (FBG) sensor. Reflection spectrum of the FBG sensor in a damaged laminate was numerically calculated by coupled-mode theory and damage extension analysis based on finite element method with cohesive elements. Then a database of strain distributions and reflection spectra at various damage states was obtained from the analytical results. The relationship between the damage state and the reflection spectra of the FBG sensor was expressed mathematically by response surface methodology. Then, solving the inverse problem of the relationship between damage state and reflection spectrum, we estimate typical damage state of a double-edge-notched cross-ply laminate. The estimated damage state is found to correspond well with the one obtained in the experiment.
社団法人日本機械学会の論文
2003-09-23