埋め込みFBG光ファイバセンサを用いたCFRP複合材積層板内の損傷形態推定手法の提案

Translated title of the contribution: A New Approach for Estimation of Damage Patterns in CFRP Composite Laminates Using Embedded FBG Sensors

矢代 茂樹, 武田 展雄

Research output: Contribution to journalArticle

Abstract

This paper proposes a new approach to estimate the damage pattern of a notched cross-ply laminate using an embedded Fiber Bragg Grating (FBG) sensor. The damage pattern near the notch was investigated by finite element analysis with cohesive elements for the onset and the extension of various cracks. Then, the reflection spectrum of the FBG sensor was analyzed from the strain distribution obtained in the damage analysis. Based on the above analysis, the damage pattern is optimized as an inverse problem in the damage analysis, while the spectrum shape is adopted as the objective function. In the estimation scheme, the strain distribution of the FBG sensor is calculated by the damage analysis using the damage pattern expressed by the residual strength distribution of the cohesive elements. We estimated the damage patterns of the notched cross-ply laminate from the reflection spectra obtained in the analysis and those measured in the experiment. The estimated damage patterns agreed well with those corresponding to the input spectra.
Translated title of the contributionA New Approach for Estimation of Damage Patterns in CFRP Composite Laminates Using Embedded FBG Sensors
Original languageJapanese
Pages (from-to)897-904
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume71
Issue number706
DOIs
Publication statusPublished - Jun 25 2005

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