Inverse analysis for damage identification in CFRP laminates with embedded FBG sensors

Shigeki Yashirol, Tomonaga Okabe, Nobuo Takeda

Research output: Chapter in Book/Report/Conference proceedingChapter


A method is proposed to identify the various damage state in a composite laminate using an embedded fiber Bragg grating (FBG) sensor. Numerical analysis to calculate a reflection spectrum of an FBG sensor is directly linked to a damage analysis based on layer-wise finite element method. ill this damage analysis, cohesive elements are arranged at interfaces where cracks or delarninations may occur to represent extension of these damages. Then solving the inverse problem ofthe relationship between the damage state and the reflection spectrum, we estimate the positions and the sizes of various types of damages in a composite laminate. This inverse analysis is applied to the experimental results of a tensile test for a double-edge-notched CFRP cross-ply laminate with an embedded FBG sensor. Minimizing errors between the reflection spectrum measured in the experiment and the temporarily-estimated one, it is found that the estimated damage state corresponds well with the one observed in the experiment.

Original languageEnglish
Title of host publicationComposites Technologies For 2020
PublisherWoodhead Publishing Limited
Number of pages6
ISBN (Print)9781855738317
Publication statusPublished - Jun 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)


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