Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
253096 | Composite Structures | 2010 | 8 Pages |
Abstract
Internal strain measurements in cross-ply carbon-epoxy composite plates under dynamic loads are carried out using embedded FBG sensors. The principle of the FBG interrogation is based on intensity demodulation achieved via a Fabry-Pérot filter. To account for the non-linearity of the filter, the system is calibrated and the amplitude of the strain data is validated. Strains are acquired at a rate of 100 kHz with a noise level as low as 2 με and used for modal analysis and strain monitoring in low energy impact. The experimental results under impact and modal analysis compare very well with pertinent numerical models and modal analysis obtained from laser vibrometer measurements.
Related Topics
Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
Jeannot Frieden, Joël Cugnoni, John Botsis, Thomas Gmür, Dragan Ćorić,