Preprint Article Version 1 This version is not peer-reviewed

Local and Global Approaches for Damage Detection in Composite Structures by Fiber Optic Sensors

Version 1 : Received: 16 February 2018 / Approved: 16 February 2018 / Online: 16 February 2018 (16:04:42 CET)

A peer-reviewed article of this Preprint also exists.

Güemes, A.; Fernández-López, A.; F. Díaz-Maroto, P.; Lozano, A.; Sierra-Perez, J. Structural Health Monitoring in Composite Structures by Fiber-Optic Sensors. Sensors 2018, 18, 1094. Güemes, A.; Fernández-López, A.; F. Díaz-Maroto, P.; Lozano, A.; Sierra-Perez, J. Structural Health Monitoring in Composite Structures by Fiber-Optic Sensors. Sensors 2018, 18, 1094.

Journal reference: Sensors 2018, 18, 1094
DOI: 10.3390/s18041094

Abstract

Fiber optic sensors cannot measure damage; for getting information about damage from strain measurements, additional strategies are needed, and several alternatives have been proposed. This paper discuss two independent concepts: the first one is based on detecting the new strains appearing around a damage spot; the structure does not need to be under loads; the technique is very robust, damage detectability is high, but it requires sensors to be located very close to the damage, so it is a local technique. The second approach offers a wider coverage of the structure, it is based on identifying the changes caused by the damage on the strains field in the whole structure for similar external loads. Damage location does not need to be known a priori, detectability is dependent upon the sensors network density, damage size and the external loads. Examples of application to real structures are given.

Subject Areas

Structural Health Monitoring (SHM), distributed sensing, Principal Component Analysis (PCA)

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