Local and global approaches for damage detection in composite structures by fiber optic sensors

Alfredo Güemes, Antonio Fernández-López, Patricia F. Díaz-Maroto, Ángel Lozano, Julián Sierra-Perez

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    Fiber optic sensors cannot measure damage directly; for getting information about damage from strain measurements, additional strategies are needed, and several alternatives have been proposed. This paper discuss two different 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 global strains field in the whole structure for similar external loads. Damage may happen anywhere in the structure, detectability is dependent upon the sensors network density, damage size and the external loads. Examples of application to real structures are given.

    Original languageEnglish
    Title of host publicationStructural Health Monitoring 2017
    Subtitle of host publicationReal-Time Material State Awareness and Data-Driven Safety Assurance - Proceedings of the 11th International Workshop on Structural Health Monitoring, IWSHM 2017
    EditorsFu-Kuo Chang, Fotis Kopsaftopoulos
    PublisherDEStech Publications
    Pages1477-1487
    Number of pages11
    ISBN (Electronic)9781605953304
    StatePublished - 2017
    Event11th International Workshop on Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance, IWSHM 2017 - Stanford, United States
    Duration: 12 Sep 201714 Sep 2017

    Publication series

    NameStructural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance - Proceedings of the 11th International Workshop on Structural Health Monitoring, IWSHM 2017
    Volume1

    Conference

    Conference11th International Workshop on Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance, IWSHM 2017
    Country/TerritoryUnited States
    CityStanford
    Period12/09/1714/09/17

    Bibliographical note

    Funding Information:
    This work was partially supported by the Spanish Ministry and competitiveness (grant number TRA2014-58263-C2-2-R)

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