Enhanced composites integrity through structural health monitoring

Victor Giurgiutiu, Constantinos Soutis

    Research output: Contribution to journalArticlepeer-review

    Abstract

    This paper discusses the topic of how the integrity of safety-critical structural composites can be enhanced by the use of structural health monitoring (SHM) techniques. The paper starts with a presentation of how the certification of flight-critical composite structures can be achieved within the framework of civil aviation safety authority requirements. Typical composites damage mechanisms, which make this process substantially different from that for metallic materials are discussed. The opportunities presented by the use of SHM techniques in future civil aircraft developments are explained. The paper then focuses on active SHM with piezoelectric wafer active sensors (PWAS). After reviewing the PWAS-based SHM options, the paper follows with a discussion of the specifics of guided wave propagation in composites and PWAS-tuning effects. The paper presents a number of experimental results for damage detection in simple flat unidirectional and quasi-isotropic composite specimens. Calibrated through holes of increasing diameter and impact damage of various energies and velocities are considered. The paper ends with conclusions and suggestions for further work. © Springer Science+Business Media B.V. 2012.
    Original languageEnglish
    Pages (from-to)813-829
    Number of pages16
    JournalApplied Composite Materials
    Volume19
    Issue number5
    DOIs
    Publication statusPublished - Oct 2012

    Keywords

    • Composite structures
    • Composites
    • NDE
    • Piezoelectric wafer active sensors
    • PWAS
    • SHM
    • Structural health monitoring
    • Structural integrity

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