Connecting nonlinearities: Damage precursors detection and control methodology

Ed Habtour, Thiago Dragman, Thijs Masmeijer, Dario Di Maio, R. Haynes, A.M. Homborg, Tiedo Tinga

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    Abstract

    Fatigue damage precursors identification and control procedure is developed for nonlinear aero-structures and dynamic systems exposed to realistic vibratory conditions. The identification is achieved by connecting nonlinearities between macro-and micro-states, and including those connection in the equations of motion; i.e. the interplay between the local nonlinearities (or materials micro-plasticity) and the global nonlineari-ties (nonlinear dynamic parameters). Exploiting the nonlinear connections is key in linking the health of a system to its control algorithms, which can manipulate the structural dynamic responses in order to slow the progression of fatigue. This approach allows for continual re-estimation of the dynamics of the macro-states due to degradations in the properties of the micro-states at unhealthy locations by identifying precursors to damage prior to crack formation. Capturing and controlling the interplay between the local and global nonlinearities appear to hold promise in extending the service-life of high-value systems.
    Original languageEnglish
    Title of host publicationProceedings of ISMA2018 and USD2018
    EditorsWim Desmet, Bert Pluymers, David Moens, Ward Rottiers
    Place of PublicationLeuven
    PublisherKatholieke Universiteit Leuven
    Pages3597-3605
    Number of pages8
    ISBN (Print)9789073802995
    Publication statusPublished - 2018
    Event28th International Conference on Noise and Vibration Engineering, ISMA 2018 - KU Leuven, Campus of Social Sciences, Leuven, Belgium
    Duration: 17 Sep 201819 Sep 2018
    Conference number: 28
    https://www.isma-isaac.be/isma2018/

    Conference

    Conference28th International Conference on Noise and Vibration Engineering, ISMA 2018
    Abbreviated titleISMA
    CountryBelgium
    CityLeuven
    Period17/09/1819/09/18
    OtherOrganised in conjunction with the 7th edition of the International Conference on Uncertainty in Structural Dynamics - USD2018
    Internet address

    Keywords

    • Connecting nonlinearities
    • Damage precursors
    • Aerospace
    • Structural health monitoring
    • Nonlinear dynamics
    • Damage evolution
    • Adaptive systems
    • Micromechanics

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