Connecting nonlinearities: Damage precursors detection and control methodology

E. Habtour, T. Dragman, T. Masmeije, D. Di Maio, R. Haynes, A. Homborg, T. 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 nonlinearities (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 ISMA 2018 - International Conference on Noise and Vibration Engineering and USD 2018 - International Conference on Uncertainty in Structural Dynamics
EditorsD. Moens, W. Desmet, B. Pluymers, W. Rottiers
PublisherKatholieke Universiteit Leuven
Pages3723-3730
Number of pages8
ISBN (Electronic)9789073802995
Publication statusPublished - 2018
Event28th International Conference on Noise and Vibration Engineering, ISMA 2018 and 7th International Conference on Uncertainty in Structural Dynamics, USD 2018 - Leuven, Belgium
Duration: 17 Sep 201819 Sep 2018

Conference

Conference28th International Conference on Noise and Vibration Engineering, ISMA 2018 and 7th International Conference on Uncertainty in Structural Dynamics, USD 2018
CountryBelgium
CityLeuven
Period17/09/1819/09/18

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