Abstract
In this work, geometrically nonlinear vibrations of fully clamped rectangular plates subjected to thermal changes are used to study the sensitivity of some vibration response parameters to the presence of damage and elevated temperature. The geometrically nonlinear version of the Mindlin plate theory is used to model the plate behaviour. Damage is represented as a thickness reduction in a small area of the plate. The plates are subjected to harmonic loading leading to large amplitude vibrations and temperature changes. The plate vibration response is obtained by a pseudo-load mode superposition method. The main results are focussed on establishing the influence of damage on the vibration response of the heated and the unheated plates and the change in the time-history diagrams and the Poincaré maps caused by damage and elevated temperature. The damage criterion formulated earlier for non-heated plates, based on analyzing the points in the Poincaré sections of the damaged and healthy plate, is modified and tested for the case of plates additionally subjected to elevated temperatures. The importance of taking into account the actual temperature in the process of damage detection is shown.
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Acknowledgments
The first author wishes to thank the Bulgarian Research Fund for the partial support through grant TN-1518/2005. The authors thank to RSE for the partial support of this work.
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Manoach, E., Trendafilova, I. (2010). Damage Detections in Nonlinear Vibrating Thermally Loaded Plates. In: Öchsner, A., da Silva, L., Altenbach, H. (eds) Materials with Complex Behaviour. Advanced Structured Materials, vol 3. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-12667-3_13
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DOI: https://doi.org/10.1007/978-3-642-12667-3_13
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