2 April 2015 Removing surface accretions with piezo-excited high-frequency structural waves
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Unwanted accretions on structures are a common machinery maintenance problem, which can pose a serious safety threat if not treated effectively and punctually. In this paper we investigate the capability of piezo-excited structural waves for invoking delamination of accreted material from waveguides. We apply a wave-based technique for modelling piezoelectric excitation based on semi-analytical finite elements to model the interface shear stress associated with piezo-actuated structural waves. As a proof of concept, we present a demonstration experiment in which patches of material are removed from a beam-like waveguide with emulated anechoic terminations using ultrasonic excitation.
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Michał K. Kalkowski, Michał K. Kalkowski, Timothy P. Waters, Timothy P. Waters, Emiliano Rustighi, Emiliano Rustighi, "Removing surface accretions with piezo-excited high-frequency structural waves", Proc. SPIE 9431, Active and Passive Smart Structures and Integrated Systems 2015, 94311T (2 April 2015); doi: 10.1117/12.2087048; https://doi.org/10.1117/12.2087048

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