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.
Removing surface accretions with piezo-excited high-frequency structural waves / Kalkowski, M. K.; Waters, T. P.; Rustighi, E.. - 9431:(2015), pp. 94311T.1-94311T.15. (Intervento presentato al convegno Active and Passive Smart Structures and Integrated Systems 2015 tenutosi a San Diego, CA nel 9th-10th March 2015) [10.1117/12.2087048].
Removing surface accretions with piezo-excited high-frequency structural waves
Rustighi E.
2015-01-01
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
