Removing surface accretions with piezo-excited high-frequency structural waves

Michał K. Kalkowski; Timothy P. Waters; Emiliano Rustighi

doi:10.1117/12.2087048

2 April 2015 Removing surface accretions with piezo-excited high-frequency structural waves

Michał K. Kalkowski, Timothy P. Waters, Emiliano Rustighi

Proceedings Volume 9431, Active and Passive Smart Structures and Integrated Systems 2015; 94311T (2015) https://doi.org/10.1117/12.2087048
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

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.

Citation Download Citation

Michał K. Kalkowski, Timothy P. Waters, and 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); https://doi.org/10.1117/12.2087048

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