Optimisation of a cymbal transducer for its use in a high-power ultrasonic cutting device for bone surgery

Bejarano, F., Feeney, A. and Lucas, M. (2016) Optimisation of a cymbal transducer for its use in a high-power ultrasonic cutting device for bone surgery. Physics Procedia, 87, pp. 35-41. (doi: 10.1016/j.phpro.2016.12.007)

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The class V cymbal is a flextensional transducer commonly used in low-power ultrasonic applications. The resonance frequency of the transducer can be tailored by the choice of end-cap and driver materials, and the dimensions of the end-caps. The cymbal transducer has one significant limitation which restricts the operational vibration amplitude of the device. This is the limit imposed by the mechanical strength of the bonding agent between the metal end-cap and the piezoceramic driver. Therefore, when there is an increase in the input power or displacement, the stresses in the bonding layer can lead to debonding, thereby rendering the cymbal transducer ineffective for high-power ultrasonic applications. In this paper, several experimental analyses have been performed, complemented by the use of Abaqus/CAE finite element analysis, in order to develop a high-power ultrasonic cutting device for bone surgery using a new configuration of cymbal transducer, which is optimised for operation at high displacement and high input power. This new transducer uses a combination of a piezoceramic disc with a metal ring as the driver, thereby improving the mechanical coupling with the metal end-cap.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Feeney, Dr Andrew and Lucas, Professor Margaret and Bejarano, Mr Fernando
Authors: Bejarano, F., Feeney, A., and Lucas, M.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Physics Procedia
Published Online:27 December 2016
Copyright Holders:Copyright © 2016 Elsevier B.V.
First Published:First published in Physics Procedia 87: 35-41
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
490651Miniature Ultrasonic Cutting Devices for High Precision Minimal Access Orthopaedic Surgical ProceduresMargaret LucasEngineering & Physical Sciences Research Council (EPSRC)EP/G046948/1ENG - ENGINEERING SYSTEMS POWER & ENERGY