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Indentation response of piezoelectric films under frictional contact.pdf

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Indentation response of piezoelectric films under frictional contact.pdf

International Journal of Engineering Science 107 (2016) 36–53 Contents lists available at ScienceDirect International Journal of Engineering Science journal homepage: /locate/ijengsci Indentation response of piezoelectric ?lms under frictional contact Luis Rodríguez-Tembleque a,?, Andrés Sáez a, M.H. Aliabadi b a Escuela Técnica Superior de Ingeniería, Universidad de Sevilla, Camino de los Descubrimientos s/n , Sevilla E-41092, Spain b Department of Aeronautics, Faculty of Engineering, Imperial College of London, South Kensington Campus, London SW7 2AZ, UK article info Article history: Received 27 June 2016 Accepted 13 July 2016 Available online 25 July 2016 Keywords: Piezoelectric ?lms Frictional contact Conducting indenter Electro-elastic materials Boundary element analysis abstract Piezoelectric materials are available in a variety of shapes and forms in smart systems. One of the most common shapes for sensor or actuator applications is the ?lm form. To gain a better understanding of the indentation behavior of these systems, this work analyzes piezoelectric ?lms under different 3D frictional contact boundary conditions. For this purpose, the boundary element formulation presented by authors in Rodríguez-Tembleque, Buroni, and Sáez (2015) is used for modeling piezoelectric ?nitely thick and thin ?lms under orthotropic frictional indentation conditions, including tangential loads. The formulation has been applied to analyze the in?uence of friction and tangential loads on the electromechanical response of ?nitely thick piezoelectric ?lms, ranging from a piezoelectric half space con?guration, where the contact radius is much smaller than the thickness of the ?lm, to a thin ?lm con?guration. Results reveal that these variables have to be considered to study the indentation response of these advanced systems. In other case, we could over- or underestimate the piezoelectric response and its distribution over the contact zone. ? 2016 Elsevier Ltd. All rights reserved.