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TECHNICAL PAPERS

Strength Analysis of Spherical Indentation of Piezoelectric Materials

[+] Author and Article Information
A. E. Giannakopoulos

Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139

J. Appl. Mech 67(2), 409-416 (Oct 13, 1999) (8 pages) doi:10.1115/1.1304913 History: Received May 21, 1999; Revised October 13, 1999
Copyright © 2000 by ASME
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Figures

Grahic Jump Location
Schematic of the normal indentation of piezoelectric materials by a rigid spherical indenter
Grahic Jump Location
Overall view of the finite element mesh used in the present calculations; details of the mesh close to and away from the contact area are included
Grahic Jump Location
Maximum tensile principal stress distribution for spherical indentation of PZT-4; (a) uncoupled case (P/(πa2)=33.84 GPa), (b) coupled case, with indenter being a perfect conductor of zero electric potential (P/(πa2)=33.84 GPa), (c) coupled case, with indenter being a perfect insulator of zero surface electric charge (P/(πa2)=33.84 GPa)
Grahic Jump Location
Maximum tensile principal stress distribution for spherical indentation of 95 percent BaTiO3–5 percentCaTiO3; (a) uncoupled case (P/(πa2)=33.84 GPa), (b) coupled case, with indenter being a perfect conductor of zero electric potential (P/(πa2)=33.84 GPa) (c) coupled case, with indenter being a perfect insulator of zero surface electric charge (P/(πa2)=33.84 GPa)
Grahic Jump Location
Magnitude of electric flux distribution, Er2+Ez2, for spherical indentation of 95 percent BaTiO3–5 percentCaTiO3 (coupled case), (a) indented with conducting sphere of zero electric potential (P/(πa2)=33.84 GPa), (b) indented with nonconducting sphere of zero surface electric charge (P/(πa2)=33.84 GPa)

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