This paper considers a piezoelectric ceramic layer with a surface electrode. It focuses on the effect of the layer thickness on the electrode tip fields. A closed-form solution for the electromechanical fields at the electrode tip is obtained and is expressed in terms of the applied electric field intensity factor, which can be obtained exactly for infinite layer thickness and numerically for finite layer thickness. The stress, electric displacement, and electric field are plotted to show the effect of layer thickness. It is found that the stresses and field intensities at the electrode tip can be reduced considerably by decreasing the thickness of the piezoelectric layer, confirming the previous finding. The paper also gives a solution for two identical and collinear surface electrodes. The relative distance between the electrodes is observed to have significant influence on the electromechanical field in the piezoelectric layer.
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March 2008
Research Papers
Modeling Surface Electrodes on a Piezoelectric Layer
B.-L. Wang,
B.-L. Wang
Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering, Mechanical Engineering Building J07,
The University of Sydney
, Sydney, New South Wales 2006, Australia
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Y.-W. Mai
Y.-W. Mai
Fellow ASME
Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering, Mechanical Engineering Building J07,
The University of Sydney
, Sydney, New South Wales 2006, Australia
Search for other works by this author on:
B.-L. Wang
Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering, Mechanical Engineering Building J07,
The University of Sydney
, Sydney, New South Wales 2006, Australia
Y.-W. Mai
Fellow ASME
Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering, Mechanical Engineering Building J07,
The University of Sydney
, Sydney, New South Wales 2006, AustraliaJ. Appl. Mech. Mar 2008, 75(2): 021007 (8 pages)
Published Online: February 20, 2008
Article history
Received:
March 12, 2007
Revised:
June 11, 2007
Published:
February 20, 2008
Citation
Wang, B., and Mai, Y. (February 20, 2008). "Modeling Surface Electrodes on a Piezoelectric Layer." ASME. J. Appl. Mech. March 2008; 75(2): 021007. https://doi.org/10.1115/1.2775504
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