Seminar Series - 2001-2002

Piezoelectricity With Initial Fields.  Antiplane Problems.

Fenghong Liu, M.S. Thesis Defense
Department of Engineering Mechanics
University of Nebraska - Lincoln
Advisor:  Dr. Eveline Baesu

Date: Monday, July 15, 2002
Time: 8:00 a.m.
Place: W128 Nebraska Hall


Piezoelectric material is characterized by its ability to inter-convert electrical and mechanical energies. These properties make them suitable for structures requiring accurate monitoring and control. They have been used as sensors, actuators and transducers in a wide variety of applications. Experiments have shown that the pre-existing stress and electric field greatly influence certain aspects of the behavior of the piezoelectric materials.

The objective of this study is to analyze the effects of pre-existing stress and electric field on stress concentrations in piezoelectric materials from the class 222, under antiplane state deformation. The basic theoretical framework to analyze the behavior of single crystal piezoelectric materials in the presence of pre-existing stresses and electric fields is presented. The biasing fields are assumed to be static. Stability considerations for piezoelectric single crystals under biasing fields is presented. General solutions in terms of complex potentials are derived for the antiplane problem.
 
 
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