Multiaxial ferroelectric/ferroelastic constitutive laws governing the behavior of ceramic lead zirconate titanate (PZT) are needed for numerical calculations of stress and electric field in the vicinity of field concentrators such as cracks, inhomogeneities, and partial electrodes. Multiaxial constitutive behavior was measured using tubular specimens, both poled and unpoled. The specimens were subjected to simultaneous axial load, internal pressure, and external pressure. Deformation was measured using strain gages. The results were used to map out a “yield” (ferroelastic polarization reorientation threshold or switching) surface. The composition used, 8/65/35 PLZT, was found to obey a Tresca criterion when in the unpoled state. The switching surface was found to be a function of the polarization state. Kinematic and isotropic hardening appear to be good candidates for describing subsequent switching surfaces.
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April 2001
Technical Papers
Multiaxial Constitutive Behavior of Ferroelectric Materials
Wei Chen,
Wei Chen
The Woodruff School of Mechanical Engineering, The Georgia Institute of Technology, Atlanta, GA 30332-0405
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Christopher S. Lynch
Christopher S. Lynch
The Woodruff School of Mechanical Engineering, The Georgia Institute of Technology, Atlanta, GA 30332-0405
Search for other works by this author on:
Wei Chen
The Woodruff School of Mechanical Engineering, The Georgia Institute of Technology, Atlanta, GA 30332-0405
Christopher S. Lynch
The Woodruff School of Mechanical Engineering, The Georgia Institute of Technology, Atlanta, GA 30332-0405
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division September 14, 1999; revised manuscript received September 9, 2000. Associate Editor: E. Busso.
J. Eng. Mater. Technol. Apr 2001, 123(2): 169-175 (7 pages)
Published Online: September 9, 2000
Article history
Received:
September 14, 1999
Revised:
September 9, 2000
Citation
Chen , W., and Lynch, C. S. (September 9, 2000). "Multiaxial Constitutive Behavior of Ferroelectric Materials ." ASME. J. Eng. Mater. Technol. April 2001; 123(2): 169–175. https://doi.org/10.1115/1.1329874
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