Dn. Fang et Ak. Soh, Finite element modeling of electro-mechanically coupled analysis for ferroelectric ceramic materials with defects, COMPUT METH, 190(22-23), 2001, pp. 2771-2787
Citations number
36
Categorie Soggetti
Mechanical Engineering
Journal title
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
In light of the equations of static mechanical and electrical equilibrium o
f ferroelectric materials, the functional is presented by using the princip
le of virtual work in this paper. Formulation of the electro-mechanically c
oupled finite element analysis for ferroelectric materials with defects has
been described in details. The effect of depolarization in ferroelectrics
has been taken into account in the formulation. In addition, various electr
ic boundary conditions on the crack surfaces in ferroelectric ceramics are
implemented in the finite element procedure developed. Thus, the current fi
nite element method (FEM) has been extended to account for the impermeable,
permeable and conducting cracks, by considering that the crack gap is fill
ed with homogenous dielectric media. As an example, the crack propagation o
f a double edge notched specimen of a PZT-SH ferroelectric ceramic with exa
ct electric boundary conditions on the crack surfaces is analyzed. (C) 2001
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