Jc. Debus et al., FINITE-ELEMENT MODELING OF LEAD MAGNESIUM NIOBATE ELECTROSTRICTIVE MATERIALS - STATIC ANALYSIS, The Journal of the Acoustical Society of America, 103(6), 1998, pp. 3336-3343
New lead magnesium niobate (PMN) ceramics, which can generate large st
rains at moderate electric fields, are good candidates for future actu
ators or sonar projectors. In this paper, two finite element models ar
e proposed to describe static analysis of electrostrictive materials.
Both models include quadratic dependence of strain with electrical dis
placement, assume constant temperature, and exclude hysteresis. One of
the models includes the saturation of the polarization. The theoretic
al formulation is justified by the method of the weighted residuals. T
he numerical implementation is presented. The validation is performed
by comparing numerical results with measurements for a PMN bar subject
ed to mechanical prestress and de electric field. (C) 1998 Acoustical
Society of America.