Title :
Identification of material tensors for piezoceramic materials
Author :
Kaltenbacher, B. ; Kaltenbacher, M. ; Lerch, R. ; Simkovics, R.
Author_Institution :
Ind. Math. Inst., Linz Univ., Austria
Abstract :
A new iterative scheme for the exact reconstruction of piezoelectric material parameters from electric impedance measurements is proposed. It is based on finite element simulations of the full piezoelectric equations, combined with a Newton-conjugate gradient inversion scheme. Experiments for a thickness resonator demonstrate that this method is able to avoid (undesirable) inaccuracies occurring in conventional simplified model parameter estimation techniques
Keywords :
Jacobian matrices; Newton method; conjugate gradient methods; crystal resonators; dielectric polarisation; elasticity; electric impedance; finite element analysis; matrix inversion; parameter estimation; permittivity; piezoceramics; tensors; Jacobi matrix; Newton-conjugate gradient inversion; Rayleigh damping; elasticity coefficients; electric impedance measurements; exact reconstruction; finite element simulations; full piezoelectric equations; inverse problem; iterative scheme; material tensors identification; model parameter estimation; piezoceramic materials; piezoelectric coupling coefficients; polarization; thickness resonator; Boundary conditions; Character generation; Differential equations; Finite element methods; Impedance measurement; Mathematics; Parameter estimation; Piezoelectric materials; Tensile stress; Testing;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.921501
