CONTRIBUTION DE LA MICROSCOPIE ACOUSTIQUE A LA CARACTERISATION DES MATERIAUX (APPLICATION A LA DETERMINATION DES CONSTANTES ELASTIQUES)

VALENCIENNES-BU Sciences Lettres (596062101) / SudocSudocFranceF

Relations between single-domain and multidomain piezoelastic properties in single crystals

International audienc

Modeling of the influence of a prestress gradient on guided wave propagation in piezoelectric structures

International audienc

Electro-acoustic characterisations of piezoelectric materials under external mechanical stress: Theory and experiments

International audienc

Full tensorial characterization of PZN-12%PT single crystal by resonant ultrasound spectroscopy

International audienceAn experimental setup based on the electrical excitation of a piezoelectric sample is proposed for resonant ultrasound spectroscopy measurements. The detection of the mechanical vibrations is performed by means of a laser interferometer. At the same time, the free vibrations of piezoelectric parallelepipeds of tetragonal and hexagonal symmetries are modeled taking into account the effect of the sample metalization. The paper presents the full elastic, piezoelectric and dielectric tensors of two PMN-34.5%PT ceramic and PZN-12%PT single crystal cubes