Accession Number : AD0715137

Title :   Forced Electromechanical Vibrations of a Sodium-Chloride Plate.

Descriptive Note : Technical rept.,

Corporate Author : COLUMBIA UNIV NEW YORK DEPT OF CIVIL ENGINEERING AND ENGINEERING MECHANICS

Personal Author(s) : Mindlin,Raymond D.

Report Date : OCT 1970

Pagination or Media Count : 24

Abstract : A recent extension of the classical theory of elastic dielectrics, to include an interaction between strain and polarization gradient, admits the possibility of excitation of electromechanical vibrations in crystals with a center of material symmetry; i.e., those in which there can be no classical piezoelectric effect. The new equations are applied to a case of forced thickness vibrations of a plate of sodium chloride crystal and the fundamental frequency, mode shape and electromechanical coupling coefficient are calculated--all subject to an assumption, regarding boundary conditions, which can be tested experimentally. (Author)

Descriptors :   (*SODIUM CHLORIDE, VIBRATION), DIELECTRIC FILMS, CAPACITANCE, PIEZOELECTRIC CRYSTALS, STRESSES, POLARIZATION

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE