Accession Number : AD0619715

Title :   EFFECTS OF EXTERNAL FORCES ON VIBRATING CRYSTAL PLATES.

Descriptive Note : Rept. no. 16 (final), 1 May 63-30 Apr 65,

Corporate Author : LOWELL TECHNOLOGICAL INST RESEARCH FOUNDATION MASS

Personal Author(s) : Mingins,Charles R. ; Barcus,Luther C. ; Perry,Robert W.

Report Date : 30 APR 1965

Pagination or Media Count : 61

Abstract : The purpose of the work is to investigate methods leading to the design of quartz crystal units that are stable with respect to mechanically induced vibration and acceleration. Numerous experimental and theoretical aspects of the reactions of a vibrating piezoelectric plate to the application of external steady forces and torques were considered. New material deals with such matters as further illuminating cases of selectively induced force fields, the degree of linearity of tensile forces applied at an azimuthal angle of low sensitivity in frequency, some experiments on torsional stresses, and some curves which evolve from theory. The overall summary covers flexural stress experiments, compression normal to the major faces, the stress coefficient of frequency, tensile stress relationships, the general nature of force field studies, and the relative efficacy of nonlinear and perturbational methods of analysis.

Descriptors :   (*QUARTZ, STRESSES), (*PIEZOELECTRIC CRYSTALS, VIBRATION), STABILITY, ACCELERATION, FREQUENCY, TENSILE PROPERTIES, PERTURBATION THEORY, NONLINEAR SYSTEMS, FORCE(MECHANICS)

Distribution Statement : APPROVED FOR PUBLIC RELEASE