elastic properties

RESEARCH OF VIBRATION OSCILLATIONS OF MEMS RESONATORS DURING THEIR OPERATION

 A mathematical model has been developed to study the amplitude-frequency characteristics of the resonator beam. Nonlinear mechanics methods were used in the modeling process. The model takes into account the influence of changes in the elastic properties of the beam material on its oscillation amplitude and frequency. To analyze the internal processes in the material, Voigt's and Bolotin's laws were applied.

Elastic moduli of spodumene crystal at pressures up to 2,0 Gpa

The velocities of longitudinal and transverse waves in the six inequivalent crystallographic directions and also the density for spodumene crystal was studied by ultrasonic impulse method in a modified solid-phase installation of high quasihydrostatic pressure up to 2.0 GPa. For samples of spodumene crystal which are oriented with crystallophysical axes the two velocities of transverse waves was obtained during their propagation along each of directions (for different directions of displacement in the wave).