Mathematics & Physics 2015, 8(1), 7–21 УДК 548.0:534 Influence of Uniaxial Pressure on Elastic Waves Propagation in Piezoelectric Layered Structures "Y-cut langasite/fused silica" Sergey I.Burkov∗ Institute of Engineering Physics and Radio Electronics Siberian Federal University Svobodny, 79, Krasnoyarsk, 660041 Russia Olga P. Zolotova† Siberian State Aerospace University Krasnoyarskiy Rabochiy, 31, Krasnoyarsk, 660014 Russia Pavel P.Turchin‡ Institute of Engineering Physics and Radio Electronics Siberian Federal University Svobodny, 79, Krasnoyarsk, 660041 Russia Received 15.09.2014, received in revised form 20.10.2014, accepted 25.11.2014 The study of influence of external uniaxial mechanical stress on the dispersive characteristics and anisotropy of elastic waves in such piezoelectric structures as “Y -cut La3Ga5SiO14/fused silica” has been conducted. <...> The results of computer simulation taking into account the linear and nonlinear material constants of materials have been presented. <...> The comparison of elastic wave velocity changes under the influence of an uniaxial stress while a full set of nonlinear material constants of crystalline layer + geometric nonlinearity, or only geometric nonlinearity of the layer induced by the static deformation of a substrate has been fulfilled. <...> Keywords: piezoelectric layered structure, Rayleigh wave, Love wave, initial stress influence. <...> All rights reserved c – 7 – Sergey I.Burkov, Olga P.Zolotova, Pavel P.Turchin Influence of Uniaxial pressure on Elastic Waves . <...> When studying or designing the acoustic wave sensor, it is assumed that the piezoelectric device’s behavior will be linear. <...> The results of changes in the physical properties of crystal under the uniaxialmechanical pressure influence [5,6] were used to stabilize the resonator’s frequency, especially for temperature compensation of the resonators’ frequency escape on the basis of quartz crystals and langasite [7,8]. <...> The analysis of changes in SAW velocity induced by radial force and torque’s application to the resonator on the basis of quartz and langasite crystals was obtained by the authors [9]. <...> It is noted that thirdorder crystal material tensors ignoring leads to considerable error in the resonance frequency drift determination. <...> The general theory of ground wave propagation in a piezoelectric crystal under conditions <...>