PSI - Issue 32

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 il l li t . i i t. tr t r l I t rit r i ( )

www.elsevier.com/locate/procedia . l i r. /l t / r i

ScienceDirect

Procedia Structural Integrity 32 (2021) 306–312

© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XXIIth Winter School on Continuous Media Mechanics” Abstract A study was carried out on the effect of misfit deformation in a layered structure made of rigidly adhered media with different classes of axial symmetry. The underlying semi-bounded part of the structure is made of a 6mm hexagonal dielectric, while the upper layered part is made of a material with a rhombic system typical of the aa – phase. The Green's function of a complex medium is constructed, the distribution of poles, phase velocities are obtained. The influence of different values of the misfit strain for the aa – phase on the dynamic characteristics of the structure is studied. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer- review under responsibility of the scientific committee of the XXIIth Winter School on Continuous Media Mechanics” Keywords: aa – phase; ferroelectric, electroelastic; Green function; SH-wave 1. Introduction Using various deformations of mismatch in the creation of acoustoelectronic devices, it is possible to improve their quality characteristics or to achieve optimization in their production. Fei Wang and Wenhui Ma (2018) obtain phase diagram BaTiO3 (011) using the eighth-order free energy coefficients and it was shown that the relative size of the regions of the monoclinic phase is sensitive to electrostriction and elastic constants. Kazumi Watanabe and Kazunari Adachi (2001) study SH waves and clarify major wave phenomena in the transition layer with the non-uniform orientation of the principal axis of anisotropy. Kazumi Watanabe et al. (2002) obtain the Green's function for a cylindrical structure consisting of a monoclinic material. SH waves in free and clamped monoclinic plates were studied byA.L. Shuvalov et al. (2008), also the influence of arbitrary inhomogeneities along the plates was considered. t i t t t i it ti i l t t i i l i it i t l i l t . l i i t t t t i l i l t i , il t l t i t i l it i t t i l t . ' ti l i i t t , t i t i ti l , l iti t i . i l i t l t i it t i t t i t i ti t t t i t i . 202 ut or . Pu lished E I .V. his is n pen cce s ticle u der the C -ND lice t s / rea i e o m s. rg lic es/b -n . i i ilit t i ti i i t t t i t l ti i i : ; f r l tri , l tr l ti ; r f ti ; - . i i i ti i t i t ti t l t i i , it i i l t i t i lit t i ti t i ti i ti i t i ti . i i t i i i i t i t i i t it t t t l ti i t i t li i i iti t l t t i ti l ti t t . i t i i t l i j i t t iti l it t i i t ti t i i l i i t i t t l. t i t ' ti li i l t t i ti li i t i l. i l li i l t t i . . l t l. , l t i l it i iti l t l t i . XXIIth Winter School on Continuous Media Mechanics SH waves in nanoscale ferroelectric thin films in aa – phase Levi M.O.* Southern Scientific Center of Russian Academy of Sciences, ul. Chehova 41, Rostov-on-Don344006, Russian Federation t i tifi t f i f i , l. , t - - , i ti

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* Corresponding author. E-mail address: mlevi@mindonline.ru r i t r. - il : l i i li .r

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer- review under responsibility of the scientific committee of the XXIIth Winter School on Continuous Media Mechanics” - t r . li I . . i i rti l r t - - li ( t : ti . li . ) r- r i r r i ilit f t i tifi i t f t It i t r l ti i i

2452-3216 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XXIIth Winter School on Continuous Media Mechanics” 10.1016/j.prostr.2021.09.044