Vol. 15, No. 1, 2020

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A new analytical approach for solving equations of elasto-hydrodynamics in quasicrystals

Valery Yakhno

Vol. 15 (2020), No. 1, 135–157

The dynamic equations for quasicrystals are written as time-dependent partial differential equations of the second order relative to phonon and phason displacements. In these equations phonons describe the dynamics of wave propagation and phasons describe diffusion process in quasicrystals. A new approach for deriving a solution (phonon and phason displacements) of the initial value problem is proposed. In this approach the Fourier transform with respect to 3D space variable of the given phonon, phason forces and initial displacements are assumed to be vector functions with components which have finite supports with respect to Fourier parameters for every fixed time variable. The equations for the Fourier images of displacements are reduced to a vector integral equation of the Volterra-type depending on Fourier parameters. The solution of the obtained vector integral equation is solved by successive approximations. Finally, phonon and phason displacements are derived by matrix transformations and the inverse Fourier transform to the solution of the vector integral equation.

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quasicrystals, mechanics of materials, phonon, phason, elastohydrodynamics, analytical method
Mathematical Subject Classification 2010
Primary: 74F10, 35Q74
Received: 10 August 2019
Revised: 11 December 2019
Accepted: 16 December 2019
Published: 26 February 2020
Valery Yakhno
Electrical and Electronics Engineering Department
Dokuz Eylul University
Izmir, Turkey