10.14489/td.2017.05.pp.014-027

2017, 05 May

DOI: 10.14489/td.2017.05.pp.014-027

Danilov V. N.
CALCULATION MODEL OF DISPLACEMENT OF QUASISHEAR WAVES RADIATED BY THE ANGLE BEAM PROBE IN THE TRANSVERSELY ISOTROPIC MATERIAL
(pp. 14-27)

Abstract. The article deals with the calculation model of displacement of quasishear waves radiated by the angle beam probe in the transversely isotropic material with an axis of symmetry, an orthogonal surface of the control, in approach of weak anisotropy. The asymptotic formula of shear wave displacement are obtained by the method of a stationary phase. It coincides with known for isotropic material. It is shown, that in a wedge of the angle beam probe the acoustic wave is distributed with phase velocity of a longitudinal wave (conterminous with group velocity for isotropic material), and in transversely isotropic material - with group velocity quasishear waves, thus the size of directivity characteristics is defined by a corner of an inclination of a vector of phase velocity to a normal to a surface of the control. Calculations of directivity characteristics of the piezoplate angle beam probe (on I. N. Ermolov) have revealed some features of influence of anisotropy of material on the directivity characteristics which is dependent on a nominal angle of probe and size of anisotropy. Use of the received results of modelling the angle beam probe radiation in the transversely isotropic material may be useful, for example, for development of models of acoustic channels of the ultrasonic control through plating in view of its anisotropic properties.

Keywords: angle beam probe, quasishear wave, anisotropy, transversely isotropic material, elastic constant, wave vector, angle of probe, phase velocity, group velocity, directivity characteristic, ultrasonic technique, surface of the control.

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V. N. Danilov (JSC “RPA “CNIITMASH”, Moscow, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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