Журнал Российского общества по неразрушающему контролю и технической диагностике
The journal of the Russian society for non-destructive testing and technical diagnostic
 
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22 | 12 | 2024
2020, 03 March

DOI: 10.14489/td.2020.03.pp.044-053

 

Kozlov A. V.
MEASURING OF ELASTIC MODULI BY MEANS OF SUB-SURFACE SOUNDING METHOD
(pp. 44-53)

Abstract. The method of determination of elastic moduli for different materials by means of measuring of longitudinal and shear waves’ velocities is discussed in the paper. The velocities are measured by obtaining the time of flight between a pair of low frequency ultrasonic dry point contact transducers installed on the surface of the studied material sample. Factors defining the accuracy of such measurement are indicated which mainly consist of physical velocity frequency dispersion, fundamental although small differences between static and dynamic elastic moduli measurements, velocity dependence on temperature etc. Comparison between Young’s modulus and Poisson’s ratio, obtained experimentally and from table data, is given for various plastics and steel samples. It shows good agreement of different methods’ data and demonstrates the applicability of the suggested elastic moduli ultrasonic sub-surface measurement method.

Keywords: измерение упругих констант акустическим методом, преобразователи с сухим точечным контактом.

A. V. Kozlov (Acoustic Control Systems, Ltd., Moscow, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.  

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