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7. Glossary
Onde ultrasonore ; Ultrasonic Wave
An ultrasonic wave is a mechanical vibration with a frequency above 20 kHz. In the field of non-destructive testing, frequencies in the MHz range are used. In some highly targeted applications, where small samples are studied, frequencies in excess of GHz are used. In such cases, the term "hypersound" is sometimes used.
Onde longitudinale; Longitudinal Wave
A wave or vibration whose direction of propagation is collinear with the mechanical displacement. The term "compression wave" may also be used.
Transverse wave; Shear Wave
A wave or vibration whose direction of propagation is perpendicular to the mechanical displacement. The term "shear wave" may also be used.
Time of Flight; Temps de vol
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Glossary
Bibliography
Standards and norms
- Standard Practice for Measuring Ultrasonic Velocity in Materials, ASTM International, West Conshohocken, PA - ASTM E494-15 - 2015
Patents
MARTINOTY (P.), COLLIN (D.). Piezo-Rheometric Measuring Cell and Corresponding Piezo-Rheometer. US 20080236255 A1. WO 2006/018516.
SINHA (D.N.). – Non invasive identification of fluids by swept-frequency acoustic interferometry. Patent number 5767407 (1998).
Software tools
Disperse Software. Guided wave dispersion curve calculation. Developed by LOWE (M.J.S.) et al, Imperial College London NDT.
Cast3M – Finite element calculation software developed by the French Atomic Energy Commission (CEA).
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