Determination of elastic constants by line-focus acoustic microscopy : effect of initial Cij values on the Simplex method and influence of geometric probe parameters on the Kushibiki method

Michael Lematre (1) , Youssef Benmehrez (1) , G. Bourse (1) , Wei-Jiang Xu (2, 3) , Mohamed Ourak (2, 3)

1 Mines Douai EMD - École des Mines de Douai
2 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
3 IEMN-DOAE - Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520

The velocity of leaky surface acoustic waves (SAWs) is obtained for different directions of propagation (φ) from the V(z) curves by using the Kuschibiki method. The comparison of measured and calculated velocities consists in the minimization of the summation of the square difference Σ|VΦc-VΦm|2 by using a Simplex method. The effect of the initial values of cij on the final result is discussed in the case of cubic-crystallite solids. The influence of the transducer parameters on the SAW velocity is also discussed.

Mots clés: Ultrasonics quantum acoustics and physical effects of sound; Nondestructive testing: ultrasonic testing photoacoustic testing; Elasticity elastic constants

Domaines: Sciences de l'ingénieur [physics]

Michael Lematre, Youssef Benmehrez, G. Bourse, Wei-Jiang Xu, Mohamed Ourak. Determination of elastic constants by line-focus acoustic microscopy : effect of initial Cij values on the Simplex method and influence of geometric probe parameters on the Kushibiki method. QUANTITATIVE NONDESTRUCTIVE EVALUATION, Jul 2001, Brunswick, United States. pp.1361-1368, ⟨10.1063/1.1472953⟩. ⟨hal-00149917⟩