Simulation of ultrasonic wave propagation in welds using ray-based methods

12th Anglo-French Physical Acoustics Conference

Gardahaut, A.^1 ; Jezzine, K.^1 ; Cassereau, D.^2,3 ; Leymarie, N.^1

CEA, LIST, F91191 Gif-Sur-Yvette, France^1

CNRS, UMR 7623, LIP, 15 rue de l'école de médecine, 75006 Paris, France^2

ESPCI ParisTech, 10 rue Vauquelin, 75005 Paris, France^3

关键词: Austenitic;    Bimetallic welds;    Closed form;    Distribution of grains;    Inhomogeneous anisotropic medium;    Inhomogeneous property;    Propagation modeling;    Transport equation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/498/1/012008/pdf
DOI  :  10.1088/1742-6596/498/1/012008

来源: IOP

【 摘 要 】

Austenitic or bimetallic welds are particularly difficult to control due to their anisotropic and inhomogeneous properties. In this paper, we present a ray-based method to simulate the propagation of ultrasonic waves in such structures, taking into account their internal properties. This method is applied on a smooth representation of the orientation of the grain in the weld. The propagation model consists in solving the eikonal and transport equations in an inhomogeneous anisotropic medium. Simulation results are presented and compared to finite elements for a distribution of grain orientation expressed in a closed-form.