TY - GEN
T1 - Modelling of weld inspection by using a paraxial ray-tracing
AU - Leymarie, N.
AU - Gardahaut, A.
AU - Jezzine, K.
AU - Iakovleva, E.
AU - Chassignole, Bertrand
AU - Rupin, Fabienne
PY - 2013/1/1
Y1 - 2013/1/1
N2 - The controllability of welded joints is a major industrial challenge to meet the requirements of safety and service life of structures. Nevertheless, in most of austenitic welds, ultrasonic detection performances decrease due to unfavourable wave interactions with microstructure. The understanding of such phenomena requires the use of accurate numerical models. In particular, the ray-based model implemented in CIVA can simulate weld inspections considering heterogeneous and anisotropic materials where the microstructure is described using several homogeneous domains. However, according to the size of the domains and the impedance contrast between neighbouring domains, such weld descriptions may lead to discrepancies between simulations and experimental results. To overcome this difficulty, the extension to smoothly inhomogeneous anisotropic media may be performed by using paraxial ray tracing. In this paper, simulation results obtained with this method are presented and compared to finite elements and experimental data on a well-documented sample representative of a weld located in the primary circuit of nuclear power plants. This work is a part of the MOSAICS project, supported by the ANR (French National Research Agency) which aims at significantly improving the understanding of the influence of the weld structure on the performance of ultrasonic NDT inspections.
AB - The controllability of welded joints is a major industrial challenge to meet the requirements of safety and service life of structures. Nevertheless, in most of austenitic welds, ultrasonic detection performances decrease due to unfavourable wave interactions with microstructure. The understanding of such phenomena requires the use of accurate numerical models. In particular, the ray-based model implemented in CIVA can simulate weld inspections considering heterogeneous and anisotropic materials where the microstructure is described using several homogeneous domains. However, according to the size of the domains and the impedance contrast between neighbouring domains, such weld descriptions may lead to discrepancies between simulations and experimental results. To overcome this difficulty, the extension to smoothly inhomogeneous anisotropic media may be performed by using paraxial ray tracing. In this paper, simulation results obtained with this method are presented and compared to finite elements and experimental data on a well-documented sample representative of a weld located in the primary circuit of nuclear power plants. This work is a part of the MOSAICS project, supported by the ANR (French National Research Agency) which aims at significantly improving the understanding of the influence of the weld structure on the performance of ultrasonic NDT inspections.
UR - http://www.scopus.com/inward/record.url?scp=84906216458&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84906216458
SN - 9781629939933
T3 - 52nd Annual Conference of the British Institute of Non-Destructive Testing 2013, NDT 2013
SP - 429
EP - 438
BT - 52nd Annual Conference of the British Institute of Non-Destructive Testing 2013, NDT 2013
PB - British Institute of Non-Destructive Testing
T2 - 52nd Annual Conference of the British Institute of Non-Destructive Testing 2013, BINDT 2013
Y2 - 10 September 2013 through 12 September 2013
ER -