Direct model optimisation for data inversion. Application to ultrasonic characterisation of heterogeneous welds

Cécile Gueudré; Loïc Le Marrec; Joseph Moysan; Bertrand Chassignole

hal-00365527, version 1

Direct model optimisation for data inversion. Application to ultrasonic characterisation of heterogeneous welds

Cécile Gueudré () ¹, Loïc Le Marrec () ², Joseph Moysan () ¹, Bertrand Chassignole () ³

NDT & E International 42, 1 (2009) 47-55

Abstract: Numerous multipass welds in austenitic stainless steel are made on the primary circuits of nuclear power stations. The heterogeneous anisotropic nature of these welds causes disturbance to ultrasonic propagation. Simulation is a useful tool when attempting to understand physical phenomena. With this objective, a finite element code called ATHENA was developed. Sufficiently realistic modelling of the material is proposed by the Modelling anIsotropy from Notebook of Arc welding (MINA) model, which determines the orientation of the weld grains. Optimisation by inversion of the MINA model is proposed in this study. The results validate the strategy and open perspectives regarding use on real data.

1: Laboratoire de Caractérisation Non Destructive (LCND)
Université de la Méditerranée - Aix-Marseille II
2: Institut de Recherche Mathématique de Rennes (IRMAR)
CNRS : UMR6625 – Université de Rennes 1 – École normale supérieure de Cachan - ENS Cachan – Institut National des Sciences Appliquées (INSA) : - RENNES – Université de Rennes II - Haute Bretagne
3: EDF R&D
EDF

hal-00365527, version 1
http://hal.archives-ouvertes.fr/hal-00365527
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From: Maryse Collin <>
Submitted on: Tuesday, 3 March 2009 16:27:12
Updated on: Thursday, 25 February 2010 16:21:53

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DOI: 10.1016/j.ndteint.2008.07.003

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