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Updated: Feb 23, 2026

Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads
Published on: July 25, 2025
Weld inspection by focused adjoint method
Khaled Metwally1, Emma Lubeigt2, Sandrine Rakotonarivo1
1Aix-Marseille Université, CNRS, Centrale Marseille, LMA, Marseille, France.
Abstract:
This paper reports a methodology for the non-destructive ultrasonic evaluation of welds, based on probing, residue back-focusing and topological energy calculation using an enhanced (focused) adjoint method. The proposed method combines the advantages of time reversal to compensate for the cumulative distorsions experienced by a wave propagating in a heterogeneous medium, and topological imaging to highlight the defect location. The synergistic effect of this combined approach makes it possible to detect anomalies in the most efficient way. The method paves the way towards a matched-insonification imaging of anomalies in anisotropic media.
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