Simulation of wave propagation problems for automated characterization of material parameters and defects

Steven Vanderkerckhove, KU Leuven

11 Jul 2016, 16:15–17:45; Location: S2|17-103

Non-destructive testing and evaluation (NDT&E) by ultrasonic (or electromagnetic) waves is important for the identification of material parameters, for quality assurance and life-time control. Many NDT&E techniques and procedures are available, but generally rely on a considerable amount of a priori knowledge and expertise which are often expensive or even unavailable.

In this presentation, numerical field simulation combined with adjoint-based optimisation is considered as an automated NDT&E technique, which can overcome the need for a priori knowledge and expertise. Several techniques for wave speed determination will be evaluated and compared for an elastodynamic example. Also the problem of determining spatially dependent wave speeds will be discussed, with an emphasis on how to avoid important pitfalls.

All simulations have been executed using the discontinuous Galerkin finite element method implemented using DOLFIN/FEniCS. Adjoint computations are obtained from and handled by dolfin-adjoint.

Category: CE Seminar


Technische Universität Darmstadt

Graduate School CE
Dolivostraße 15
D-64293 Darmstadt

Phone+49 6151/16-24401
Fax -24404

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