DOLMEN : Numerical 3D software for Eddy Current Non Destructive Testing

This software was developed (or is under development) within the higher education and research community. Its stability can vary (see fields below) and its working state is not guaranteed.
Higher Edu - Research dev card
  • Creation or important update: 05/06/12
  • Minor correction: 07/06/12
  • Index card author: Laurent Santandrea (LGEP)
  • Theme leader: Teresa Gomez-Diaz (LIGM)
General software features

DOLMEN is a numerical software dedicated to Eddy Current Non Destructive Testing (EC-NDT). The quasi-stationary Maxwell equations are solved using the Finite Element Method in 3D. The dual electric and magnetic formulations with electric and magnetic combined potentials are used in harmonic regime. First order edge and nodal Whitney tetrahedral elements are used. The gauging conditions are avoided using an iterative solver to ensure the uniqueness of the solution.

Specific developments concerning EC-NDT have been made:

  • Taking into account the probe movement.
  • Automatic mesh adaptation based on a local error estimator using the complementarity between the two formulations.
  • Numerical methods dedicated to the thin geometric structures (flaws, thin lift-off , thin coil, deposit, coating, ...).
  • Transmitter/Receiver with common or separated functions.

This code is based on an object oriented approach using the C++ language. Its software architecture is based on the Freefem++ kernel. It is droved by a Python script and it uses Netgen as Mesh generator. Distributed computing can be used to manage probe displacement.

Context in which the software is used

This software is used in research academic NDT frameworks (European research project VERDICT 2003-2006, Competitiveness cluster SYSTEM@TIC PARIS-REGION, french framework SIMCO-IMPACT, collaborative works with Dassault, CEA-LIST, LSS, Univ. Budapest, ...).

Publications related to software

A contribution to connect non-conform meshes with overlapping finite elements, H. Zaidi, L. Santandréa, G. Krebs, Y. Le Bihan, "IGTE", Graz, AT, 19 September 2010, pp. 1-6, Proceedings of IGTE.

Electromagnetic Field Computation in Magnetic and Conductive Thin sheets, A. Ospina Vargas, L. Santandréa, Y. Le Bihan, C. Marchand, Sensor Letters", Vol. 7, Issue: 3, June 2009, pp. 480-485.

Adaptive Mesh Refinement and Probe Signal Calculation in Eddy Current NDT by Complementary Formulations, M. Bensetti, Y. Choua, L. Santandréa, Y. Le Bihan, C. Marchand, IEEE Transaction on magnetics, juin 2008, volume 44, issue 6, pp. 1646-1649.

Crack modelling in ECT with combined potential formulations, Y. Choua, L. Santandréa, Y. Le-Bihan, C. Marchand, IEEE Transactions on magnetics, April 2007, Volume 43, Issue 4, pp. 1789-1792.

Using Mortar Element Method for Eddy Current Testing Finite Element Computations, L. Santandrea, Y. Choua, Y. Le Bihan, C. Marchand, COMPUMAG, Aachen (juin 2007).