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Title: Recent Advances in Simulation of Eddy Current Testing of Tubes and Experimental Validations

Abstract

Eddy current testing (ECT) is widely used in iron and steel industry for the inspection of tubes during manufacturing. A collaboration between CEA and the Vallourec Research Center led to the development of new numerical functionalities dedicated to the simulation of ECT of non-magnetic tubes by external probes. The achievement of experimental validations led us to the integration of these models into the CIVA platform. Modeling approach and validation results are discussed here. A new numerical scheme is also proposed in order to improve the accuracy of the model.

Authors:
;  [1];  [2];  [3]
  1. CEA LIST, CEA Saclay, DRT/DETECS/SYSSC/LSM, Batiment 611, 91191 Gif-sur-Yvette (France)
  2. Laboratoire des Signaux et Systemes (L2S), Supelec - 3 rue Joliot-Curie, 91190 Gif-sur-Yvette (France)
  3. SETVAL, Centre de Recherche VALLOUREC, Route de Leval, BP 20149, 59620 Aulnoye Aymeries (France)
Publication Date:
OSTI Identifier:
21054963
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 894; Journal Issue: 1; Conference: Conference on review of progress in quantitative nondestructive evaluation, Portland, OR (United States), 30 Jul - 4 Aug 2006; Other Information: DOI: 10.1063/1.2717979; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; COMPUTERIZED SIMULATION; EDDY CURRENT TESTING; IRON; MANUFACTURING; NUMERICAL ANALYSIS; PROBES; STEELS; TUBES; VALIDATION

Citation Formats

Reboud, C., Premel, D., Lesselier, D., and Bisiaux, B. Recent Advances in Simulation of Eddy Current Testing of Tubes and Experimental Validations. United States: N. p., 2007. Web. doi:10.1063/1.2717979.
Reboud, C., Premel, D., Lesselier, D., & Bisiaux, B. Recent Advances in Simulation of Eddy Current Testing of Tubes and Experimental Validations. United States. doi:10.1063/1.2717979.
Reboud, C., Premel, D., Lesselier, D., and Bisiaux, B. Wed . "Recent Advances in Simulation of Eddy Current Testing of Tubes and Experimental Validations". United States. doi:10.1063/1.2717979.
@article{osti_21054963,
title = {Recent Advances in Simulation of Eddy Current Testing of Tubes and Experimental Validations},
author = {Reboud, C. and Premel, D. and Lesselier, D. and Bisiaux, B.},
abstractNote = {Eddy current testing (ECT) is widely used in iron and steel industry for the inspection of tubes during manufacturing. A collaboration between CEA and the Vallourec Research Center led to the development of new numerical functionalities dedicated to the simulation of ECT of non-magnetic tubes by external probes. The achievement of experimental validations led us to the integration of these models into the CIVA platform. Modeling approach and validation results are discussed here. A new numerical scheme is also proposed in order to improve the accuracy of the model.},
doi = {10.1063/1.2717979},
journal = {AIP Conference Proceedings},
number = 1,
volume = 894,
place = {United States},
year = {Wed Mar 21 00:00:00 EDT 2007},
month = {Wed Mar 21 00:00:00 EDT 2007}
}
  • Recent advances are presented to model discontinuities in random anisotropies that arise in certain materials, such as titanium alloys. A numerical model is developed to provide a full anisotropic representation of each crystalline in a gridded region of the material. Several simulated and experimental demonstrations are presented highlighting the effect of grain noise on eddy current measurements. Agreement between VIC-3D(c) model calculations and experimental data in titanium alloy specimens with known flaws is demonstrated.
  • Use of a 3D eddy current program to simulate an eddy current probe system is described. Whilst there is great difficulty in accurate representation of fine cracks, the finite-element method works reasonably well for the investigation of thin tubes, and it can model the effects of eccentricities and variations in wall thickness, so long as attention is paid to the meshing.
  • Purpose: A GPU-based Monte Carlo (MC) simulation package gPMC has been previously developed and high computational efficiency was achieved. This abstract reports our recent improvements on this package in terms of accuracy, functionality, and code portability. Methods: In the latest version of gPMC, nuclear interaction cross section database was updated to include data from TOPAS/Geant4. Inelastic interaction model, particularly the proton scattering angle distribution, was updated to improve overall simulation accuracy. Calculation of dose averaged LET (LETd) was implemented. gPMC was ported onto an OpenCL environment to enable portability across different computing devices (GPUs from different vendors and CPUs). Wemore » also performed comprehensive tests of the code accuracy. Dose from electro-magnetic (EM) interaction channel, primary and secondary proton doses and fluences were scored and compared with those computed by TOPAS. Results: In a homogeneous water phantom with 100 and 200 MeV beams, mean dose differences in EM channel computed by gPMC and by TOPAS were 0.28% and 0.65% of the corresponding maximum dose, respectively. With the Geant4 nuclear interaction cross section data, mean difference of primary proton dose was 0.84% for the 200 MeV case and 0.78% for the 100 MeV case. After updating inelastic interaction model, maximum difference of secondary proton fluence and dose were 0.08% and 0.5% for the 200 MeV beam, and 0.04% and 0.2% for the 100 MeV beam. In a test case with a 150MeV proton beam, the mean difference between LETd computed by gPMC and TOPAS was 0.96% within the proton range. With the OpenCL implementation, gPMC is executable on AMD and Nvidia GPUs, as well as on Intel CPU in single or multiple threads. Results on different platforms agreed within statistical uncertainty. Conclusion: Several improvements have been implemented in the latest version of gPMC, which enhanced its accuracy, functionality, and code portability.« less