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Assessment of Uncertainty in Modelled Ultrasonic Thickness Measurements

  • Damir Markučič , Biserka Runje and Josip Stepanić
Published/Copyright: May 28, 2013
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Abstract

Recently, through several documents ranging from guidelines to standards, it has been suggested to strengthen the quantitative character of non-destructive testing results and its implementation has been proposed. For the study behind this article, the formulated scheme on the ultrasonic thickness measurement has been applied, which is a typical procedure within ultrasonic testing. The regular situation is described, formalized through formulating the accompanied model, and its measurement uncertainty is estimated by using a Monte-Carlo based simulation. The obtained results provide a significant contribution to the approach to evaluate the testing system capability, to its step-by-step improvement as well as to direct tracing of consequences of any change in its characteristics.

Kurzfassung

In Form mehrerer Dokumente, die von Richtlinien bis zu Normen reichen, wird kürzlich immer wieder vorgeschlagen, den quantitativen Charakter der Ergebnisse der zerstörungsfreien Prüfung stärker herauszuheben, und es wird hierzu auch die Implementierung vorgeschrieben. In der diesem Beitrag zugrunde liegenden Studie wurde ein vorformuliertes Schema für die Ultraschall- Dickenmessung angewendet, wobei es sich um eine typische Prozedur in der Ultraschallprüfung handelt. Es wird die reguläre Situation beschrieben, die dann durch die Formulierung des begleitenden Modells formalisiert wird, und die Messunsicherheit wird mittels Monte-Carlo-Simulation abgeschätzt. Die Ergebnisse stellen einen signifikanten Beitrag dieses Ansatzes dar, um die Möglichkeiten des Testsystems zu evaluieren, und um dessen schrittweise Verbesserung vorzunehmen, sowie um die Konsequenzen der Änderungen seiner Charakteristika direkt nachverfolgen zu können.


Damir Markučič achieved his B.Sc. in 1990, and his M.Sc. in 1996 as well as his Ph.D. in 1998 from the Faculty of Mechanical Engineering and Naval Architecture at the University of Zagreb. There, he is head of the Department for NDT. His specialisation repeatability and reproducibility analysis, ultrasonic testing is in the fields of quality management.

Biserka Runje achieved her B.Sc. in 1987, and her M.Sc. 1997 as well as her Ph.D. in 2002 from the Faculty of Mechanical Engineering and Naval Architecture at the University of Zagreb. She is researcher in the fields of metrology and quality management, with an expertise in measurement system characterisation.

Josip Stepanić achieved his B.Sc. in 1994, and his M.Sc. in 1998 from the Faculty of Science as well as his Ph.D. in 2003 from the Faculty of Mechanical Engineering and Naval Architecture at the University of Zagreb. He is researcher in the fields of metrology and NDT, with an emphasis on ultrasonic testing.


References

1 K. A.Fowler, G. M.Elfbaum, K. A.Smith, T. J.Nelligan: Theory and application of precision ultrasonic thickness gaging, The e-Journal of Nondestructive Testing, 1997, http://www.ndt.net/article/wt1097/panam/panam.htm.Search in Google Scholar

2 D. J.Cotter, J. E.Michaels, Z.Zhang, E.Ghabour, T.Nelligan, A.Abbate, D.Kass, G.Elfbaum: High frequency ultrasonic thickness and acoustic velocity measurement methods for advanced material and component characterization, Online-Proc. of the 8th ECNDT, Barcelona (2002), http://www.ndt.net/article/ecndt02/175/175.htm.Search in Google Scholar

3 A. I.Lavrentyev, S. I.Rokhlin: An ultrasonic method for determination of elastic moduli, density, attenuation and thickness of a polymer coating on a stiff plate, Ultrasonics39 (2001), pp. 21122110.1016/S0041-624X(00)00066-4Search in Google Scholar

4 M.Ezzaïdi, D.Décultot, G.Maze, A.Moudden: Measurement of the thickness of a cylindrical shell with a focused beam, NDT&E Int35 (2002), pp. 43343610.1016/S0963-8695(02)00016-6Search in Google Scholar

5 EN 583-5:2000: Non-Destructive Testing – Ultrasonic Examination – Part 5: Characterization and Sizing of DiscontinuitiesSearch in Google Scholar

6 EN 12223:2000: Non-Destructive Testing – Ultrasonic Examination – Specification for Calibration Block No. 1Search in Google Scholar

7 EN 27963:2000: Welds in Steel – Calibration Block No.2 for Ultrasonic Examination of WeldsSearch in Google Scholar

8 H. W.Coleman, W.Glenn Steele: Experimentation and Uncertainty Analysis for Engineers, 2nd Edition, Wiley & Sons, New York (1999)Search in Google Scholar

9 JCGM 100:2008: Evaluation of Measurement Data — Guide to the Expression of Uncertainty in MeasurementSearch in Google Scholar

10 JCGM 101:2008: Evaluation of Measurement Data – Supplement 1 to the Guide to the Expression of Uncertainty in Measurement – Propagation of Distributions Using a Monte Carlo MethodSearch in Google Scholar

11 M.Cox, P.Harris: Numerical Methods for Propagation Distributions, planned supplemental guide to GUM, Proc. of the Euromet Length Workshop (2001)Search in Google Scholar

12 B. R. L.Siebert: Monte-Carlo Methods: Scope and Limitations, Proc. of the 160th PTB Seminar, Braunschweig (2001)Search in Google Scholar

Published Online: 2013-05-28
Published in Print: 2011-04-01

© 2011, Carl Hanser Verlag, München

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