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On the determination of Young’s modulus of thin films with impulse excitation technique

Published online by Cambridge University Press:  07 December 2016

M.F. Slim*
Affiliation:
ICD-LASMIS, Université de Technologie de Troyes, UMR 6281, CNRS, Antenne de Nogent, Pôle Technologique de Haute-Champagne, Nogent 52800, France; and Nogent International Center for CVD Innovation, LRC CEA-ICD-LASMIS, UTT, Antenne de Nogent-52, Pôle Technologique de Haute-Champagne, Nogent 52800, France
A. Alhussein*
Affiliation:
ICD-LASMIS, Université de Technologie de Troyes, UMR 6281, CNRS, Antenne de Nogent, Pôle Technologique de Haute-Champagne, Nogent 52800, France; and Nogent International Center for CVD Innovation, LRC CEA-ICD-LASMIS, UTT, Antenne de Nogent-52, Pôle Technologique de Haute-Champagne, Nogent 52800, France
A. Billard
Affiliation:
IRTES-LERMPS, UTBM, site de Montbéliard, Belfort cedex 90010, France; and LRC CEA-IRTES-LERMPS, UTBM, site de Montbéliard, Belfort cedex 90010, France
F. Sanchette
Affiliation:
ICD-LASMIS, Université de Technologie de Troyes, UMR 6281, CNRS, Antenne de Nogent, Pôle Technologique de Haute-Champagne, Nogent 52800, France; and Nogent International Center for CVD Innovation, LRC CEA-ICD-LASMIS, UTT, Antenne de Nogent-52, Pôle Technologique de Haute-Champagne, Nogent 52800, France
M. François
Affiliation:
ICD-LASMIS, Université de Technologie de Troyes, UMR 6281, CNRS, Antenne de Nogent, Pôle Technologique de Haute-Champagne, Nogent 52800, France
*
a)Address all correspondence to these authors. e-mail: mohamedfaresslim@gmail.com, mohamed_fares.slim@utt.fr
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Abstract

The purpose of this paper is to propose a critical assessment of Young’s modulus determination of coated materials using Impulse Excitation Technique (IET). In this technique, the coated substrate is excited by an impulse and the acoustic vibrations are recorded. The frequency of the first bending mode is then used in a mechanical model to obtain the Young’s modulus of the coating. The existing models are based on two different theories: the flexural rigidity of a composite beam and the Classical Laminated Beam Theory (CLBT). The aim of the present paper is to assess the accuracy (trueness and precision) of the technique. For this, different models proposed in the literature are compared with a finite element model of the specimen for various conditions. The trueness and precision of models were evaluated and the best model was identified. Then a detailed uncertainty budget is performed to identify and quantify the most influent factors on the global uncertainty.

Type
Articles
Copyright
Copyright © Materials Research Society 2016 

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Footnotes

Contributing Editor: Erik G. Herbert

References

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