NDLI: Indentation and imprint mapping for the identification of interface properties in film-substrate systems

Content Provider	Springer Nature Link
Author	Bocciarelli, M. Bolzon, G.
Copyright Year	2009
Abstract	Indentation tests are frequently employed at present for the identification of material parameters at different scales. An innovative inverse analysis technique, recently proposed by the Authors, combines the traditional indentation test with the mapping of the residual deformations (imprint), thus providing experimental data apt to be used to identify material parameters in film-substrate systems. In this paper, such methodology is enhanced to permit the identification of the fracture properties of the interface between a coating and its substrate once the bulk material parameters are known. In order to make the inverse problem well posed, a further set of experimental data, namely the horizontal displacement field measured on the film external surface, is considered as available experimental information. The sought material parameters are recovered through recursive calculations of the mechanical response of the film-substrate system, performed by a finite strain numerical simulation. The coating and a significant portion of the underlying bulk material are incorporated in the finite element models built up to this purpose, while delamination is accounted for through cohesive elements. The inverse analysis procedure rests on a batch, deterministic approach and conventional optimization algorithms are employed for the minimization of a suitably defined discrepancy norm. Extensive numerical computations have been performed in order to test the performance of the proposed methodology in terms of result accuracy and computational effort.
Starting Page	1
Ending Page	17
Page Count	17
File Format	PDF
ISSN	03769429
Journal	International Journal of Fracture
Volume Number	155
Issue Number	1
e-ISSN	15732673
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-02-12
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Indentation Imprint mapping Inverse analysis Film substrate systems Interface properties Mechanical Engineering Automotive Engineering Civil Engineering Mechanics Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Computational Mechanics Modeling and Simulation

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