ORBi: Guo Weichao - Influence of friction in material characterization in micro-indentation measurement

Reference : Influence of friction in material characterization in micro-indentation measurement


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Mechanical engineering Engineering, computing & technology : Materials science & engineering Engineering, computing & technology : Computer science
	To cite this reference:	http://hdl.handle.net/2268/5932

Title :	Influence of friction in material characterization in micro-indentation measurement
Language :	English
Author, co-author :	Guo, Weichao [Université de Liège - ULg > > > Doct. sc. ingé. (aérosp. & méca. - Bologne)]
	Rauchs, G. [Laboratoire de Technologies Industrielles, Centre de Recherche Public Henri Tudor, L-4221 Esch-sur-Alzette, Luxembourg > > > >]
	ZHang, W. H. [Laboratory of Engineering Simulation and Aerospace Computing (ESAC), Northwestern Polytechnical University, Xi'an 710072, China > > > >]
	Ponthot, Jean-Philippe [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire >]
Publication date :	2010
Journal title :	Journal of Computational & Applied Mathematics
Publisher :	Elsevier Science
Volume :	234
Pages :	2183-2192
Audience :	International
ISSN :	0377-0427
City :	Amsterdam
Country :	The Netherlands
Keywords :	[en] Indentation ; Friction ; Piling-up or Sinking-in ; Hardness ; Finite element
Abstract :	[en] A comprehensive computational study is undertaken to identify the influence of friction in material characterization by indentation measurement based on elasto- plastic solids. The impacts of friction on load versus indentation depth curve, and the values of calculated hardness and Young's modulus in conical and spherical indentations are shown in this paper. The results clearly demonstrate that, for some elasto-plastic materials, the curves of load versus indentation depth obtained either by spherical or conical indenters with different friction coefficients, cannot be distinguished. However, if utilizing the parameter (see text for details), to quantify the deformation of piling-up or sinking-in, it is easy to find that the influence of friction on piling-up or sinking-in in indentation is significant. Therefore, the material parameters which are related to the projected area will also have a large error caused by the influence of friction. The maximum differences on hardness and Young's modulus can reach 14.59% and 6.78%, respectively, for some elastic materials shown in this paper. These results do not agree with those from researchers who stated that the instrumented indentation experiments are not significantly affected by friction.
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/5932
DOI :	10.1016/j.cam.2009.08.072

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