Contact problems at nano/microscale and depth sensing indentation techniques

Borodich, Feodor M. ORCID: https://orcid.org/0000-0002-7935-0956 2010. Contact problems at nano/microscale and depth sensing indentation techniques. Materials Science Forum 662 , pp. 53-57. 10.4028/www.scientific.net/MSF.662.53

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Abstract

An overview of development of indentation techniques and connections between contact mechanics and methods of extracting mechanical characteristics from indentation data is given. Observed disagreements between the experimental observations and the models of indentation are discussed. It is shown that this disagreement is often caused by violation of hypotheses that are used in the formulation of the appropriate boundary-value contact problems and strictly speaking one cannot apply directly the solutions of Hertz type contact problems to indentation tests employing the sharp indenters. It is shown that commonly used experimental test involving sharp pyramidal and conical indenters may be applied to study plastic properties of materials while this approach is not very accurate for estimations of elastic modulus of the test solid. The recently proposed by Borodich and Galanov non-direct method that employs data of elastically loading of a spherical indenter is described. It is argued that the non-direct method can be used for determination of both the work of adhesion and elastic modulus of the tested material

Item Type:	Article
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords:	Adhesive Contact; BG Non-Direct Method; Contact Mechanics; Elastic Characteristics of Material; Hardness; Ill-Posed Problem; Nanoindentation; Plastic Characteristics of Material; Self-Similarity
Publisher:	Trans Tech Publications
ISSN:	0255-5476
Last Modified:	18 Oct 2022 14:17
URI:	https://orca.cardiff.ac.uk/id/eprint/17059

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