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Evaluation of sharp indentation testing of thin films and ribbons on hard substrates
KTH, Superseded Departments, Solid Mechanics.ORCID iD: 0000-0001-6232-8819
2002 (English)In: Journal of Testing and Evaluation, ISSN 0090-3973, Vol. 30, no 1, 64-73 p.Article in journal (Refereed) Published
Abstract [en]

A numerical investigation of sharp indentation of thin films and ribbons has been conducted using the finite element method. For a wide variety of material behavior, the critical ratio of indentation depth to thin film thickness is determined for the case of indentation of thin films or ribbons perfectly clamped on hard substrates. The critical ratio is defined as the ratio at which the indentation response can no longer be considered closely acceptable to the corresponding response at indentation of bulk materials. The indentation parameters investigated are hardness (average contact pressure), the size of the contact area between indenter and material, and the initial unloading slope of the indentation load-indentation depth curve. The implications of the results for material characterization of thin films and ribbons by indentation are discussed in some detail.

Place, publisher, year, edition, pages
2002. Vol. 30, no 1, 64-73 p.
Keyword [en]
sharp indentation, material characterization, thin films, hardness, contact area, indentation load, indentation depth, finite element calculations, vickers indentation, critical ratio, nanoindentation, simulation, thickness, depth
URN: urn:nbn:se:kth:diva-21304ISI: 000173711800008OAI: diva2:340002
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Larsson, Per-Lennart
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