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Title: Numerical and experimental indentation tests considering size effects
Authors: Harsono, E.
Swaddiwudhipong, S. 
Liu, Z.S.
Shen, L.
Keywords: Conventional mechanism based strain gradient plasticity
Finite element method
Indentation size effect
Indentation test
Simulated indentation
Issue Date: 15-Mar-2011
Citation: Harsono, E., Swaddiwudhipong, S., Liu, Z.S., Shen, L. (2011-03-15). Numerical and experimental indentation tests considering size effects. International Journal of Solids and Structures 48 (6) : 972-978. ScholarBank@NUS Repository.
Abstract: A series of nanoindentation experiments with maximum depths varying from 1200 to 2500 nm were conducted to study indentation size effects on copper, aluminium alloy and nickel. As expected, results from classical plasticity simulation deviate significantly from experimental data for indentation at micron and submicron levels. C0 continuity finite element analysis incorporating the conventional theory of mechanism-based strain-gradient (CMSG) plasticity has been carried out to simulate spherical and Berkovich indentation tests at micron level where size effect is observed. The results from both numerical and actual spherical and Berkovich indentation tests demonstrate that materials are significantly strengthened for deformation at this level and the proposed approach is able to provide reasonably accurate results. © 2010 Elsevier Ltd. All rights reserved.
Source Title: International Journal of Solids and Structures
ISSN: 00207683
DOI: 10.1016/j.ijsolstr.2010.12.002
Appears in Collections:Staff Publications

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