Publication detail
Multiscale Modelling of Nanoindentation Test in Copper Crystal
HORNÍKOVÁ, J. ŠANDERA, P. ČERNÝ, M. POKLUDA, J.
Czech title
Víceúrovňové modelování nanoindentace v krystalu mědi
English title
Multiscale Modelling of Nanoindentation Test in Copper Crystal
Type
journal article in Web of Science
Language
en
Original abstract
The nanoindentation test in the dislocation free crystal of copper is simulated by a nonlinear elastic finite element analysis coupled with both ab initio calculations of the ideal shear strength and crystallographic considerations. The onset of microplasticity, associated with the pop-in effect identified in experimental nanoindentation tests (creation of first dislocations), is assumed to be related to the moment of achieving the value of the ideal shear strength for the copper crystal. Calculated values of the critical indentation depth lie within the range of experimentally observed pop-ins in the copper crystal. The related indentation load is somewhat lower than that observed in the experiment.
Czech abstract
Zkouška nanotvrdosti v bezdislokační oblasti krystalu mědi je simulována nelineární elastickou analýzou při užití metody konečných prvků, doplněnou prvoprincipiálními výpočty ideální smykové pevnosti a krystalografickými úvahami. Počátek mikroplastického chování krystalu, spojeného s emisí dislokací, experimentálně zjišťovaného v průběhu měření nanotvrdosti, je považován za okamžik dosažení ideální smykové pevnosti pro krystal mědi. Vypočtené hodnoty nanoindentační síly leží v intervalu experimentálně pozorovaných nestabilit v krystalu mědi.
English abstract
The nanoindentation test in the dislocation free crystal of copper is simulated by a nonlinear elastic finite element analysis coupled with both ab initio calculations of the ideal shear strength and crystallographic considerations. The onset of microplasticity, associated with the pop-in effect identified in experimental nanoindentation tests (creation of first dislocations), is assumed to be related to the moment of achieving the value of the ideal shear strength for the copper crystal. Calculated values of the critical indentation depth lie within the range of experimentally observed pop-ins in the copper crystal. The related indentation load is somewhat lower than that observed in the experiment.
Keywords in Czech
Nanoindentatace; Ab initio výpočty; Smyková ideální pevnost; krystal mědi; FEM analýza
Keywords in English
Nanoindentation; Ab initio calculation; Ideal shear strength; Copper crystal; Finite element analysis
RIV year
2008
Released
01.08.2008
Publisher
PERGAMON-ELSEVIER SCIENCE
Location
USA
ISSN
0013-7944
Volume
75
Number
12
Pages from–to
3755–3762
Pages count
8
BIBTEX
@article{BUT98946,
author="Jana {Horníková} and Pavel {Šandera} and Miroslav {Černý} and Jaroslav {Pokluda},
title="Multiscale Modelling of Nanoindentation Test in Copper Crystal",
year="2008",
volume="75",
number="12",
month="August",
pages="3755--3762",
publisher="PERGAMON-ELSEVIER SCIENCE",
address="USA",
issn="0013-7944"
}