Detail publikace
Onset of Microplasticity in Copper Crystal during Nanoindentation
HORNÍKOVÁ, J. ČERNÝ, M. ŠANDERA, P. POKLUDA, J.
Český název
Onset of Microplasticity in Copper Crystal during Nanoindentation
Anglický název
Onset of Microplasticity in Copper Crystal during Nanoindentation
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
The nanoindentation test in the dislocation free crystal of copper is simulated by finite element calculations coupled with ab initio calculation of ideal shear strength. 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. This value also depends on the normal stress in the critical shear system in an approximately linear way, as follows from recently published first principle calculations. The calculated values of the critical shear stress (related to the ideal shear strength) lie exactly at the lower limit of the range of experimentally observed pop-ins in the copper crystal.
Český abstrakt
The nanoindentation test in the dislocation free crystal of copper is simulated by finite element calculations coupled with ab initio calculation of ideal shear strength. 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. This value also depends on the normal stress in the critical shear system in an approximately linear way, as follows from recently published first principle calculations. The calculated values of the critical shear stress (related to the ideal shear strength) lie exactly at the lower limit of the range of experimentally observed pop-ins in the copper crystal.
Anglický abstrakt
The nanoindentation test in the dislocation free crystal of copper is simulated by finite element calculations coupled with ab initio calculation of ideal shear strength. 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. This value also depends on the normal stress in the critical shear system in an approximately linear way, as follows from recently published first principle calculations. The calculated values of the critical shear stress (related to the ideal shear strength) lie exactly at the lower limit of the range of experimentally observed pop-ins in the copper crystal.
Klíčová slova česky
Nanoindentation; Ab initio calculation; Ideal shear strength; Copper crystal; FEM analysis.
Klíčová slova anglicky
Nanoindentation; Ab initio calculation; Ideal shear strength; Copper crystal; FEM analysis.
Rok RIV
2007
Vydáno
17.07.2007
Nakladatel
TRANS TECH PUBLICATIONS LTD
ISSN
1013-9826
Časopis
Key Engineering Materials
Ročník
348-349
Číslo
1
Strany od–do
801–804
Počet stran
4
BIBTEX
@article{BUT44099,
author="Jana {Horníková} and Miroslav {Černý} and Pavel {Šandera} and Jaroslav {Pokluda},
title="Onset of Microplasticity in Copper Crystal during Nanoindentation",
journal="Key Engineering Materials",
year="2007",
volume="348-349",
number="1",
month="July",
pages="801--804",
publisher="TRANS TECH PUBLICATIONS LTD",
issn="1013-9826"
}