Detail publikačního výsledku

Onset of Microplasticity in Copper Crystal during Nanoindentation

HORNÍKOVÁ, J.; ČERNÝ, M.; ŠANDERA, P.; POKLUDA, J.

Originální název

Onset of Microplasticity in Copper Crystal during Nanoindentation

Anglický název

Onset of Microplasticity in Copper Crystal during Nanoindentation

Druh

Článek WoS

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.

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

Nanoindentation; Ab initio calculation; Ideal shear strength; Copper crystal; FEM analysis.

Klíčová slova v angličtině

Nanoindentation; Ab initio calculation; Ideal shear strength; Copper crystal; FEM analysis.

Autoři

HORNÍKOVÁ, J.; ČERNÝ, M.; ŠANDERA, P.; POKLUDA, J.

Vydáno

17.07.2007

Nakladatel

TRANS TECH PUBLICATIONS LTD

ISSN

1013-9826

Periodikum

Key Engineering Materials (print)

Svazek

348-349

Číslo

1

Stát

Švýcarská konfederace

Strany od

801

Strany do

804

Strany počet

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 (print)",
  year="2007",
  volume="348-349",
  number="1",
  pages="801--804",
  issn="1013-9826"
}