Detail publikace
Vliv superponovaného normálového napětí na <112>{111} smykovou pevnost dokonalých krystalů fcc kovů
ČERNÝ, M. POKLUDA, J.
Český název
Vliv superponovaného normálového napětí na <112>{111} smykovou pevnost dokonalých krystalů fcc kovů
Anglický název
Influence of superimposed normal stress on the <112>{111} shear strength in perfect fcc metals
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
The influence of a stress applied perpendicularly to slip planes during the shear deformation of fcc crystals on the theoretical shear strength was studied for <112>{111} slip system using first principles methods. A special relaxation procedure guarantees that all stresses acting on the system are zero with the exception of the normal stress and the resolved shear stress. The theoretical shear strength was found to be a decreasing function of the applied tensile normal stress. The results were compared with similar calculations for rigid atomic planes and the role of relaxation of atomic positions within the planes was found to be important for correct description of the studied deformation process.
Český abstrakt
The influence of a stress applied perpendicularly to slip planes during the shear deformation of fcc crystals on the theoretical shear strength was studied for <112>{111} slip system using first principles methods. A special relaxation procedure guarantees that all stresses acting on the system are zero with the exception of the normal stress and the resolved shear stress. The theoretical shear strength was found to be a decreasing function of the applied tensile normal stress. The results were compared with similar calculations for rigid atomic planes and the role of relaxation of atomic positions within the planes was found to be important for correct description of the studied deformation process.
Anglický abstrakt
The influence of a stress applied perpendicularly to slip planes during the shear deformation of fcc crystals on the theoretical shear strength was studied for <112>{111} slip system using first principles methods. A special relaxation procedure guarantees that all stresses acting on the system are zero with the exception of the normal stress and the resolved shear stress. The theoretical shear strength was found to be a decreasing function of the applied tensile normal stress. The results were compared with similar calculations for rigid atomic planes and the role of relaxation of atomic positions within the planes was found to be important for correct description of the studied deformation process.
Klíčová slova česky
teoretická smyková pevnost, homogenní deformace, ab initio výpočty
Klíčová slova anglicky
ideal shear strength, homogeneous deformation, ab initio calculations
Rok RIV
2008
Vydáno
01.01.2008
ISSN
0927-0256
Časopis
COMPUTATIONAL MATERIALS SCIENCE
Ročník
44
Číslo
10
Strany od–do
127–130
Počet stran
4
BIBTEX
@article{BUT44480,
author="Miroslav {Černý} and Jaroslav {Pokluda},
title="Influence of superimposed normal stress on the <112>{111} shear strength in perfect fcc metals",
journal="COMPUTATIONAL MATERIALS SCIENCE",
year="2008",
volume="44",
number="10",
month="January",
pages="127--130",
issn="0927-0256"
}