Detail publikace

The theoretical strength of fcc crystals under multiaxial loading

ČERNÝ, M. POKLUDA, J.

Anglický název

The theoretical strength of fcc crystals under multiaxial loading

Typ

Článek WoS

Jazyk

en

Originální abstrakt

Atomistic modeling of a special triaxial loading of six perfect fcc crystals is performed by means of pseudopotential density functional method. The triaxial stress state is simulated as a superposition of axial pressure and transverse biaxial stresses. The transverse stresses are treated as adjustable parameters and their influence on the theoretical compressive strength is evaluated for the <100> and the <111> crystallographic orientations of the loading axis. The obtained results revealed that the compressive strengths are increasing linear functions of the transverse compressive stresses. On the other hand, the tensile transverse stresses lower the compressive strength. This implies that the compressive strengths of individual crystals approach a zero value when some critical (characteristic) levels of tensile biaxial stresses are reached. These stresses are then considered to be the theoretical tensile biaxial strengths.

Klíčová slova anglicky

ideal compressive strength, stress superposition, fcc metals, ab initio calculations

Vydáno

2011-03-29

ISSN

0927-0256

Časopis

COMPUTATIONAL MATERIALS SCIENCE

Ročník

50

Číslo

3

Strany od–do

2257–2261

Počet stran

5

BIBTEX


@article{BUT50791,
  author="Miroslav {Černý} and Jaroslav {Pokluda}",
  title="The theoretical strength of fcc crystals under multiaxial loading",
  journal="COMPUTATIONAL MATERIALS SCIENCE",
  year="2011",
  volume="50",
  number="3",
  pages="2257--2261",
  issn="0927-0256"
}