Publication result detail

The theoretical strength of fcc crystals under multiaxial loading

ČERNÝ, M.; POKLUDA, J.

Original Title

The theoretical strength of fcc crystals under multiaxial loading

English Title

The theoretical strength of fcc crystals under multiaxial loading

Type

WoS Article

Original Abstract

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.

English abstract

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.

Keywords

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

Key words in English

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

Authors

ČERNÝ, M.; POKLUDA, J.

RIV year

2012

Released

29.03.2011

ISBN

0927-0256

Periodical

COMPUTATIONAL MATERIALS SCIENCE

Volume

50

Number

3

State

Kingdom of the Netherlands

Pages from

2257

Pages to

2261

Pages count

5

Full text in the Digital Library

http://hdl.handle.net/

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"
}