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ČERNÝ, M. POKLUDA, J.
Original Title
The theoretical strength of fcc crystals under multiaxial loading
Type
journal article in Web of Science
Language
English
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.
Keywords
ideal compressive strength, stress superposition, fcc metals, ab initio calculations
Authors
ČERNÝ, M.; POKLUDA, J.
RIV year
2011
Released
29. 3. 2011
ISBN
0927-0256
Periodical
COMPUTATIONAL MATERIALS SCIENCE
Year of study
50
Number
3
State
Kingdom of the Netherlands
Pages from
2257
Pages to
2261
Pages count
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" }