Statistically based continuum model of dislocation cell structure formation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985556%3A_____%2F07%3A00080955" target="_blank" >RIV/67985556:_____/07:00080955 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Statistically based continuum model of dislocation cell structure formation

Original language description

Within the framework of continuum mechanics, the formation of misoriented dislocation cells can be explained as a result of a trend to reduce the energetically costly hardening in multi slip by decreasing locally the number of active slip systems. In thestandard (local) approach, the continuum theory predicts an infinitesimally small cell size. The finite size of real cells is controlled by short-range dislocation interactions: (i) the self-force of the curved dislocations, (ii) the short-range correlation among dislocations. Within the proposed framework the cell size is a result of a compromise: bulk strain and dissipative energy tends to decrease the size, while short-range interactions restrict that tendency. In the present paper the non-local effects are analyzed using a model of an infinite crystal deformed by symmetric double slip, where plastic strain is carried by straight, parallel, edge dislocations. The constitutive equations of the model are derived from the statistical..

Czech name

Spojity model formovani diclokacni struktury zalozeny na statistice

Czech description

V rámci mechaniky kontinua se dá vznik dislokačních buněk vysvětlit jako snaha obejít energeticky náročné zpevnění v multiskluzu pomocí redukce aktivních skluzových systemů. Članek analyzuje nelokální interakce, které se podílejí na vzniku dislokací. Kostitutivní rovnice byly odvozeny ze statistické mechaniky.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

<a href="/en/project/IAA1075402" target="_blank" >IAA1075402: Variational analysis in nonsmooth problems of mathematical physics</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2007

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review. B

ISSN

1098-0121

e-ISSN

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Volume of the periodical

75

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

14

Pages from-to

1-14

UT code for WoS article

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EID of the result in the Scopus database

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