Stability and strength of covalent crystals under uniaxial and triaxial loading from first principles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F13%3APU100855" target="_blank" >RIV/00216305:26620/13:PU100855 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/0953-8984/25/3/035401" target="_blank" >http://dx.doi.org/10.1088/0953-8984/25/3/035401</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0953-8984/25/3/035401" target="_blank" >10.1088/0953-8984/25/3/035401</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stability and strength of covalent crystals under uniaxial and triaxial loading from first principles

Popis výsledku v původním jazyce

Response of three covalent crystals with a diamond lattice (C, Si and Ge) to uniaxial and a special triaxial (generally nonhydrostatic) loading is calculated from first principles. The lattice deformations are described in terms of variations of bond lengths and angles. The triaxial stress state is simulated as a superposition of axial tension or compression and transverse (both tensile and compressive) biaxial stresses. The biaxial stresses are considered to be adjustable parameters and the theoreticalstrengths in tension and compression along <100>, <110>, <111> crystallographic directions are calculated as their functions. The obtained results revealed that the compressive strengths are, consistently to fcc metals, almost linear functions of the transverse stresses. Tensile transverse stresses lower the compressive strength and vice versa. The tensile strengths, however, are not monotonic functions of the transverse biaxial stresses since they mostly exhibit maxima for certain valu

Název v anglickém jazyce

Stability and strength of covalent crystals under uniaxial and triaxial loading from first principles

Popis výsledku anglicky

Response of three covalent crystals with a diamond lattice (C, Si and Ge) to uniaxial and a special triaxial (generally nonhydrostatic) loading is calculated from first principles. The lattice deformations are described in terms of variations of bond lengths and angles. The triaxial stress state is simulated as a superposition of axial tension or compression and transverse (both tensile and compressive) biaxial stresses. The biaxial stresses are considered to be adjustable parameters and the theoreticalstrengths in tension and compression along <100>, <110>, <111> crystallographic directions are calculated as their functions. The obtained results revealed that the compressive strengths are, consistently to fcc metals, almost linear functions of the transverse stresses. Tensile transverse stresses lower the compressive strength and vice versa. The tensile strengths, however, are not monotonic functions of the transverse biaxial stresses since they mostly exhibit maxima for certain valu

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Journal of Physics: Condensed Matter

ISSN

0953-8984

e-ISSN

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Svazek periodika

25

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

035401-035401

Kód UT WoS článku

000313100500007

EID výsledku v databázi Scopus

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