Shear instabilities in perfect bcc crystals during simulated tensile tests

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F13%3APU101939" target="_blank" >RIV/00216305:26210/13:PU101939 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081723:_____/13:00421359 RIV/00216224:14740/13:00070181

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevB.87.014117" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.87.014117</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.87.014117" target="_blank" >10.1103/PhysRevB.87.014117</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Shear instabilities in perfect bcc crystals during simulated tensile tests

Popis výsledku v původním jazyce

This work demonstrates a simple but efficient way how to determine the existence of shear instabilities in ideal bcc crystals under uniaxial loading. The theoretical tensile strengths are derived from calculated values of the theoretical shear strength and their dependence on the superimposed normal stress. The presented procedure enables us to avoid complicated and time-consuming analyses of elastic stability of crystals. Results of first-principles simulations of coupled shear and tensile deformationsfor two most frequent slip systems ({110}<111> and {112}<111>) in six ideal cubic crystals are used to evaluate the uniaxial tensile strengths in three low-index crystallographic directions (<100>, <110>, and <111>) by assuming a shear instability in the weakest shear system. While instabilities occurring under <100> tension are mostly related to the shear in {112} plane, those occurring during loading in the other two directions are associated with {110} planes. The results are consist

Název v anglickém jazyce

Shear instabilities in perfect bcc crystals during simulated tensile tests

Popis výsledku anglicky

This work demonstrates a simple but efficient way how to determine the existence of shear instabilities in ideal bcc crystals under uniaxial loading. The theoretical tensile strengths are derived from calculated values of the theoretical shear strength and their dependence on the superimposed normal stress. The presented procedure enables us to avoid complicated and time-consuming analyses of elastic stability of crystals. Results of first-principles simulations of coupled shear and tensile deformationsfor two most frequent slip systems ({110}<111> and {112}<111>) in six ideal cubic crystals are used to evaluate the uniaxial tensile strengths in three low-index crystallographic directions (<100>, <110>, and <111>) by assuming a shear instability in the weakest shear system. While instabilities occurring under <100> tension are mostly related to the shear in {112} plane, those occurring during loading in the other two directions are associated with {110} planes. The results are consist

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

PHYSICAL REVIEW B

ISSN

1098-0121

e-ISSN

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Svazek periodika

87

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

4

Strana od-do

014117-014117

Kód UT WoS článku

000314223600001

EID výsledku v databázi Scopus

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