About: Shear instabilities in perfect bcc crystals during simulated tensile tests

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Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://www.dpg-verhandlungen.de/year/2013/conference/regensburg/parts?lang=en
Description	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 deformations for two most frequent slip systems (\mbox{\textbraceleft}110\mbox{\textbraceright}$\langle 111\rangle$ and \mbox{\textbraceleft}112\mbox{\textbraceright}$\langle 111\rangle$) in six ideal cubic crystals are used to evaluate the uniaxial tensile strengths in three low-index crystallographic directions ($\langle 100\rangle$, $\langle 110\rangle$, and $\langle 111\rangle$) by assuming a shear instability in the weakest shear system. While instabilities occurring under $\langle 100\rangle$ tension are mos 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 deformations for two most frequent slip systems (\mbox{\textbraceleft}110\mbox{\textbraceright}$\langle 111\rangle$ and \mbox{\textbraceleft}112\mbox{\textbraceright}$\langle 111\rangle$) in six ideal cubic crystals are used to evaluate the uniaxial tensile strengths in three low-index crystallographic directions ($\langle 100\rangle$, $\langle 110\rangle$, and $\langle 111\rangle$) by assuming a shear instability in the weakest shear system. While instabilities occurring under $\langle 100\rangle$ tension are mos (en)
Title	Shear instabilities in perfect bcc crystals during simulated tensile tests Shear instabilities in perfect bcc crystals during simulated tensile tests (en)
skos:prefLabel	Shear instabilities in perfect bcc crystals during simulated tensile tests Shear instabilities in perfect bcc crystals during simulated tensile tests (en)
skos:notation	RIV/00216305:26620/13:PU106141!RIV14-MSM-26620___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(ED1.1.00/02.0068)
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Šesták, Petr Černý, Miroslav Pokluda, Jaroslav
http://linked.open.../riv/druhVysledku	O - Ostatní výsledky nezařaditelné do žádného z výše uvedených druhů výsledku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoké učení technické v Brně / Středoevropský technologický institut
http://linked.open...dnocenehoVysledku	104936
http://linked.open...ai/riv/idVysledku	RIV/00216305:26620/13:PU106141
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	bcc metals, ab initio, shear (en)
http://linked.open.../riv/klicoveSlovo	ab initio shear bcc metals
http://linked.open...ontrolniKodProRIV	[3A32E3607FBE]
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Central european institute of technology
http://linked.open...UplatneniVysledku	2013
http://linked.open...iv/tvurceVysledku	Pokluda, Jaroslav Černý, Miroslav Šob, Mojmír Šesták, Petr
http://localhost/t...ganizacniJednotka	26620

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