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

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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 ({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 consistent with those p 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 ({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 consistent with those p (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/00216305:26210/13:PU101939!RIV14-GA0-26210___
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(ED1.1.00/02.0068), P(GAP108/10/0698), P(GAP108/12/0144), P(GAP108/12/0311), P(LD12037)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Černý, Miroslav Pokluda, Jaroslav
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
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 / Fakulta strojního inženýrství
http://linked.open...dnocenehoVysledku	104935
http://linked.open...ai/riv/idVysledku	RIV/00216305:26210/13:PU101939
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	theoretical strength, uniaxial loading, shear instabilities, bcc crystals, ab initio calculations (en)
http://linked.open.../riv/klicoveSlovo	uniaxial loading bcc crystals shear instabilities ab initio calculations theoretical strength
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[FB90BDCEFEF7]
http://linked.open...i/riv/nazevZdroje	PHYSICAL REVIEW B
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Ab initio study of bimetallic magnetic clusters and nanowires Central european institute of technology Strength, embrittlement and magnetism of clean and impurity-segregated grain boundaries in metallic materials New Approaches to Investigation of Fatigue Crack Propagation in Modes II, III and II+III Relationship between grain boundary chemistry and fracture characteristics of bcc iron alloys
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	87
http://linked.open...iv/tvurceVysledku	Pokluda, Jaroslav Černý, Miroslav Šob, Mojmír Šesták, Petr
http://linked.open...ain/vavai/riv/wos	000314223600001
issn	1098-0121
number of pages	4 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevB.87.014117
http://localhost/t...ganizacniJednotka	26210

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