Počet záznamů: 1
Ab initio aided strain gradient elasticity theory in prediction of nanocomponent fracture
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SYSNO ASEP 0509680 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Ab initio aided strain gradient elasticity theory in prediction of nanocomponent fracture Tvůrce(i) Kotoul, M. (CZ)
Skalka, P. (CZ)
Profant, T. (CZ)
Friák, Martin (UFM-A) RID, ORCID
Řehák, P. (CZ)
Šesták, P. (CZ)
Černý, M. (CZ)
Pokluda, J. (CZ)Celkový počet autorů 8 Číslo článku 103074 Zdroj.dok. Mechanics of Materials. - : Elsevier - ISSN 0167-6636
Roč. 136, SEP (2019)Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova screw dislocation ; brittle-fracture ; stress ; energy ; crystal ; crack ; transition ; dynamics ; origin ; Fracture nanomechanics ; Strain gradient elasticity ; dft ; fem ; Size dependent phenomena Vědní obor RIV BJ - Termodynamika Obor OECD Thermodynamics Způsob publikování Omezený přístup Institucionální podpora UFM-A - RVO:68081723 UT WOS 000477685800014 EID SCOPUS 85067312712 DOI 10.1016/j.mechmat.2019.103074 Anotace The aim of the paper is to address fracture problems in nanoscale-sized cracked components using a simplified form of the strain gradient elasticity theory aided by ab initio calculations. Quantification of the material length scale parameter l(1) of the simplified form of the strain gradient elasticity theory plays a key role in the analysis. The parameter l(1) is identified for silicon and tungsten single crystals using first principles calculations. Specifically, the parameter l(1) is extracted from phonon-dispersions generated by ab-initio calculations and, for comparison, by adjusting the analytical strain gradient elasticity theory solution for the displacement field near the screw dislocation with the ab-initio calculations of this field. The obtained results are further used in the strain gradient elasticity modeling of crack stability in nano-panels made of silicon and tungsten single crystals, where due to size effects and nonlocal material point interactions the classical linear fracture mechanics breaks down. The cusp-like crack tip opening profiles determined by the gradient elasticity theory and a hybrid atomistic approach at the moment of nano-panels fracture revealed a very good mutual agreement. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2020 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0167663619300341?via%3Dihub
Počet záznamů: 1