Počet záznamů: 1
Fracture-mechanics behaviour of ceramic foam with macroscopic stress concentrator upon the tensile test
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SYSNO ASEP 0481389 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Fracture-mechanics behaviour of ceramic foam with macroscopic stress concentrator upon the tensile test Tvůrce(i) Ševeček, O. (CZ)
Majer, Z. (CZ)
Bertolla, Luca (UFM-A) ORCID
Chlup, Zdeněk (UFM-A) RID, ORCID
Kotoul, M. (CZ)Celkový počet autorů 5 Zdroj.dok. Advances in Fracture and Damage Mechanics XVI. - Zurich : Trans Tech Publications Ltd, 2017 / Mariano P. M. ; Baragetti S. ; Casavola K. ; Pappalettere C. ; Aliabadi F. M. H. - ISSN 1662-9795 - ISBN 978-3-0357-1168-4 Rozsah stran s. 99-102 Poč.str. 4 s. Forma vydání Tištěná - P Akce FDM 2017 International Conference on Fracture and Damage Mechanics /16./ Datum konání 18.07.2017 - 20.07.2017 Místo konání Florence Země IT - Itálie Typ akce WRD Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova Fracture-mechanics ; ceramic foam ; tensile test Vědní obor RIV JL - Únava materiálu a lomová mechanika Obor OECD Audio engineering, reliability analysis Institucionální podpora UFM-A - RVO:68081723 EID SCOPUS 85029908833 DOI 10.4028/www.scientific.net/KEM.754.99 Anotace The work investigates an influence of the macroscopic stress concentrator inside the ceramic open cell foam structure on the fracture-mechanics response of the foam upon the tensile test. As the concentrator, the central crack/rectangular notch was taken into account. The influence of the crack/notch length and width on the stress concentration ahead the concentrator tip was assessed using the simplified FE beam element based model with irregular cells simulating the real ceramic foam structure. Average principal stresses calculated on set of struts ahead the crack/notch tip were compared with average stresses in the intact structure. It was found that the ratio of these stresses increases linearly with the crack length. The stress concentration ratio is slightly lower in case of thick rectangular notch than in case of a thin crack. Furthermore, the failure load leading to complete fracture of the studied specimens, subjected to the tensile loading, were calculated using the same model. It is shown that the difference factor between the critical fracture force in case of structure without concentrator and with concentrator is very close to the concentration factor calculated from the average stresses on particular struts in the region in front of the concentrator tip.
Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2018
Počet záznamů: 1