Fracture-mechanics behaviour of ceramic foam with macroscopic stress concentrator upon the tensile test
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F17%3A00481389" target="_blank" >RIV/68081723:_____/17:00481389 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/00216305:26210/17:PU124559
Výsledek na webu
<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.754.99" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/KEM.754.99</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.754.99" target="_blank" >10.4028/www.scientific.net/KEM.754.99</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Fracture-mechanics behaviour of ceramic foam with macroscopic stress concentrator upon the tensile test
Popis výsledku v původním jazyce
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.n
Název v anglickém jazyce
Fracture-mechanics behaviour of ceramic foam with macroscopic stress concentrator upon the tensile test
Popis výsledku anglicky
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.n
Klasifikace
Druh
D - Stať ve sborníku
CEP obor
—
OECD FORD obor
20306 - Audio engineering, reliability analysis
Návaznosti výsledku
Projekt
<a href="/cs/project/GJ17-08447Y" target="_blank" >GJ17-08447Y: Výpočtové modelování porušování vysoce porézních keramických materiálů s reálnými výrobními defekty</a><br>
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2017
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název statě ve sborníku
Advances in Fracture and Damage Mechanics XVI
ISBN
978-3-0357-1168-4
ISSN
1662-9795
e-ISSN
—
Počet stran výsledku
4
Strana od-do
99-102
Název nakladatele
Trans Tech Publications Ltd
Místo vydání
Zurich
Místo konání akce
Florence
Datum konání akce
18. 7. 2017
Typ akce podle státní příslušnosti
WRD - Celosvětová akce
Kód UT WoS článku
—