Vliv velikosti vzorku na lomovou energii způsobený nelokalitou

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F04%3A01102087" target="_blank" >RIV/68407700:21110/04:01102087 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Size Effect on Fracture Energy Induced by Non-locality

Popis výsledku v původním jazyce

Experimental results available in the literature indicate that the nominal fracture energy of concrete (defined as total work of fracture divided by the ligament area) depends on the size of the specimen. Theoretical modeling of the size effect on nominal fracture energy based on a nonlocal constitutive model is attempted in this paper. The influence of various details of the integral-type nonlocal formulation, e.g., of the specific form of nonlocal averaging in the vicinity of a physical boundary, is studied and a physical explanation is provided. The numerical results are compared to experimental data for notched compact tension specimens, and conclusions are drawn for individual formulations. It is shown that the best agreement with experimentally observed trends is achieved if the notch is modeled as a layer of completely damaged material. Fitting of the size effects on both strength and fracture energy permits a unique identification of the model parameters.

Název v anglickém jazyce

Size Effect on Fracture Energy Induced by Non-locality

Popis výsledku anglicky

Experimental results available in the literature indicate that the nominal fracture energy of concrete (defined as total work of fracture divided by the ligament area) depends on the size of the specimen. Theoretical modeling of the size effect on nominal fracture energy based on a nonlocal constitutive model is attempted in this paper. The influence of various details of the integral-type nonlocal formulation, e.g., of the specific form of nonlocal averaging in the vicinity of a physical boundary, is studied and a physical explanation is provided. The numerical results are compared to experimental data for notched compact tension specimens, and conclusions are drawn for individual formulations. It is shown that the best agreement with experimentally observed trends is achieved if the notch is modeled as a layer of completely damaged material. Fitting of the size effects on both strength and fracture energy permits a unique identification of the model parameters.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2004

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

International Journal for Numerical and Analytical Methods in Geomechanics

ISSN

0363-9061

e-ISSN

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Svazek periodika

28

Číslo periodika v rámci svazku

7-8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

18

Strana od-do

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Kód UT WoS článku

000222532300006

EID výsledku v databázi Scopus

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