A Crack Approaching the Edge of the Aggregate
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F20%3APU138567" target="_blank" >RIV/00216305:26110/20:PU138567 - isvavai.cz</a>
Výsledek na webu
<a href="http://tces.vsb.cz/Home/ArticleDetail/509" target="_blank" >http://tces.vsb.cz/Home/ArticleDetail/509</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.35181/tces-2020-0017" target="_blank" >10.35181/tces-2020-0017</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
A Crack Approaching the Edge of the Aggregate
Popis výsledku v původním jazyce
In this work, the influence of a crack approaching the edge of the amphibolite inclusion on fracture behaviour of cement composite is investigated. Specimens of the nominal dimensions 40 × 40 × 160 mm with polygonal amphibolite inclusion of 8 × 8 × 40 mm were provided with an initial central edge notch with a depth 12 mm, which was made by diamond blade saw. To determine the influence of polygonal cavity on fracture behaviour, fracture tests were conducted via three-point bending. The aim of this work is to analyse the behaviour of such specimen by means of finite element method (FEM) principles in Ansys, Inc. software. For this reason, a simplified 2D model was created for plane strain conditions. The crack propagation assessment was based on generalized fracture mechanics approaches using a criterion of an average value of tangential stress determined in dependence on the polar angle coordinate θ. The results of numerical analysis indicate that the debonding in the close vicinity of the bottom edge of the inclusion occurred. In other words, imperfect compaction of the fresh mixture and a smooth surface of the aggregate leaded to the formation of poor interface with lower mechanical-fracture parameters. Further, cutting of the initial notch by a diamond saw blade results in a precrack length greater than expected.
Název v anglickém jazyce
A Crack Approaching the Edge of the Aggregate
Popis výsledku anglicky
In this work, the influence of a crack approaching the edge of the amphibolite inclusion on fracture behaviour of cement composite is investigated. Specimens of the nominal dimensions 40 × 40 × 160 mm with polygonal amphibolite inclusion of 8 × 8 × 40 mm were provided with an initial central edge notch with a depth 12 mm, which was made by diamond blade saw. To determine the influence of polygonal cavity on fracture behaviour, fracture tests were conducted via three-point bending. The aim of this work is to analyse the behaviour of such specimen by means of finite element method (FEM) principles in Ansys, Inc. software. For this reason, a simplified 2D model was created for plane strain conditions. The crack propagation assessment was based on generalized fracture mechanics approaches using a criterion of an average value of tangential stress determined in dependence on the polar angle coordinate θ. The results of numerical analysis indicate that the debonding in the close vicinity of the bottom edge of the inclusion occurred. In other words, imperfect compaction of the fresh mixture and a smooth surface of the aggregate leaded to the formation of poor interface with lower mechanical-fracture parameters. Further, cutting of the initial notch by a diamond saw blade results in a precrack length greater than expected.
Klasifikace
Druh
J<sub>ost</sub> - Ostatní články v recenzovaných periodicích
CEP obor
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OECD FORD obor
20102 - Construction engineering, Municipal and structural engineering
Návaznosti výsledku
Projekt
—
Návaznosti
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2020
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Transactions of the VŠB – Technical University of Ostrava, Civil Engineering Series
ISSN
1804-4824
e-ISSN
—
Svazek periodika
20
Číslo periodika v rámci svazku
2
Stát vydavatele periodika
CZ - Česká republika
Počet stran výsledku
6
Strana od-do
47-52
Kód UT WoS článku
—
EID výsledku v databázi Scopus
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