Modelling of interfacial transition zone effect on resistance to crack propagation in fine-grained cement-based composites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F17%3A00481493" target="_blank" >RIV/68081723:_____/17:00481493 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26110/17:PU124025

Výsledek na webu

<a href="http://dx.doi.org/10.3221/IGF-ESIS.41.29" target="_blank" >http://dx.doi.org/10.3221/IGF-ESIS.41.29</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3221/IGF-ESIS.41.29" target="_blank" >10.3221/IGF-ESIS.41.29</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modelling of interfacial transition zone effect on resistance to crack propagation in fine-grained cement-based composites

Popis výsledku v původním jazyce

In this paper, the attention is paid to investigation of the importance of the interfacial transition zone (ITZ) in selected fine-grained cement-based composites for the global fracture behaviour. This is a region of cement paste around the aggregate particles which specific features could have significant impact on the final behaviour of cement composites with a crack tip nearby this interface under applied tension. The aim of this work is to show the basic interface microstructure by scanning electron microscopy (SEM) done by MIRA3 TESCAN and to analyse the behaviour of such composite by numerical modelling. Numerical studies assume two different ITZ thicknesses taken from SEM analysis. A simplified cracked geometry (consisting of three phases – matrix, ITZ, and aggregate) is modelled by means of the finite element method with a crack terminating at the matrix–ITZ interface. ITZ's modulus of elasticity is taken from generalized self-consistent scheme. A few conclusions are discussed based on comparison of the average values of the opening stress ahead of the crack tip with their critical values. The analyses dealing with the effect of ITZ's properties on the stress distribution should contribute to better description of toughening mechanisms in silicate-based composites

Název v anglickém jazyce

Modelling of interfacial transition zone effect on resistance to crack propagation in fine-grained cement-based composites

Popis výsledku anglicky

In this paper, the attention is paid to investigation of the importance of the interfacial transition zone (ITZ) in selected fine-grained cement-based composites for the global fracture behaviour. This is a region of cement paste around the aggregate particles which specific features could have significant impact on the final behaviour of cement composites with a crack tip nearby this interface under applied tension. The aim of this work is to show the basic interface microstructure by scanning electron microscopy (SEM) done by MIRA3 TESCAN and to analyse the behaviour of such composite by numerical modelling. Numerical studies assume two different ITZ thicknesses taken from SEM analysis. A simplified cracked geometry (consisting of three phases – matrix, ITZ, and aggregate) is modelled by means of the finite element method with a crack terminating at the matrix–ITZ interface. ITZ's modulus of elasticity is taken from generalized self-consistent scheme. A few conclusions are discussed based on comparison of the average values of the opening stress ahead of the crack tip with their critical values. The analyses dealing with the effect of ITZ's properties on the stress distribution should contribute to better description of toughening mechanisms in silicate-based composites

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20306 - Audio engineering, reliability analysis

Projekt

<a href="/cs/project/GA16-18702S" target="_blank" >GA16-18702S: Problematika porušování v blízkosti rozhraní plniva a matrice kompozitů na silikátové bázi (AMIRI)</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Frattura ed Integrita Strutturale

ISSN

1971-8993

e-ISSN

—

Svazek periodika

11

Číslo periodika v rámci svazku

41

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

9

Strana od-do

211-219

Kód UT WoS článku

000423951800029

EID výsledku v databázi Scopus

2-s2.0-85022083357