Publication detail

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

ŠIMONOVÁ, H. VYHLÍDAL, M. KUCHARCZYKOVÁ, B. BAYER, P. KERŠNER, Z. MALÍKOVÁ, L. KLUSÁK, J.

Original Title

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

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

Fine-grained concrete; Interfacial transition zone; Scanning electron microscopy; Three-point bending fracture test; Effective fracture toughness

Authors

ŠIMONOVÁ, H.; VYHLÍDAL, M.; KUCHARCZYKOVÁ, B.; BAYER, P.; KERŠNER, Z.; MALÍKOVÁ, L.; KLUSÁK, J.

Released

3. 7. 2017

Publisher

Italian Group of Fracture

Location

Italy

ISBN

1971-8993

Periodical

Frattura ed Integrita Strutturale

Number

41

State

Republic of Italy

Pages from

211

Pages to

219

Pages count

9

URL

http://www.gruppofrattura.it/pdf/rivista/numero41/numero_41_art_29.pdf

Full text in the Digital Library

http://hdl.handle.net/11012/69319

BibTex

@article{BUT137641,
  author="Hana {Šimonová} and Michal {Vyhlídal} and Barbara {Kucharczyková} and Patrik {Bayer} and Zbyněk {Keršner} and Lucie {Malíková} and Jan {Klusák}",
  title="Modelling of interfacial transition zone effect on resistance to crack propagation in fine-grained cement-based composites",
  journal="Frattura ed Integrita Strutturale",
  year="2017",
  number="41",
  pages="211--219",
  doi="10.3221/IGF-ESIS.41.29",
  issn="1971-8993",
  url="http://www.gruppofrattura.it/pdf/rivista/numero41/numero_41_art_29.pdf"
}