Basic features of aggregate-matrix-interface fracture of concrete: pilot modelling

0481505 - ÚFM 2018 RIV GB eng C - Konferenční příspěvek (zahraniční konf.)
Vyhlídal, M. - Šimonová, H. - Veselý, V. - Keršner, Z. - Klusák, Jan - Malíková, Lucie
Basic features of aggregate-matrix-interface fracture of concrete: pilot modelling.
Advances and Trends in Engineering Sciences and Technologies II. London: CRC Press, 2017 - (Al Ali, M.; Platko, P.), s. 309-314. ISBN 978-131539382-7.
[ESaT 2016 International Conference on Engineering Sciences and Technologies /2./. Vysoké Tatry (SK), 29.06.2016-01.07.2016]
Grant CEP: GA ČR(CZ) GA16-18702S
Institucionální podpora: RVO:68081723
Klíčová slova: Fracture behaviour * Interfacial transition zone * Matrix interfaces * Toughening mechanisms * Concrete * Fracture mechanics
Obor OECD: Audio engineering, reliability analysis

In this paper, the attention is paid to investigation of the importance of the Interfacial Transition Zone (ITZ) in concrete for the global fracture behaviour. A simplified cracked geometry (consisting matrix, ITZ and aggregate) is modelled by means of the finite element method with a crack terminating at the matrix-ITZ interface. Numerical studies assuming two various ITZ thicknesses and several various ITZ elastic moduli are performed. Based on the values of the opening stress ahead of the crack tip (its average value and stress range) a few conclusions are discussed. The pilot analyses dealing with the effect of ITZ on the stress distribution should contribute to better description of toughening mechanisms in silicate-based composites.
Trvalý link: http://hdl.handle.net/11104/0277303