Engineering Mechanics

Proceedings Vol. 11 (2005)

ENGINEERING MECHANICS 2005

Copyright © 2005 Institute of Mechanics of Solids, Faculty of Mechanical Engineering, Bruno University of Technology, Brno

 

Keršner Z., Frantík P., Řoutil L. Veselý V.
pages 151 - +7p., full text

Three point bending test of central notched specimen is used for determination of fracture properties of concrete, mortar and hardened cement paste. The properties – e.g. effective fracture toughness and effective crack length, fracture energy and also modulus of elasticity – are calculated on the base of load-deflection (l-d) diagrams from mentioned test. An approximation of model of recorded l-d diagram is possible to use for estimation of these properties, which can serve as input values for numerical modelling of fracture. The model – bending fracture model – of l-d diagrams obtained from experiments is introduced in this paper.

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