Issue 39

S. Seitl et alii, Frattura ed Integrità Strutturale, 39 (2017) 100-109; DOI: 10.3221/IGF-ESIS.39.11 100 Focussed on Modelling in Mechanics Numerical study and pilot evaluation of experimental data measured on specimen loaded by bending and wedge splitting forces S. Seitl Academy of Sciences of the Czech Republic, v. v. i., Institute of Physics of Materials, Brno, Czech Republic Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Brno, Czech Republic seitl@ipm.cz, http://orcid.org/0000-0002-4953-4324 R. Diego Liedo Academy of Sciences of the Czech Republic, v. v. i., Institute of Physics of Materials, Brno, Czech Republic University of Oviedo, Department of Construction and Manufacturing Engineering, Campus de Viesques, Gijón, Spain uo212533@uniovi.es A BSTRACT . The fracture mechanical properties of silicate based materials are determined from various fracture mechanicals tests, e.g. three- or four- point bending test, wedge splitting test, modified compact tension test etc. For evaluation of the parameters, knowledge about the calibration and compliance functions is required. Therefore, in this paper, the compliance and calibration curves for a novel test geometry based on combination of the wedge splitting test and three-point bending test are introduced. These selected variants exhibit significantly various stress state conditions at the crack tip, or, more generally, in the whole specimen ligament. The calibration and compliance curves are compared and used for evaluation of the data from pilot experimental measurement. K EYWORDS . Numerical simulation; Stress intensity factor; T-stress; Concrete; Finite element method; Wedge splitting test; Three–point bending test. Citation: Seitl, S., Liedo, R. D., Numerical study and pilot evaluation of experimental data measured on specimen loaded by bending and wedge splitting forces, Frattura ed Integrità Strutturale, 39 (2017) 100-109. Received: 25.07.2016 Accepted: 22.09.2016 Published: 01.01.2017 Copyright: © 2017 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. I NTRODUCTION or evaluation of fracture mechanical properties of materials like concrete, standardized methodology is not published yet. There is only recommendation for measurement of properties by RILEM [18]. In the literature, researchers used various specimen geometries for experimental measurement of fracture properties of concrete, F