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VESELÝ, V. FRANTÍK, P.
Original Title
An application for the fracture characterisation of quasi-brittle materials taking into account fracture process zone influence
Type
journal article in Web of Science
Language
English
Original Abstract
The paper introduces a Java application programmed for the advanced determination of the fracture characteristics of silicate-based materials failing in a quasi-brittle manner. The tool reconstructs the progress of a quasi-brittle fracture from the measured load-displacement curve and the knowledge of basic mechanical properties of the material. The main contribution of the proposed approach is that it takes the characteristics of the Fracture Process Zone (FPZ, particularly its extent, i.e. its size and shape) evolving at the tip of the propagating crack during the failure process into account and incorporates them into the fracture-mechanical parameter evaluation procedure(s). This approach is expected to substantially diminish the influence of the test specimen's size/shape and the test geometry on the values of the parameters of nonlinear fracture models determined from the records of fracture tests on laboratory specimens. The application implements a developed technique for estimation of the size and shape of the FPZ. The technique is based on an amalgamation of several modelling concepts dealing with the failure of structural materials, i.e. multi-parameter linear elastic fracture mechanics, classical nonlinear fracture models for concrete (equivalent elastic crack and cohesive crack models), and the plasticity approach. The knowledge of the FPZ's extent is employed for the relation of a part of the entire work of fracture to its characteristics within the presented approach. The verification and validation of the developed technique is performed via numerical simulations using the authors' own computational code based on physical discretization of continuum and selected sets of experimental evidence published in the literature. Reasonable agreement is observed between the outputs of the presented semi-analytical technique and both the simulation results and the experimental data.
Keywords
Quasi-brittle fracture, fracture process zone, energy dissipation, work of fracture, fracture energy, effective crack, cohesive crack model, crack-tip plasticity, Java application
Authors
VESELÝ, V.; FRANTÍK, P.
RIV year
2014
Released
1. 6. 2014
ISBN
0965-9978
Periodical
ADVANCES IN ENGINEERING SOFTWARE
Year of study
Number
72
State
United Kingdom of Great Britain and Northern Ireland
Pages from
66
Pages to
76
Pages count
11
BibTex
@article{BUT105889, author="Václav {Veselý} and Petr {Frantík}", title="An application for the fracture characterisation of quasi-brittle materials taking into account fracture process zone influence", journal="ADVANCES IN ENGINEERING SOFTWARE", year="2014", volume="2014", number="72", pages="66--76", doi="10.1016/j.advengsoft.2013.06.004", issn="0965-9978" }