Modelling of size and shape of damage zone in quasi-brittle notched specimens – analytical approach based on fracture-mechanical evaluation of loading curves
An analysis focused on capturing the phenomenon of quasi-brittle fracture is presented. Selected parameters relevant for quasi-brittle fracture are evaluated and an assessment of their dependence on the size and shape of the test specimen is studied. Determination of these fracture characteristics i...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2017-01-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero39/numero_39_art_3.pdf |
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| author | J. Klon V. Veselý |
| author_facet | J. Klon V. Veselý |
| author_sort | J. Klon |
| collection | DOAJ |
| description | An analysis focused on capturing the phenomenon of quasi-brittle fracture is presented. Selected parameters relevant for quasi-brittle fracture are evaluated and an assessment of their dependence on the size and shape of the test specimen is studied. Determination of these fracture characteristics is based on the records of the fracture tests on notched specimens, particularly from recorded loading diagrams. A method of separation of the energy amounts released for the propagation of the (effective) crack and that dissipated within the volume of a large nonlinear zone at the crack tip – the fracture process zone – is introduced and tested on selected data from experimental campaigns published in the literature. The work is accompanied with own conducted numerical simulations using commercial finite element code with implemented cohesive crack model. Results from three-point bending tests on specimens of different sizes and relative notch lengths are taken into account in this study. The proposed model has only two parameters whose values are constant for all specimen sizes and notch lengths. |
| format | Article |
| id | doaj-art-539c3d616eec453a86ffa51dccf2b0ba |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-539c3d616eec453a86ffa51dccf2b0ba2025-02-03T00:42:32ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932017-01-011139172810.3221/IGF-ESIS.39.03Modelling of size and shape of damage zone in quasi-brittle notched specimens – analytical approach based on fracture-mechanical evaluation of loading curvesJ. Klon0V. Veselý1Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Veveří 331/95, 602 00 Brno, Czech RepublicBrno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Veveří 331/95, 602 00 Brno, Czech RepublicAn analysis focused on capturing the phenomenon of quasi-brittle fracture is presented. Selected parameters relevant for quasi-brittle fracture are evaluated and an assessment of their dependence on the size and shape of the test specimen is studied. Determination of these fracture characteristics is based on the records of the fracture tests on notched specimens, particularly from recorded loading diagrams. A method of separation of the energy amounts released for the propagation of the (effective) crack and that dissipated within the volume of a large nonlinear zone at the crack tip – the fracture process zone – is introduced and tested on selected data from experimental campaigns published in the literature. The work is accompanied with own conducted numerical simulations using commercial finite element code with implemented cohesive crack model. Results from three-point bending tests on specimens of different sizes and relative notch lengths are taken into account in this study. The proposed model has only two parameters whose values are constant for all specimen sizes and notch lengths.http://www.gruppofrattura.it/pdf/rivista/numero39/numero_39_art_3.pdfQuasi-brittle FractureLoading CurveWork of FractureResistance CurveEffective Crack |
| spellingShingle | J. Klon V. Veselý Modelling of size and shape of damage zone in quasi-brittle notched specimens – analytical approach based on fracture-mechanical evaluation of loading curves Fracture and Structural Integrity Quasi-brittle Fracture Loading Curve Work of Fracture Resistance Curve Effective Crack |
| title | Modelling of size and shape of damage zone in quasi-brittle notched specimens – analytical approach based on fracture-mechanical evaluation of loading curves |
| title_full | Modelling of size and shape of damage zone in quasi-brittle notched specimens – analytical approach based on fracture-mechanical evaluation of loading curves |
| title_fullStr | Modelling of size and shape of damage zone in quasi-brittle notched specimens – analytical approach based on fracture-mechanical evaluation of loading curves |
| title_full_unstemmed | Modelling of size and shape of damage zone in quasi-brittle notched specimens – analytical approach based on fracture-mechanical evaluation of loading curves |
| title_short | Modelling of size and shape of damage zone in quasi-brittle notched specimens – analytical approach based on fracture-mechanical evaluation of loading curves |
| title_sort | modelling of size and shape of damage zone in quasi brittle notched specimens analytical approach based on fracture mechanical evaluation of loading curves |
| topic | Quasi-brittle Fracture Loading Curve Work of Fracture Resistance Curve Effective Crack |
| url | http://www.gruppofrattura.it/pdf/rivista/numero39/numero_39_art_3.pdf |
| work_keys_str_mv | AT jklon modellingofsizeandshapeofdamagezoneinquasibrittlenotchedspecimensanalyticalapproachbasedonfracturemechanicalevaluationofloadingcurves AT vvesely modellingofsizeandshapeofdamagezoneinquasibrittlenotchedspecimensanalyticalapproachbasedonfracturemechanicalevaluationofloadingcurves |