Deflection of an eccentric crack under mixed-mode conditions in an SCB specimen

• Autorzy: Malíková Lucie , Miarka Petr , Šimonová Hana , Kucharczyková Barbara

Identyfikatory

DOI

10.17512/bozpe.2020.2.09

• Języki publikacji: EN

Abstrakty

EN

Crack propagation under mixed-mode (I + II) conditions has been investigated in a semicircular disc where various levels of mixed-mode can be achieved by means of different geometry configurations. The research has been performed on a novel cementitious material, alkali-activated concrete. Its main advantage is that it is environment-friendly. On the other hand, its fracture mechanical properties, as of yet, have not been described sufficiently. Therefore, a fracture analysis has been performed. The crack deflection under three point bending conditions has been investigated numerically as well as experimentally. The numerical approach is based on a combination of the common finite element analysis and a multi-parameter form of the maximum tangential stress criterion. This generalized method is suitable especially for materials with specific (elasto-plastic, quasi-brittle etc.) fracture behaviour. The over-deterministic method together with the Williams expansion is applied to approximate selected stress tensor components around the crack tip. In this work, the influence of the eccentric crack is also discussed. In the conclusions, several recommendations about using single-parameter/multi-parameter fracture mechanics are stated.

Słowa kluczowe

EN

surface cracks; finite element analysis; stress; concrete

PL

pęknięcia powierzchniowe; analiza elementów skończonych; naprężenie; beton

• Wydawca: Wydawnictwo Politechniki Częstochowskiej
• Czasopismo: Budownictwo o Zoptymalizowanym Potencjale Energetycznym
• Rocznik: 2020
• Tom: Vol. 9 Nr 2
• Strony: 79--87
• Opis fizyczny: Bibliogr. 26 poz., rys., tab.

Twórcy

autor

Malíková Lucie

• Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Institute of Physics of Materials, Brno, Czech Republic

autor

Miarka Petr

• Academy of Sciences of the Czech Republic, Institute of Physics of Materials, Brno, Czech Republic and Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Brno, Czech Republic

autor

Šimonová Hana

• Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Brno, Czech Republic

autor

Kucharczyková Barbara

• Brno University of Technology, Faculty of Civil Engineering, Institute of Building Testing, Brno, Czech Republic

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).