Williams expansion utilized for assessment of crack behaviour under mixed-mode loading in alkali-activated fine-grained composite

0544147 - ÚFM 2022 RIV BE eng J - Journal Article
Malíková, Lucie - Miarka, Petr - Kucharczyková, B. - Simonová, H.
Williams expansion utilized for assessment of crack behaviour under mixed-mode loading in alkali-activated fine-grained composite.
Fatigue and Fracture of Engineering Materials and Structures. Roč. 44, č. 5 (2021), s. 1151-1161. ISSN 8756-758X. E-ISSN 1460-2695
Institutional support: RVO:68081723
Keywords : tip asymptotic field * t-stress * fracture criteria * brittle-fracture * initiation * coefficients * propagation * parameters * strength * geometry * alkali-activated concrete * mixed-mode loading * multi-parameter fracture criteria * Williams expansion
OECD category: Electrical and electronic engineering
Impact factor: 3.373, year: 2021
Method of publishing: Limited access
https://onlinelibrary.wiley.com/doi/10.1111/ffe.13418

The paper concerns an experimental study on the crack deflection angle in a semi-circular disc made of an alkali-activated fine-grained composite under mixed-mode conditions. This study is supplemented by an extensive numerical analysis that calculates the crack deflection angles via generalized (multi-parameter) fracture criteria. It is proved that the use of higher-order terms of the Williams expansion for the approximation of the crack-tip stress field leads to more accurate results. The influence of various parameters on the crack deflection angle is discussed, and recommendations on their proper choice are presented. The conclusions help in describing the crack behaviour under mixed-mode conditions more accurately.
Permanent Link: http://hdl.handle.net/11104/0321188