Influence of different types of small-size defects on propagation of macro-cracks in brittle materials
Karpenko, Olena and Oterkus, Selda and Oterkus, Erkan (2020) Influence of different types of small-size defects on propagation of macro-cracks in brittle materials. Journal of Peridynamics and Nonlocal Modeling. ISSN 2522-8978 (https://doi.org/10.1007/s42102-020-00032-z)
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Abstract
The presence of defects in the structure requires noticeable attention and understanding of fracture mechanisms in brittle materials has to be established. Defects in the form of holes, macro- and micro-cracks are the main interest of this paper. This work investigates the dual role of holes and micro-crack arrays on toughening and degradation mechanisms in concrete structures. An ordinary state-based peridynamics (PD) model is utilized to analyse the fracture problem at the micro-level. The application of PD shows its advantage in crack-hole, macro- and micro-crack interaction problems since PD can accurately predict the contribution of defects on structural behaviour. The study of the three-point bending problem with five types of holes existing in the structure showed the crack arrest phenomena at the hole boundary and the “attraction” of the crack to propagate towards the hole. For the study of the macro- and micro-cracks interaction problem, various cases of the micro-crack distribution and inclination angles are considered and validated with analytical studies. The PD quasi-static simulations show good agreement with analytical solutions. Moreover, PD dynamic solutions show the capability of PD to capture complex crack propagation paths. It is observed that the presence of micro-cracks and holes ahead of the main crack can suppress its further propagation as well as have an influence on the crack propagation direction. The numerical results demonstrate the efficiency of the PD modelling of multiple crack interaction problems.
ORCID iDs
Karpenko, Olena, Oterkus, Selda ORCID: https://orcid.org/0000-0003-0474-0279 and Oterkus, Erkan ORCID: https://orcid.org/0000-0002-4614-7214;-
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Item type: Article ID code: 72280 Dates: DateEvent30 April 2020Published30 April 2020Published Online8 April 2020AcceptedSubjects: Naval Science > Naval architecture. Shipbuilding. Marine engineering Department: Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering
Strategic Research Themes > Energy
Strategic Research Themes > Advanced Manufacturing and MaterialsDepositing user: Pure Administrator Date deposited: 06 May 2020 10:13 Last modified: 22 Sep 2024 13:26 URI: https://strathprints.strath.ac.uk/id/eprint/72280