Authors: Seitl, S. ; Miarka, P. ; Růžička, V. ; Malíková, Lucie ; Merta, I.
Document type: Papers
Conference/Event: Conference Structural Reliability/ Modelling in mechanics 2018, Ostrava (CZ), 20180524
Year: 2018
Language: eng
Abstract: Multi-parameter fracture mechanics is nowadays quite extensively applied when cracked\nstructures/specimens are investigated. The reason is that it has been shown that it can be\nhelpful and bring more accurate results when fracture processes happen in a larger\nregion around the crack tip, what can be typical for material like concrete or other\nmaterials with quasi-brittle behaviour. Various relative crack length configurations have\nbeen chosen in order to investigate the importance of the higher-order terms of the\nWilliams power expansion on the crack-tip stress field distribution in Wedge splitting\ntest specimen. The higher-order terms are calculated by means of the over-deterministic\nmethod from displacements of nodes around the crack tip obtained by a finite element\nanalysis in different radial distances from the crack tip. The effect of the constraint level\nis investigated. Although the third and higher terms of the Williams series are very often\nneglected, their influence on the opening stress values is investigated.
Keywords: constraint; displacement; FEM; ODM, WST; stress intensity factor; Williams series; WST
Host item entry: Proceedings of scientific conference Structural Reliability/ Modelling in mechanics 2018, ISBN 978-80-248-4175-5

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0289255

Permalink: http://www.nusl.cz/ntk/nusl-389931

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 Record created 2018-11-26, last modified 2019-03-28

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