DISPLACEMENT FIELD ANALYSIS IN WEDGE SPLITTING TEST\nSPECIMEN BY ODM METHOD

0495742 - ÚFM 2019 RIV CZ eng C - Conference Paper (international conference)
Seitl, S. - Miarka, P. - Růžička, V. - Malíková, Lucie - Merta, I.
DISPLACEMENT FIELD ANALYSIS IN WEDGE SPLITTING TEST
SPECIMEN BY ODM METHOD.
Proceedings of scientific conference Structural Reliability/ Modelling in mechanics 2018. Ostrava: VŠB-TU Ostrava, Faculty of Civil Engineering, 2018 - (Krejsa, M.; Lausová, L.), s. 1-7. ISBN 978-80-248-4175-5.
[Conference Structural Reliability/ Modelling in mechanics 2018. Ostrava (CZ), 24.05.2018-25.05.2018]
Institutional support: RVO:68081723
Keywords : ODM, WST * WST * constraint * Williams series * FEM * stress intensity factor * displacement
OECD category: Audio engineering, reliability analysis

Multi-parameter fracture mechanics is nowadays quite extensively applied when cracked
structures/specimens are investigated. The reason is that it has been shown that it can be
helpful and bring more accurate results when fracture processes happen in a larger
region around the crack tip, what can be typical for material like concrete or other
materials with quasi-brittle behaviour. Various relative crack length configurations have
been chosen in order to investigate the importance of the higher-order terms of the
Williams power expansion on the crack-tip stress field distribution in Wedge splitting
test specimen. The higher-order terms are calculated by means of the over-deterministic
method from displacements of nodes around the crack tip obtained by a finite element
analysis in different radial distances from the crack tip. The effect of the constraint level
is investigated. Although the third and higher terms of the Williams series are very often
neglected, their influence on the opening stress values is investigated.
Permanent Link: http://hdl.handle.net/11104/0289255