An effect of the first non-singular term of the Williams asymptotic expansion to the stability of the bi-material orthotropic notch

0426549 - ÚFM 2015 RIV CH eng C - Conference Paper (international conference)
Profant, T. - Klusák, Jan - Ševeček, O. - Kotoul, M. - Hrstka, M. - Marcián, P.
An effect of the first non-singular term of the Williams asymptotic expansion to the stability of the bi-material orthotropic notch.
Materials Structure and Micromechanics of Fracture VII. Zurich: Trans Tech Publications, 2014 - (Šandera, P.), s. 745-748. Key Engineering Materials, 592-593. ISBN 978-3-03785-934-6. ISSN 1013-9826.
[MSMF 7 - International Conference on Materials Structure & Micromechanics of Fracture /7./. Brno (CZ), 01.07.2013-03.07.2013]
Institutional support: RVO:68081723
Keywords : Orthotropic bi-material notch * two-state integral * non-singular stress terms * T-stress * matched asymptotic expansion
Subject RIV: JL - Materials Fatigue, Friction Mechanics
http://www.scientific.net/KEM.592-593.745

The domain of the generalized stress intensity factors dominance ahead of the notch tip can be rather small with respect to the length of the perturbing cracks initiated from the tip of the notch. Thus the non-singular terms of the stress asymptotic expansion at the notch tip would play an important role in the notch tip stability. Following the procedures dealing with complex potential theory and path-independent two-state integrals developed for the singular stress analysis of the stress concentrators one can evaluate their magnitude and include them to the energy release rate of the preexisting crack initiated from the notch tip applying the matched asymptotic procedure. The presented analysis should lead to better understanding of the notch stability process and precising of the notch stability criteria.
Permanent Link: http://hdl.handle.net/11104/0232577