Crack initiation criteria for singular stress concentrations; Part III: An application for the crack touching the bimaterial interface

0337567 - ÚFM 2010 RIV CZ eng J - Journal Article
Náhlík, Luboš - Knésl, Zdeněk - Klusák, Jan
Crack initiation criteria for singular stress concentrations; Part III: An application for the crack touching the bimaterial interface.
Engineering Mechanics. Roč. 15, č. 2 (2008), s. 99-114. ISSN 1802-1484
R&D Projects: GA ČR GA101/05/0227; GA ČR(CZ) GA101/05/0320
Institutional research plan: CEZ:AV0Z20410507
Keywords : bimaterial interface * stability criteria * crack propagation * critical stress * threshold stress
Subject RIV: JL - Materials Fatigue, Friction Mechanics

The paper deals with crack propagation through an interface between two elastic materials. The basic idea of developing stability criteria of general singular stress concentrators introduced in the first part is applied to the case of a crack with its tip at the interface between two different materials. Three different stability criteria based on different physical principles are presented and a numerical example with their mutual comparison is carried out. A procedure based on a generalized strain energy density factor is shown which makes it possible to estimate the further direction of crack propagation after the crack has passed the interface. The procedure presented is applied in the numerical examples.
Permanent Link: http://hdl.handle.net/11104/0181530