Crack propagation in the vicinity of the interface in layered materials

0337547 - ÚFM 2010 RIV CZ eng J - Journal Article
Šestáková, Lucie - Náhlík, Luboš - Hutař, Pavel - Knésl, Zdeněk
Crack propagation in the vicinity of the interface in layered materials.
Applied and Computational Mechanics. Roč. 3, č. 1 (2009), s. 195-204. ISSN 1802-680X
R&D Projects: GA AV ČR(CZ) KJB200410803; GA ČR GA106/09/0279
Institutional research plan: CEZ:AV0Z20410507
Keywords : crack * bi-material interface * stability criteria * layered materials
Subject RIV: JL - Materials Fatigue, Friction Mechanics

The paper deals with the problem of crack propagation in the vicinity of the interface in layered materials. The configuration of a crack with its tip at the bi-material in-terface can be created during crack propagation in the structure. It is important to decide if the crack propagates into the second material in this case. The step change of material properties at the bi-material interface means that classical linear elastic fracture mechanics are not appropriate. A generalized approach has to be applied. In this paper, two criteria are applied for the determination of the critical value of an applied load. Knowledge of these values is important for the estimation of the service life time of such structures.The results obtained can be used especially for multi-layer polymer composites designs. On the basis of the procedures presented, suitable materials combinations can be suggested for new composite structures.
Permanent Link: http://hdl.handle.net/11104/0181515