Crack propagation through the interface between two polymer materials

0353976 - ÚFM 2011 RIV CZ eng A - Abstract
Zouhar, Michal - Hutař, Pavel - Náhlík, Luboš
Crack propagation through the interface between two polymer materials.
Computational Mechanics 2010 - Book of extended abstracts. Pilsen: University of West Bohemia, Pilsen, 2010 - (Adámek, V.; Zajíček, M.). s. 1-2. ISBN 978-80-7043-919-7.
[Computational Mechanics 2010. 08.11.2010-10.11.2010, Hrad Nečtiny]
R&D Projects: GA AV ČR(CZ) KJB200410803; GA ČR GA106/09/0279; GA ČR GD106/09/H035
Institutional research plan: CEZ:AV0Z20410507
Keywords : material interface * stability criteria * critical distance * FEM
Subject RIV: JL - Materials Fatigue, Friction Mechanics

The existence of step change of the material properties influences stress distribution near the crack tip and also influences crack propagation through the interface. This work is focused on stability conditions of the crack perpendicular to the interface between two polymer materials and discusses estimation of the critical distance d used in stability criteria for crack touching the interface. The stability condition of the crack penetrating through the interface between two polymer materials was studied and numerically investigated. The resultant values of critical load were determined by stability criterion based on strain energy density factor for different elastic mismatch of the materials considered and for different values of critical distance d. The results of this study can lead to better lifetime prediction and safer design of layered structures.
Permanent Link: http://hdl.handle.net/11104/0193075