Estimation of the crack propagation direction of a crack touching the interface between two elastic materials

0091122 - ÚFM 2008 CZ eng A - Abstract
Náhlík, Luboš - Šestáková, Lucie - Hutař, Pavel
Estimation of the crack propagation direction of a crack touching the interface between two elastic materials.
[Odhad směru šíření trhliny s vrcholem na rozhraní mezi dvěma elastickými materiály.]
5th International Conference on Materials Structure and Micromechanics of Fracture. Abstract booklet. Brno: VUTIUM, 2007 - (Šandera, P.). s. 74-74. ISBN 978-80-214-3434-9.
[MSMF /5./. 27.06.2007-29.06.2007, Brno]
R&D Projects: GA ČR(CZ) GA101/05/0320; GA ČR GP106/06/P239
Keywords : crack propagation direction * bi-material interface * crack stability
Subject RIV: JL - Materials Fatigue, Friction Mechanics

The objective of the paper is to investigate the direction of a further crack propagation from the interface between two elastic materials. The angle of crack propagation changes when the crack passes the interface. The suggested procedure makes it possible to estimate an angle of propagation under which the crack will propagate into the second material. The assumptions of linear elastic fracture mechanics and elastic behavior of the body with interfaces are considered. The finite element method was used for numerical calculations. The results obtained might contribute to a better understanding of the failure of materials with interfaces (e.g. layered composites, materials with protective coatings) and to a more reliable estimation of the service life of such structures.
Permanent Link: http://hdl.handle.net/11104/0151795