Crack propagation in the vicinity of the interface between two elastic materials

0318816 - ÚFM 2009 RIV DZ eng C - Conference Paper (international conference)
Náhlík, Luboš - Šestáková, Lucie - Hutař, Pavel
Crack propagation in the vicinity of the interface between two elastic materials.
[Šíření trhliny v blízkosti rozhraní mezi dvěma elastickými materiály.]
Damage and Fracture Mechanics - Failure Analysis of Engineering Materials and Structures. Algérie: The Algerian Association for the Technology Transfer, 2008, s. 1-11. ISBN N.
[Damage and Fracture Mechanics. Algérie (DZ), 01.06.2008-05.06.2008]
R&D Projects: GA AV ČR(CZ) KJB200410803; GA ČR GP106/06/P239
Institutional research plan: CEZ:AV0Z20410507
Keywords : bimaterial interface * crack propagation direction * layered composites
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 based on a generalized form of Sih's strain energy density factor 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 the elastic behavior of the body with interfaces are considered. The finite element method was used for numerical 2D and 3D 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, etc.).

Cílem práce je odhad směru šíření trhliny z materiálového rozhraní mezi dvěma elastickými materiály. Procedura je založena na Sihově faktoru hustoty deformační energie. Metoda konečných prvků byla použita pro 2D i 3D simulace.
Permanent Link: http://hdl.handle.net/11104/0168130