Publication detail
Determination of crack propagation direction using approach based on generalized linear elastic fracture
NÁHLÍK, L. HUTAŘ, P. ŠEVČÍK, M. MALÍKOVÁ, L.
Czech title
Stanovení směru šíření trhliny na základě přístupu zobecněné lineárně elastické lomové mechaniky
English title
Determination of crack propagation direction using approach based on generalized linear elastic fracture
Type
conference paper
Language
en
Original abstract
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, due to different material properties of layers. The suggested procedure makes it possible to estimate an angle of crack propagation under which the crack will propagate into the second material. The assumptions of (generalized) linear elastic fracture mechanics, which takes into account stress singularity exponent different from 1/2 are considered. The finite element method was used for numerical calculations. As an example application of the suggested approach on crack propagation through laminar ceramics (residual stresses in individual layers are taken into account) is introduced and results obtained compared with experimental data. 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.
Czech abstract
Cílem práce je zjistit směr dalšího šíření trhliny s vrcholem na rozhraní mezi dvěmi elastickými materiály. U této konfigurace trhliny dochází ke změně úhlu dalšího šíření vzhledem k různým materiálovým vlastnostem jednotlivých vrstev. Navržený postup umožňuje odhadnout úhel růstu trhliny, pod kterým se bude trhlina šířit do druhého materiálu.
English abstract
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, due to different material properties of layers. The suggested procedure makes it possible to estimate an angle of crack propagation under which the crack will propagate into the second material. The assumptions of (generalized) linear elastic fracture mechanics, which takes into account stress singularity exponent different from 1/2 are considered. The finite element method was used for numerical calculations. As an example application of the suggested approach on crack propagation through laminar ceramics (residual stresses in individual layers are taken into account) is introduced and results obtained compared with experimental data. 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.
Keywords in Czech
šíření trhliny, zobecněný součinitel intenzity napětí, numerická simulace
Keywords in English
crack propagation, generalized stress intensity factor, numerical simulation
RIV year
2012
Released
19.09.2012
ISBN
9788895940441
Book
The 4th International Conference on Crack Paths (CP2012)
Pages from–to
1065–1072
Pages count
8
BIBTEX
@inproceedings{BUT97124,
author="Luboš {Náhlík} and Pavel {Hutař} and Martin {Ševčík} and Lucie {Malíková},
title="Determination of crack propagation direction using approach based on generalized linear elastic fracture",
booktitle="The 4th International Conference on Crack Paths (CP2012)",
year="2012",
month="September",
pages="1065--1072",
isbn="9788895940441"
}