Publication detail
Crack propagation criteria for the crack terminating on the interface of a thin orthotropic layer and an orthotropic substrate.
ŠEVEČEK, O. PROFANT, T. KOTOUL, M.
Czech title
Crack propagation criteria for the crack terminating on the interface of a thin orthotropic layer and an orthotropic substrate.
English title
Crack propagation criteria for the crack terminating on the interface of a thin orthotropic layer and an orthotropic substrate.
Type
conference paper
Language
en
Original abstract
The contribution discusses possible approach for the formulation of fracture criteria for the general stress concentrators – especially a surface crack terminating at the interface of two dissimilar orthotropic media. The classical differential analysis is unsuitable due to the discontinuity in the elastic properties which leads on the interface to a zero or infinite energy release rates. Theory of the Finite Fracture Mechanic is used to overcome this problem (crack increase of finite length is used instead of the infinitesimal one). The three possibilities of the crack propagation are taken into the consideration – crack deflection (single or double) and a penetration of the crack across the interface into the substrate. The so-called matched asymptotic procedure in combination with FEM is used for the calculation of appropriate changes of potential energy caused by the fracture.
Czech abstract
The contribution discusses possible approach for the formulation of fracture criteria for the general stress concentrators – especially a surface crack terminating at the interface of two dissimilar orthotropic media. The classical differential analysis is unsuitable due to the discontinuity in the elastic properties which leads on the interface to a zero or infinite energy release rates. Theory of the Finite Fracture Mechanic is used to overcome this problem (crack increase of finite length is used instead of the infinitesimal one). The three possibilities of the crack propagation are taken into the consideration – crack deflection (single or double) and a penetration of the crack across the interface into the substrate. The so-called matched asymptotic procedure in combination with FEM is used for the calculation of appropriate changes of potential energy caused by the fracture.
English abstract
The contribution discusses possible approach for the formulation of fracture criteria for the general stress concentrators – especially a surface crack terminating at the interface of two dissimilar orthotropic media. The classical differential analysis is unsuitable due to the discontinuity in the elastic properties which leads on the interface to a zero or infinite energy release rates. Theory of the Finite Fracture Mechanic is used to overcome this problem (crack increase of finite length is used instead of the infinitesimal one). The three possibilities of the crack propagation are taken into the consideration – crack deflection (single or double) and a penetration of the crack across the interface into the substrate. The so-called matched asymptotic procedure in combination with FEM is used for the calculation of appropriate changes of potential energy caused by the fracture.
Keywords in Czech
crack propagation criteria, deflection, interface, anisotropic
Keywords in English
crack propagation criteria, deflection, interface, anisotropic
RIV year
2007
Released
15.05.2007
Publisher
Institute of thermomechanics Academy of science of the Czech Republic
Location
Prague
ISBN
978-80-87012-06-2
Book
Engineering Mechanics 2007
Edition number
1
Pages from–to
271–272
Pages count
2
BIBTEX
@inproceedings{BUT22913,
author="Oldřich {Ševeček} and Tomáš {Profant} and Michal {Kotoul},
title="Crack propagation criteria for the crack terminating on the interface of a thin orthotropic layer and an orthotropic substrate.",
booktitle="Engineering Mechanics 2007",
year="2007",
month="May",
pages="271--272",
publisher="Institute of thermomechanics Academy of science of the Czech Republic",
address="Prague",
isbn="978-80-87012-06-2"
}