Publication detail
The influence of discontinuity and orthotropy of fracture toughness on conditions of fracture initiation in singular stress concentrators
KLUSÁK, J. PROFANT, T. KNÉSL, Z. KOTOUL, M.
Czech title
The influence of discontinuity and orthotropy of fracture toughness on conditions of fracture initiation in singular stress concentrators
English title
The influence of discontinuity and orthotropy of fracture toughness on conditions of fracture initiation in singular stress concentrators
Type
journal article - other
Language
en
Original abstract
This paper deals with assessment of conditions of fracture initiation in singular stress concentrations that are modeled by a bi-material notch composed of two orthotropic materials. Within the assessment of the stress concentrators, the stability criteria based on standard linear elastic fracture mechanics can lead to incorrect results due to discontinuity and orthotropy of fracture toughness. Procedures in literature suggested for assessing the critical applied loading and fracture initiation direction usually consider only the change of elastic constants of the material and do not consider the change of fracture toughness. The stability criterion considering fracture toughness dependent on the direction of presupposed fracture initiation is shown in the paper. It is concluded that the criterion of this kind can qualitatively and quantitatively influence the estimated fracture initiation conditions, and it contributes to more reliable assessment of components with geometrical and/or material discontinuity.
Czech abstract
This paper deals with assessment of conditions of fracture initiation in singular stress concentrations that are modeled by a bi-material notch composed of two orthotropic materials. Within the assessment of the stress concentrators, the stability criteria based on standard linear elastic fracture mechanics can lead to incorrect results due to discontinuity and orthotropy of fracture toughness. Procedures in literature suggested for assessing the critical applied loading and fracture initiation direction usually consider only the change of elastic constants of the material and do not consider the change of fracture toughness. The stability criterion considering fracture toughness dependent on the direction of presupposed fracture initiation is shown in the paper. It is concluded that the criterion of this kind can qualitatively and quantitatively influence the estimated fracture initiation conditions, and it contributes to more reliable assessment of components with geometrical and/or material discontinuity.
English abstract
This paper deals with assessment of conditions of fracture initiation in singular stress concentrations that are modeled by a bi-material notch composed of two orthotropic materials. Within the assessment of the stress concentrators, the stability criteria based on standard linear elastic fracture mechanics can lead to incorrect results due to discontinuity and orthotropy of fracture toughness. Procedures in literature suggested for assessing the critical applied loading and fracture initiation direction usually consider only the change of elastic constants of the material and do not consider the change of fracture toughness. The stability criterion considering fracture toughness dependent on the direction of presupposed fracture initiation is shown in the paper. It is concluded that the criterion of this kind can qualitatively and quantitatively influence the estimated fracture initiation conditions, and it contributes to more reliable assessment of components with geometrical and/or material discontinuity.
Keywords in Czech
Kompozity, Obecná lomová mechanika, , Zkresleni lomove houzevnatosti, Bimaterialove vruby, Stabilita vrubu
Keywords in English
Composites, Generalized fracture mechanics, Fracture toughness mismatch, Bi-material notches, Stability criterion of notches
RIV year
2013
Released
04.09.2013
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Location
England, Oxford
ISSN
0013-7944
Volume
110
Number
2013
Pages from–to
438–447
Pages count
10
BIBTEX
@article{BUT106074,
author="Jan {Klusák} and Tomáš {Profant} and Zdeněk {Knésl} and Michal {Kotoul},
title="The influence of discontinuity and orthotropy of fracture toughness on conditions of fracture initiation in singular stress concentrators",
year="2013",
volume="110",
number="2013",
month="September",
pages="438--447",
publisher="PERGAMON-ELSEVIER SCIENCE LTD",
address="England, Oxford",
issn="0013-7944"
}