Publication detail
Shift of S-N curves of ferritic nodular cast iron due to loading cycle asymmetry
KOHOUT, J. VĚCHET, S.
Czech title
Shift of S-N curves of ferritic nodular cast iron due to loading cycle asymmetry
English title
Shift of S-N curves of ferritic nodular cast iron due to loading cycle asymmetry
Type
journal article - other
Language
en
Original abstract
Increasing the mean stress of loading cycle causes a shift of fatigue (Wöhler s or S-N) curves towards higher values of fatigue strength if the curves are represented by the upper stress of loading cycle in dependence on the number of cycles to fracture. A successful quantitative description of the shift in gigh-cycle region was published by Walker. The aim of the present paper consists in deriving relations that describe the shift of fatigue curves in the whole cycle region from UTS to permanent fatigue limit. Their applicability is demonstrated by successful fit of the family of tfatigue curves loading cycle asymetries when the curves are described by the Stromeyer qquation as well as by the Kohout and Vechet qquation. Also the limitation of Walker s approach in the case of high mean stresses is discussed and a certain solution is proposed.
Czech abstract
Increasing the mean stress of loading cycle causes a shift of fatigue (Wöhler s or S-N) curves towards higher values of fatigue strength if the curves are represented by the upper stress of loading cycle in dependence on the number of cycles to fracture. A successful quantitative description of the shift in gigh-cycle region was published by Walker. The aim of the present paper consists in deriving relations that describe the shift of fatigue curves in the whole cycle region from UTS to permanent fatigue limit. Their applicability is demonstrated by successful fit of the family of tfatigue curves loading cycle asymetries when the curves are described by the Stromeyer qquation as well as by the Kohout and Vechet qquation. Also the limitation of Walker s approach in the case of high mean stresses is discussed and a certain solution is proposed.
English abstract
Increasing the mean stress of loading cycle causes a shift of fatigue (Wöhler s or S-N) curves towards higher values of fatigue strength if the curves are represented by the upper stress of loading cycle in dependence on the number of cycles to fracture. A successful quantitative description of the shift in gigh-cycle region was published by Walker. The aim of the present paper consists in deriving relations that describe the shift of fatigue curves in the whole cycle region from UTS to permanent fatigue limit. Their applicability is demonstrated by successful fit of the family of tfatigue curves loading cycle asymetries when the curves are described by the Stromeyer qquation as well as by the Kohout and Vechet qquation. Also the limitation of Walker s approach in the case of high mean stresses is discussed and a certain solution is proposed.
Keywords in Czech
materiálové vědy; feritická tvárná litina; únavové chování; S-N křivky
Keywords in English
materials science; ferritic nodular cast iron; fatigue behavior; S-N curve
RIV year
2008
Released
22.03.2008
Publisher
KING FAGD UNIVERSITY OF TETROLEUM AND MINERALS, DGAGRAN 31261, SAUDI ARABIA
Location
Dahran, Saudi Arabia
ISSN
1319-8025
Journal
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
Volume
33
Number
1B
Pages from–to
213–222
Pages count
10
BIBTEX
@article{BUT48603,
author="Jan {Kohout} and Stanislav {Věchet},
title="Shift of S-N curves of ferritic nodular cast iron due to loading cycle asymmetry",
journal="ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING",
year="2008",
volume="33",
number="1B",
month="March",
pages="213--222",
publisher="KING FAGD UNIVERSITY OF TETROLEUM AND MINERALS, DGAGRAN 31261, SAUDI ARABIA",
address="Dahran, Saudi Arabia",
issn="1319-8025"
}