Use of elastic stresses for a multiaxial fatigue prediction
A new computational method derived from Papuga PCr multiaxial criterion is presented in the paper. While the PCr criterion is suitable for a comparison of a local multiaxial loading with a fatigue limit, the PCF criterion derived is focused on computation within a finite life. Its use is intended fo...
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University of West Bohemia
2007-11-01
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Online Access: | http://www.kme.zcu.cz/acm/old_acm/full_papers/acm_vol1no2_p075.pdf |
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doaj-c00e929b8e5b48deb0cc525ce38241f62021-09-02T02:54:05ZengUniversity of West BohemiaApplied and Computational Mechanics1802-680X2007-11-0112631640Use of elastic stresses for a multiaxial fatigue predictionRůžička M.Papuga J.Hrubý Z.Doubrava K.A new computational method derived from Papuga PCr multiaxial criterion is presented in the paper. While the PCr criterion is suitable for a comparison of a local multiaxial loading with a fatigue limit, the PCF criterion derived is focused on computation within a finite life. Its use is intended for a variable amplitude multiaxial loading, where the Palmgren-Miner damage cumulation law is applied. The PCF method is based on local elastic stresses and their action within the standard S-N curves of smooth specimens. No arrangement concerning the stress gradient effect was applied, since the experiments serving for comparison were carried on smooth and unnotched specimens. The experimental set covers different load paths applied to specimens manufactured of CSN 41 1523 structural steel. Computational results are promising for cases with load paths formed from single unclosed lines, but for the cases with load paths related to closed constructs it provides too conservative solution. A need for a further term counting for the multiaxial hardening is discussed.http://www.kme.zcu.cz/acm/old_acm/full_papers/acm_vol1no2_p075.pdfMultiaxial fatigue calculationHigh-cycle fatigueLow-cycle fatigueLoad path effect |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Růžička M. Papuga J. Hrubý Z. Doubrava K. |
spellingShingle |
Růžička M. Papuga J. Hrubý Z. Doubrava K. Use of elastic stresses for a multiaxial fatigue prediction Applied and Computational Mechanics Multiaxial fatigue calculation High-cycle fatigue Low-cycle fatigue Load path effect |
author_facet |
Růžička M. Papuga J. Hrubý Z. Doubrava K. |
author_sort |
Růžička M. |
title |
Use of elastic stresses for a multiaxial fatigue prediction |
title_short |
Use of elastic stresses for a multiaxial fatigue prediction |
title_full |
Use of elastic stresses for a multiaxial fatigue prediction |
title_fullStr |
Use of elastic stresses for a multiaxial fatigue prediction |
title_full_unstemmed |
Use of elastic stresses for a multiaxial fatigue prediction |
title_sort |
use of elastic stresses for a multiaxial fatigue prediction |
publisher |
University of West Bohemia |
series |
Applied and Computational Mechanics |
issn |
1802-680X |
publishDate |
2007-11-01 |
description |
A new computational method derived from Papuga PCr multiaxial criterion is presented in the paper. While the PCr criterion is suitable for a comparison of a local multiaxial loading with a fatigue limit, the PCF criterion derived is focused on computation within a finite life. Its use is intended for a variable amplitude multiaxial loading, where the Palmgren-Miner damage cumulation law is applied. The PCF method is based on local elastic stresses and their action within the standard S-N curves of smooth specimens. No arrangement concerning the stress gradient effect was applied, since the experiments serving for comparison were carried on smooth and unnotched specimens. The experimental set covers different load paths applied to specimens manufactured of CSN 41 1523 structural steel. Computational results are promising for cases with load paths formed from single unclosed lines, but for the cases with load paths related to closed constructs it provides too conservative solution. A need for a further term counting for the multiaxial hardening is discussed. |
topic |
Multiaxial fatigue calculation High-cycle fatigue Low-cycle fatigue Load path effect |
url |
http://www.kme.zcu.cz/acm/old_acm/full_papers/acm_vol1no2_p075.pdf |
work_keys_str_mv |
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