Differences in the response to in-phase and out-of-phase multiaxial high-cycle fatigue loading

This paper discusses the phase shift effect occurring between two and more load channels of multiaxially loaded specimens. The discussion concludes that there is an extreme shortage of good experimental data that would prove the existence and the trend of the phase shift effect in the high-cycle fat...

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Main Authors: Jan Papuga, Martin Nesládek, Josef Jurenka
Format: Article
Language:English
Published: Gruppo Italiano Frattura 2019-08-01
Series:Fracture and Structural Integrity
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Online Access:https://www.fracturae.com/index.php/fis/article/view/2310
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author Jan Papuga
Martin Nesládek
Josef Jurenka
author_facet Jan Papuga
Martin Nesládek
Josef Jurenka
author_sort Jan Papuga
collection DOAJ
description This paper discusses the phase shift effect occurring between two and more load channels of multiaxially loaded specimens. The discussion concludes that there is an extreme shortage of good experimental data that would prove the existence and the trend of the phase shift effect in the high-cycle fatigue region. It is no wonder that there are so many fatigue strength estimation criteria that use quite different computational concepts, because the response to the phase shift effect in the experimental base is often hidden in a conglomeration of other interacting effects. The paper presents results of a sensitivity study that compares the fatigue strength estimation results for various such criteria for the same stress amplitudes, but for different phase shifts between the push-pull and torsion load channels. These results show that, with the exception of criteria, that assume a zero phase shift effect, the phase shift affects the results of each studied fatigue strength estimation criterion in a different way. If well-organized experiments were available, experiments corresponding to the described comparison between in-phase and out-of-phase loading would show the right trends, and the optimum criterion could be selected. A proposal for such an experimental setup is provided in the paper.
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spelling doaj-art-b7a16c33a44e43f89ef540c3866d98d62025-01-03T01:03:05ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932019-08-011350Differences in the response to in-phase and out-of-phase multiaxial high-cycle fatigue loadingJan Papuga0Martin Nesládek1Josef Jurenka2Faculty of Mechanical Engineering, Czech Technical University in PragueFaculty of Mechanical Engineering, Czech Technical University in PragueFaculty of Mechanical Engineering, Czech Technical University in PragueThis paper discusses the phase shift effect occurring between two and more load channels of multiaxially loaded specimens. The discussion concludes that there is an extreme shortage of good experimental data that would prove the existence and the trend of the phase shift effect in the high-cycle fatigue region. It is no wonder that there are so many fatigue strength estimation criteria that use quite different computational concepts, because the response to the phase shift effect in the experimental base is often hidden in a conglomeration of other interacting effects. The paper presents results of a sensitivity study that compares the fatigue strength estimation results for various such criteria for the same stress amplitudes, but for different phase shifts between the push-pull and torsion load channels. These results show that, with the exception of criteria, that assume a zero phase shift effect, the phase shift affects the results of each studied fatigue strength estimation criterion in a different way. If well-organized experiments were available, experiments corresponding to the described comparison between in-phase and out-of-phase loading would show the right trends, and the optimum criterion could be selected. A proposal for such an experimental setup is provided in the paper.https://www.fracturae.com/index.php/fis/article/view/2310Proportional loadingNon-proportional loadingOut-of-phase loadingPhase shiftMultiaxial fatigueFatigue strength
spellingShingle Jan Papuga
Martin Nesládek
Josef Jurenka
Differences in the response to in-phase and out-of-phase multiaxial high-cycle fatigue loading
Fracture and Structural Integrity
Proportional loading
Non-proportional loading
Out-of-phase loading
Phase shift
Multiaxial fatigue
Fatigue strength
title Differences in the response to in-phase and out-of-phase multiaxial high-cycle fatigue loading
title_full Differences in the response to in-phase and out-of-phase multiaxial high-cycle fatigue loading
title_fullStr Differences in the response to in-phase and out-of-phase multiaxial high-cycle fatigue loading
title_full_unstemmed Differences in the response to in-phase and out-of-phase multiaxial high-cycle fatigue loading
title_short Differences in the response to in-phase and out-of-phase multiaxial high-cycle fatigue loading
title_sort differences in the response to in phase and out of phase multiaxial high cycle fatigue loading
topic Proportional loading
Non-proportional loading
Out-of-phase loading
Phase shift
Multiaxial fatigue
Fatigue strength
url https://www.fracturae.com/index.php/fis/article/view/2310
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