Experimental Study on the Coaxing Effect of Multi-Level Stresses with Different Sequences
The coaxing effect in fatigue refers to an increase in the fatigue strength of material imduced by prior cycling at a stress level below the fatigue limit. In this study, the coaxing effect of multi-level stresses in the fatigue process in the automotive drive shaft material 40Cr was investigated by...
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| Опубліковано в: : | Проблемы прочности |
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| Дата: | 2017 |
| Автори: | , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут проблем міцності ім. Г.С. Писаренко НАН України
2017
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/173583 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Experimental Study on the Coaxing Effect of Multi-Level Stresses with Different Sequences / L.H. Zhao, J.X. Li, W.Y. Yu, J. Ma, S.L. Zheng // Проблемы прочности. — 2017. — № 1. — С. 66-71. — Бібліогр.: 15 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
nasplib_isofts_kiev_ua-123456789-173583 |
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dspace |
| spelling |
Zhao, L.H. Li, J.X. Yu, W.Y. Ma, J. Zheng, S.L. 2020-12-12T13:55:04Z 2020-12-12T13:55:04Z 2017 Experimental Study on the Coaxing Effect of Multi-Level Stresses with Different Sequences / L.H. Zhao, J.X. Li, W.Y. Yu, J. Ma, S.L. Zheng // Проблемы прочности. — 2017. — № 1. — С. 66-71. — Бібліогр.: 15 назв. — англ. 0556-171X https://nasplib.isofts.kiev.ua/handle/123456789/173583 539.4 The coaxing effect in fatigue refers to an increase in the fatigue strength of material imduced by prior cycling at a stress level below the fatigue limit. In this study, the coaxing effect of multi-level stresses in the fatigue process in the automotive drive shaft material 40Cr was investigated by applying three levels of stress amplitudes below the fatigue limit in different sequences prior to conducting the conventional constant amplitude fatigue test with standard round bar specimens. The existence of coaxing effect under multi-level stress with a load sequence effect was observed and confirmed by the results. The longest fatigue life is achieved through three levels of coaxing load with a step increase sequence, while a decrease sequence will result in the shortest fatigue life. The mechanisms of the coaxing effect which increased the fatigue life at the crack initiation and propagation stages were observed, through fracture morphology analysis, as the regulation ofmicropores, decreasing ofpore density and the narrowed striation spacing. This finding is instrumental for extending the service life of mechanical components. This work was supported by the National Natural Science Foundation of China (Grant No. 51375313). en Інститут проблем міцності ім. Г.С. Писаренко НАН України Проблемы прочности Научно-технический раздел Experimental Study on the Coaxing Effect of Multi-Level Stresses with Different Sequences Экспериментальное исследование влияния предварительных циклических нагрузок ниже предела выносливости на усталостную долговечность стали 400 Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Experimental Study on the Coaxing Effect of Multi-Level Stresses with Different Sequences |
| spellingShingle |
Experimental Study on the Coaxing Effect of Multi-Level Stresses with Different Sequences Zhao, L.H. Li, J.X. Yu, W.Y. Ma, J. Zheng, S.L. Научно-технический раздел |
| title_short |
Experimental Study on the Coaxing Effect of Multi-Level Stresses with Different Sequences |
| title_full |
Experimental Study on the Coaxing Effect of Multi-Level Stresses with Different Sequences |
| title_fullStr |
Experimental Study on the Coaxing Effect of Multi-Level Stresses with Different Sequences |
| title_full_unstemmed |
Experimental Study on the Coaxing Effect of Multi-Level Stresses with Different Sequences |
| title_sort |
experimental study on the coaxing effect of multi-level stresses with different sequences |
| author |
Zhao, L.H. Li, J.X. Yu, W.Y. Ma, J. Zheng, S.L. |
| author_facet |
Zhao, L.H. Li, J.X. Yu, W.Y. Ma, J. Zheng, S.L. |
| topic |
Научно-технический раздел |
| topic_facet |
Научно-технический раздел |
| publishDate |
2017 |
| language |
English |
| container_title |
Проблемы прочности |
| publisher |
Інститут проблем міцності ім. Г.С. Писаренко НАН України |
| format |
Article |
| title_alt |
Экспериментальное исследование влияния предварительных циклических нагрузок ниже предела выносливости на усталостную долговечность стали 400 |
| description |
The coaxing effect in fatigue refers to an increase in the fatigue strength of material imduced by prior cycling at a stress level below the fatigue limit. In this study, the coaxing effect of multi-level stresses in the fatigue process in the automotive drive shaft material 40Cr was investigated by applying three levels of stress amplitudes below the fatigue limit in different sequences prior to conducting the conventional constant amplitude fatigue test with standard round bar specimens. The existence of coaxing effect under multi-level stress with a load sequence effect was observed and confirmed by the results. The longest fatigue life is achieved through three levels of coaxing load with a step increase sequence, while a decrease sequence will result in the shortest fatigue life. The mechanisms of the coaxing effect which increased the fatigue life at the crack initiation and propagation stages were observed, through fracture morphology analysis, as the regulation ofmicropores, decreasing ofpore density and the narrowed striation spacing. This finding is instrumental for extending the service life of mechanical components.
|
| issn |
0556-171X |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/173583 |
| citation_txt |
Experimental Study on the Coaxing Effect of Multi-Level Stresses with Different Sequences / L.H. Zhao, J.X. Li, W.Y. Yu, J. Ma, S.L. Zheng // Проблемы прочности. — 2017. — № 1. — С. 66-71. — Бібліогр.: 15 назв. — англ. |
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