An Improved Projection Method for Determination of Fatigue Parameters of Metal Structures Based on Spherical Direction Cosine Group Construction

An Improved Projection Method for Determination of Fatigue Parameters of Metal Structures Based on Spherical Direction Cosine Group Construction

The key components of railway rolling stock are almost constantly in the multiaxial stress state in service. To evaluate the fatigue strength of the structure, stress parameters should be obtained beforehand. The traditional projection method assumes that the maximum principal stress is the maximum...

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Veröffentlicht in:Проблемы прочности
Datum:2016
Hauptverfasser: Yang, B., Ma, B.Q., Wu, Y.Y., Chen, B., Xiao, S.N., Yang, G.W., Zhu, T.
Format: Artikel
Sprache:English
Veröffentlicht: Інститут проблем міцності ім. Г.С. Писаренко НАН України 2016
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Научно-технический раздел
Online Zugang:https://nasplib.isofts.kiev.ua/handle/123456789/173428
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Zitieren:An Improved Projection Method for Determination of Fatigue Parameters of Metal Structures Based on Spherical Direction Cosine Group Construction / B. Yang, B.Q. Ma, Y.Y. Wu, B. Chen, S.N. Xiao, G.W. Yang, T. Zhu // Проблемы прочности. — 2016. — № 1. — С. 145-153. — Бібліогр.: 14 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
id nasplib_isofts_kiev_ua-123456789-173428
record_format dspace
spelling Yang, B.
Ma, B.Q.
Wu, Y.Y.
Chen, B.
Xiao, S.N.
Yang, G.W.
Zhu, T.
2020-12-03T21:01:55Z
2020-12-03T21:01:55Z
2016
An Improved Projection Method for Determination of Fatigue Parameters of Metal Structures Based on Spherical Direction Cosine Group Construction / B. Yang, B.Q. Ma, Y.Y. Wu, B. Chen, S.N. Xiao, G.W. Yang, T. Zhu // Проблемы прочности. — 2016. — № 1. — С. 145-153. — Бібліогр.: 14 назв. — англ.
0556-171X
https://nasplib.isofts.kiev.ua/handle/123456789/173428
539.4
The key components of railway rolling stock are almost constantly in the multiaxial stress state in service. To evaluate the fatigue strength of the structure, stress parameters should be obtained beforehand. The traditional projection method assumes that the maximum principal stress is the maximum tensile stress, and then the projection process is performed without taking the tension/ compression states of principal stresses into account. To address these inadequacies, a method for fatigue parameter determination was proposed based on principal stress projection toward a spherical direction cosine group. This method can determine the direction of maximum tensile stress and preserve the tension/compression attribute of stress during calculating the maximum stress and the minimum stress. Therefore, the physical meaning of present improved method is more apparent than the traditional projection method, and its algorithm is simple and effective. The fatigue strength assessments of a welded bogie frame were performed utilizing the traditional projection method and present method respectively. Results show that some maximum stresses calculated by the improved method could be 19.4% higher than those obtained by the traditional one at some nodes, while the minimum stresses and the stress ratio deduced from these two methods could even be of opposite sign. The present method, which takes the tension/compression properties of principal stresses into consideration, is more reasonable, as compared with the traditional projection method, and thus the fatigue strength assessment results are more credible.
Present work is supported by the National Natural Science Foundation of China (51205326 and 51275432), the Opening Project of State Key Laboratory of Traction Power (Grant No. 2015TPL_T13), and the Fundamental Research Funds for the Central Universities (SWJTU11CX075).
en
Інститут проблем міцності ім. Г.С. Писаренко НАН України
Проблемы прочности
Научно-технический раздел
An Improved Projection Method for Determination of Fatigue Parameters of Metal Structures Based on Spherical Direction Cosine Group Construction
Улучшенный метод проекции для определения параметров усталости металлических конструкций на основе конструкции сферического направляющего косинуса
Article
published earlier
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
title An Improved Projection Method for Determination of Fatigue Parameters of Metal Structures Based on Spherical Direction Cosine Group Construction
spellingShingle An Improved Projection Method for Determination of Fatigue Parameters of Metal Structures Based on Spherical Direction Cosine Group Construction
Yang, B.
Ma, B.Q.
Wu, Y.Y.
Chen, B.
Xiao, S.N.
Yang, G.W.
Zhu, T.
Научно-технический раздел
title_short An Improved Projection Method for Determination of Fatigue Parameters of Metal Structures Based on Spherical Direction Cosine Group Construction
title_full An Improved Projection Method for Determination of Fatigue Parameters of Metal Structures Based on Spherical Direction Cosine Group Construction
title_fullStr An Improved Projection Method for Determination of Fatigue Parameters of Metal Structures Based on Spherical Direction Cosine Group Construction
title_full_unstemmed An Improved Projection Method for Determination of Fatigue Parameters of Metal Structures Based on Spherical Direction Cosine Group Construction
title_sort improved projection method for determination of fatigue parameters of metal structures based on spherical direction cosine group construction
author Yang, B.
Ma, B.Q.
Wu, Y.Y.
Chen, B.
Xiao, S.N.
Yang, G.W.
Zhu, T.
author_facet Yang, B.
Ma, B.Q.
Wu, Y.Y.
Chen, B.
Xiao, S.N.
Yang, G.W.
Zhu, T.
topic Научно-технический раздел
topic_facet Научно-технический раздел
publishDate 2016
language English
container_title Проблемы прочности
publisher Інститут проблем міцності ім. Г.С. Писаренко НАН України
format Article
title_alt Улучшенный метод проекции для определения параметров усталости металлических конструкций на основе конструкции сферического направляющего косинуса
description The key components of railway rolling stock are almost constantly in the multiaxial stress state in service. To evaluate the fatigue strength of the structure, stress parameters should be obtained beforehand. The traditional projection method assumes that the maximum principal stress is the maximum tensile stress, and then the projection process is performed without taking the tension/ compression states of principal stresses into account. To address these inadequacies, a method for fatigue parameter determination was proposed based on principal stress projection toward a spherical direction cosine group. This method can determine the direction of maximum tensile stress and preserve the tension/compression attribute of stress during calculating the maximum stress and the minimum stress. Therefore, the physical meaning of present improved method is more apparent than the traditional projection method, and its algorithm is simple and effective. The fatigue strength assessments of a welded bogie frame were performed utilizing the traditional projection method and present method respectively. Results show that some maximum stresses calculated by the improved method could be 19.4% higher than those obtained by the traditional one at some nodes, while the minimum stresses and the stress ratio deduced from these two methods could even be of opposite sign. The present method, which takes the tension/compression properties of principal stresses into consideration, is more reasonable, as compared with the traditional projection method, and thus the fatigue strength assessment results are more credible.
issn 0556-171X
url https://nasplib.isofts.kiev.ua/handle/123456789/173428
citation_txt An Improved Projection Method for Determination of Fatigue Parameters of Metal Structures Based on Spherical Direction Cosine Group Construction / B. Yang, B.Q. Ma, Y.Y. Wu, B. Chen, S.N. Xiao, G.W. Yang, T. Zhu // Проблемы прочности. — 2016. — № 1. — С. 145-153. — Бібліогр.: 14 назв. — англ.
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