The analysis of structural fatigue under cyclic temperature loads

A problem has been identified related to deformations of aircraft structures operating in the extreme north and orbital objects in near-earth orbits under conditions of cyclic alternating temperature loads. The formulation of the problem of studying the deformations of materials of structures o...

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Main Authors: I. Yu. Lesnyak, Z. N. Sokolovskiy, S. V. Gavrilenko
Format: Article
Language:English
Published: Omsk State Technical University, Federal State Autonoumos Educational Institution of Higher Education 2021-12-01
Series:Омский научный вестник
Subjects:
Online Access:https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2021/%E2%84%966%20(180)%20(%D0%9E%D0%9D%D0%92)/16-20%20%D0%9B%D0%B5%D1%81%D0%BD%D1%8F%D0%BA%20%D0%98.%20%D0%AE.,%20%D0%A1%D0%BE%D0%BA%D0%BE%D0%BB%D0%BE%D0%B2%D1%81%D0%BA%D0%B8%D0%B9%20%D0%97.%20%D0%9D.,%20%D0%93%D0%B0%D0%B2%D1%80%D0%B8%D0%BB%D0%B5%D0%BD%D0%BA%D0%BE%20%D0%A1.%20%D0%92..pdf
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author I. Yu. Lesnyak
Z. N. Sokolovskiy
S. V. Gavrilenko
author_facet I. Yu. Lesnyak
Z. N. Sokolovskiy
S. V. Gavrilenko
author_sort I. Yu. Lesnyak
collection DOAJ
description A problem has been identified related to deformations of aircraft structures operating in the extreme north and orbital objects in near-earth orbits under conditions of cyclic alternating temperature loads. The formulation of the problem of studying the deformations of materials of structures operating under conditions of cyclic alternating temperature loads using the theories of cyclic strength, low-cycle fatigue and crack resistance is presented. It is assumed that at 16 revolutions of an orbital object around the Earth (the number of temperature loading cycles n ≥ 1,2105 ), cracking occurs or the size of existing cracks increases to a critical size from low-cycle fatigue. Linear deformations of the body material of the International Space Station are determined, taking into account heating from solar radiation and cooling, while in the shadow of the Earth. A hypothesis has been put forward that, under conditions of cyclic temperature loads, the maximum effect on the material endurance is exerted by the calculated ones: the amplitude of the stress cycle, the maximum stress of the cycle and the range of stress fluctuations in the cycle, both separately and jointly. Comparative analysis of the results of calculating the stresses under cyclic temperature loading according to 3 hypotheses showed that the values of the calculated stresses are the closest to the maximum cycle stress or to the cycle stress amplitude.
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publishDate 2021-12-01
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spelling doaj-art-f89310f1988145ae80b428beeffb19a42025-02-02T10:00:50ZengOmsk State Technical University, Federal State Autonoumos Educational Institution of Higher EducationОмский научный вестник1813-82252541-75412021-12-016 (180)162010.25206/1813-8225-2021-180-16-20The analysis of structural fatigue under cyclic temperature loadsI. Yu. Lesnyak0Z. N. Sokolovskiy1S. V. Gavrilenko2Omsk State Technical UniversityOmsk State Technical UniversityOmsk State Technical UniversityA problem has been identified related to deformations of aircraft structures operating in the extreme north and orbital objects in near-earth orbits under conditions of cyclic alternating temperature loads. The formulation of the problem of studying the deformations of materials of structures operating under conditions of cyclic alternating temperature loads using the theories of cyclic strength, low-cycle fatigue and crack resistance is presented. It is assumed that at 16 revolutions of an orbital object around the Earth (the number of temperature loading cycles n ≥ 1,2105 ), cracking occurs or the size of existing cracks increases to a critical size from low-cycle fatigue. Linear deformations of the body material of the International Space Station are determined, taking into account heating from solar radiation and cooling, while in the shadow of the Earth. A hypothesis has been put forward that, under conditions of cyclic temperature loads, the maximum effect on the material endurance is exerted by the calculated ones: the amplitude of the stress cycle, the maximum stress of the cycle and the range of stress fluctuations in the cycle, both separately and jointly. Comparative analysis of the results of calculating the stresses under cyclic temperature loading according to 3 hypotheses showed that the values of the calculated stresses are the closest to the maximum cycle stress or to the cycle stress amplitude.https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2021/%E2%84%966%20(180)%20(%D0%9E%D0%9D%D0%92)/16-20%20%D0%9B%D0%B5%D1%81%D0%BD%D1%8F%D0%BA%20%D0%98.%20%D0%AE.,%20%D0%A1%D0%BE%D0%BA%D0%BE%D0%BB%D0%BE%D0%B2%D1%81%D0%BA%D0%B8%D0%B9%20%D0%97.%20%D0%9D.,%20%D0%93%D0%B0%D0%B2%D1%80%D0%B8%D0%BB%D0%B5%D0%BD%D0%BA%D0%BE%20%D0%A1.%20%D0%92..pdfendurancetemperature cycledeformationscrackslow-cycle fatigue
spellingShingle I. Yu. Lesnyak
Z. N. Sokolovskiy
S. V. Gavrilenko
The analysis of structural fatigue under cyclic temperature loads
Омский научный вестник
endurance
temperature cycle
deformations
cracks
low-cycle fatigue
title The analysis of structural fatigue under cyclic temperature loads
title_full The analysis of structural fatigue under cyclic temperature loads
title_fullStr The analysis of structural fatigue under cyclic temperature loads
title_full_unstemmed The analysis of structural fatigue under cyclic temperature loads
title_short The analysis of structural fatigue under cyclic temperature loads
title_sort analysis of structural fatigue under cyclic temperature loads
topic endurance
temperature cycle
deformations
cracks
low-cycle fatigue
url https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2021/%E2%84%966%20(180)%20(%D0%9E%D0%9D%D0%92)/16-20%20%D0%9B%D0%B5%D1%81%D0%BD%D1%8F%D0%BA%20%D0%98.%20%D0%AE.,%20%D0%A1%D0%BE%D0%BA%D0%BE%D0%BB%D0%BE%D0%B2%D1%81%D0%BA%D0%B8%D0%B9%20%D0%97.%20%D0%9D.,%20%D0%93%D0%B0%D0%B2%D1%80%D0%B8%D0%BB%D0%B5%D0%BD%D0%BA%D0%BE%20%D0%A1.%20%D0%92..pdf
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