On improvement of calculations for strength of rails
From the middle of the last century, beginning with the works of Professor M. F. Verigo, rejection of yield strength at static loading and transition to the fatigue strength under cyclic loading were accepted and made as the main conceptual provisions in calculations of rails for strength when choos...
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| Format: | Article |
| Language: | Russian |
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Joint Stock Company «Railway Scientific and Research Institute»
2016-08-01
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| Series: | Вестник Научно-исследовательского института железнодорожного транспорта |
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| Online Access: | https://www.journal-vniizht.ru/jour/article/view/99 |
| _version_ | 1797872336222814208 |
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| author | E. A. Shur |
| author_facet | E. A. Shur |
| author_sort | E. A. Shur |
| collection | DOAJ |
| description | From the middle of the last century, beginning with the works of Professor M. F. Verigo, rejection of yield strength at static loading and transition to the fatigue strength under cyclic loading were accepted and made as the main conceptual provisions in calculations of rails for strength when choosing allowable stress levels. Thus, calculation of rails for the strength should be carried out as all strength calculations of machine parts under loadings, variable in time. Further progress in the development of methods for calculating the strength of rails under varying stresses correspond with the implementation in practice of calculations of probability concepts. In article three types of calculations of rails for strength, having the greatest practical value now, are considered namely: calculation of cyclic strength of rails at prevention of formation of fatigue cracks in a foot and a neck; calculation of cyclic contact strength at prevention within a resource (or probability regulations) of formations of cracks of contact fatigue in a head of regulated shape and size, and also calculation of durability of rails taking into account existence of fatigue cracks at prevention of complete brittle fracture of all section. The main attention is paid to determination of allowable stresses when calculating cyclic strength, as well as to the accounting of a large-scale factor when calculating cyclic contact strength, and also to determination of duration of development of fatigue cracks and their critical size when calculating durability. The existing normative documents concerning calculations of rails on strength have become outdated and demand development of new ones. |
| first_indexed | 2024-04-10T00:57:08Z |
| format | Article |
| id | doaj.art-301dcd35132b4a3a8764d15fbf55ea67 |
| institution | Directory Open Access Journal |
| issn | 2223-9731 2713-2560 |
| language | Russian |
| last_indexed | 2024-04-10T00:57:08Z |
| publishDate | 2016-08-01 |
| publisher | Joint Stock Company «Railway Scientific and Research Institute» |
| record_format | Article |
| series | Вестник Научно-исследовательского института железнодорожного транспорта |
| spelling | doaj.art-301dcd35132b4a3a8764d15fbf55ea672023-03-13T10:14:31ZrusJoint Stock Company «Railway Scientific and Research Institute»Вестник Научно-исследовательского института железнодорожного транспорта2223-97312713-25602016-08-0175420721610.21780/2223-9731-2016-75-4-207-21699On improvement of calculations for strength of railsE. A. Shur0Акционерное общество «Научно-исследовательский институт железнодорожного транспорта» (АО «ВНИИЖТ»)From the middle of the last century, beginning with the works of Professor M. F. Verigo, rejection of yield strength at static loading and transition to the fatigue strength under cyclic loading were accepted and made as the main conceptual provisions in calculations of rails for strength when choosing allowable stress levels. Thus, calculation of rails for the strength should be carried out as all strength calculations of machine parts under loadings, variable in time. Further progress in the development of methods for calculating the strength of rails under varying stresses correspond with the implementation in practice of calculations of probability concepts. In article three types of calculations of rails for strength, having the greatest practical value now, are considered namely: calculation of cyclic strength of rails at prevention of formation of fatigue cracks in a foot and a neck; calculation of cyclic contact strength at prevention within a resource (or probability regulations) of formations of cracks of contact fatigue in a head of regulated shape and size, and also calculation of durability of rails taking into account existence of fatigue cracks at prevention of complete brittle fracture of all section. The main attention is paid to determination of allowable stresses when calculating cyclic strength, as well as to the accounting of a large-scale factor when calculating cyclic contact strength, and also to determination of duration of development of fatigue cracks and their critical size when calculating durability. The existing normative documents concerning calculations of rails on strength have become outdated and demand development of new ones.https://www.journal-vniizht.ru/jour/article/view/99рельсырасчеты на прочностьусталостьконтактная усталостьживучесть |
| spellingShingle | E. A. Shur On improvement of calculations for strength of rails Вестник Научно-исследовательского института железнодорожного транспорта рельсы расчеты на прочность усталость контактная усталость живучесть |
| title | On improvement of calculations for strength of rails |
| title_full | On improvement of calculations for strength of rails |
| title_fullStr | On improvement of calculations for strength of rails |
| title_full_unstemmed | On improvement of calculations for strength of rails |
| title_short | On improvement of calculations for strength of rails |
| title_sort | on improvement of calculations for strength of rails |
| topic | рельсы расчеты на прочность усталость контактная усталость живучесть |
| url | https://www.journal-vniizht.ru/jour/article/view/99 |
| work_keys_str_mv | AT eashur onimprovementofcalculationsforstrengthofrails |