Wear and crack initiation prediction of rail irregularity welding zone
In order to investigate the relation between abrasion and crack initiation in the welded zone of rails and axle weight and friction coefficient, through the field measurement of a large number of uneven weld zones, two kinds of typical weld zone uneven data were fitted, and two kinds of typical unev...
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| Format: | Article |
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Editorial Office of Journal of Mechanical Strength
2025-01-01
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| Series: | Jixie qiangdu |
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| Online Access: | http://www.jxqd.net.cn/thesisDetails#DOI:10.16579/j.issn.1001.9669.2025.01.016 |
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| author | LIN Fengtao WANG Zixu TAN Rongkai ZHANG Zihao DU Ruiting SHI Zhiqin |
| author_facet | LIN Fengtao WANG Zixu TAN Rongkai ZHANG Zihao DU Ruiting SHI Zhiqin |
| author_sort | LIN Fengtao |
| collection | DOAJ |
| description | In order to investigate the relation between abrasion and crack initiation in the welded zone of rails and axle weight and friction coefficient, through the field measurement of a large number of uneven weld zones, two kinds of typical weld zone uneven data were fitted, and two kinds of typical uneven wheel-rail contact finite element models of upper convex and lower concave weld zones were established. Combined with the friction work model and Archard wear theory, the maximum wear cross section of the welded zone was predicted, and the crack initiation life of the welded zone was predicted based on the Jiang-Sehitoglu model. It is found that with the increase of axle load, the abrasion rate of both the upper convex and lower concave weld zone increases, and the abrasion rate of the upper convex weld zone increases significantly when the axle load reaches 16 t, while the abrasion rate of the lower concave weld zone increases significantly when the axle load reaches 18 t. When the friction coefficient increases from 0.2 to 0.35, the maximal abrasion amount of the two types of weld zones of the upper convex and the lower concave is 1.93 mm and 1.08 mm, respectively. The abrasion rate of the upper convex type increases significantly at a friction coefficient of 0.3, while the abrasion rate of the lower concave type increases significantly at a coefficient of 0.35. When the axle load increases from 12 t to 18 t, the service life of the upper convex weld zone decreases less, while the service life of the lower concave weld zone decreases more. In addition, when the friction coefficient is increased from 0.2 to 0.35, its effect on the service life of the upper convex weld zone is significantly smaller than that of the axle load （12-18 t）. However, when the friction coefficient is increased from 0.2 to 0.35, the effect on the service life of the lower concave weld zone is comparable to that of the axle load （12-18 t）. The results show that with the increase of axle load and friction coefficient, the influence of concave irregularity on the life of rail welding zone is more significant. In the process of engineering maintenance, we should pay attention to the appearance of concave welding zone and mark and repair it in time. |
| format | Article |
| id | doaj-art-a6a307c74d27457a8482141c39a9e282 |
| institution | Kabale University |
| issn | 1001-9669 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Office of Journal of Mechanical Strength |
| record_format | Article |
| series | Jixie qiangdu |
| spelling | doaj-art-a6a307c74d27457a8482141c39a9e2822025-01-25T19:00:13ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692025-01-014714615469542357Wear and crack initiation prediction of rail irregularity welding zoneLIN FengtaoWANG ZixuTAN RongkaiZHANG ZihaoDU RuitingSHI ZhiqinIn order to investigate the relation between abrasion and crack initiation in the welded zone of rails and axle weight and friction coefficient, through the field measurement of a large number of uneven weld zones, two kinds of typical weld zone uneven data were fitted, and two kinds of typical uneven wheel-rail contact finite element models of upper convex and lower concave weld zones were established. Combined with the friction work model and Archard wear theory, the maximum wear cross section of the welded zone was predicted, and the crack initiation life of the welded zone was predicted based on the Jiang-Sehitoglu model. It is found that with the increase of axle load, the abrasion rate of both the upper convex and lower concave weld zone increases, and the abrasion rate of the upper convex weld zone increases significantly when the axle load reaches 16 t, while the abrasion rate of the lower concave weld zone increases significantly when the axle load reaches 18 t. When the friction coefficient increases from 0.2 to 0.35, the maximal abrasion amount of the two types of weld zones of the upper convex and the lower concave is 1.93 mm and 1.08 mm, respectively. The abrasion rate of the upper convex type increases significantly at a friction coefficient of 0.3, while the abrasion rate of the lower concave type increases significantly at a coefficient of 0.35. When the axle load increases from 12 t to 18 t, the service life of the upper convex weld zone decreases less, while the service life of the lower concave weld zone decreases more. In addition, when the friction coefficient is increased from 0.2 to 0.35, its effect on the service life of the upper convex weld zone is significantly smaller than that of the axle load （12-18 t）. However, when the friction coefficient is increased from 0.2 to 0.35, the effect on the service life of the lower concave weld zone is comparable to that of the axle load （12-18 t）. The results show that with the increase of axle load and friction coefficient, the influence of concave irregularity on the life of rail welding zone is more significant. In the process of engineering maintenance, we should pay attention to the appearance of concave welding zone and mark and repair it in time.http://www.jxqd.net.cn/thesisDetails#DOI:10.16579/j.issn.1001.9669.2025.01.016Railway engineeringWheel-rail relationWear predictionCrack initiation prediction |
| spellingShingle | LIN Fengtao WANG Zixu TAN Rongkai ZHANG Zihao DU Ruiting SHI Zhiqin Wear and crack initiation prediction of rail irregularity welding zone Jixie qiangdu Railway engineering Wheel-rail relation Wear prediction Crack initiation prediction |
| title | Wear and crack initiation prediction of rail irregularity welding zone |
| title_full | Wear and crack initiation prediction of rail irregularity welding zone |
| title_fullStr | Wear and crack initiation prediction of rail irregularity welding zone |
| title_full_unstemmed | Wear and crack initiation prediction of rail irregularity welding zone |
| title_short | Wear and crack initiation prediction of rail irregularity welding zone |
| title_sort | wear and crack initiation prediction of rail irregularity welding zone |
| topic | Railway engineering Wheel-rail relation Wear prediction Crack initiation prediction |
| url | http://www.jxqd.net.cn/thesisDetails#DOI:10.16579/j.issn.1001.9669.2025.01.016 |
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