Analysis of the initiation and propagation of fatigue cracks in the CRTS II slab track inter-layer using FE-SAFE and XFEM
| العنوان: | Analysis of the initiation and propagation of fatigue cracks in the CRTS II slab track inter-layer using FE-SAFE and XFEM |
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| المؤلفون: | Qi-hang Li, Yan-rong Zhang, Hong Xiao, Mahantesh M Nadakatti, Feng Jin |
| المصدر: | Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 233:678-690 |
| بيانات النشر: | SAGE Publications, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | business.industry, Mechanical Engineering, Inter layer, 02 engineering and technology, Structural engineering, 021001 nanoscience & nanotechnology, Track (rail transport), 020303 mechanical engineering & transports, CRTS, 0203 mechanical engineering, Slab, 0210 nano-technology, business, Geology, Extended finite element method |
| الوصف: | In this study, a novel method for analysing inter-layer defects in slab tracks was proposed, based on fatigue analysis and the extended finite element method. The inter-layer gap of China Railway Track System (CRTS) II slab tracks was analysed. First, a finite element model was established to analyse the stresses in mortar layer under train and temperature loading. Secondly, the results of the stress analysis of the mortar layer were assessed using a fatigue analysis software for calculating the fatigue life of the mortar layer and the areas that fail first. Finally, in an extended finite element analysis, an initial gap was applied over the area that fails first, as determined through the fatigue analysis of the mortar layer. The patterns of the gaps at the ends, in the central part of the edge, and at the corner of the inter-mortar layer were observed and compared. Results show that the new method, which combines fatigue analysis and the extended finite element method, can address the discontinuity problem of the inter-layer slab defects in ballastless tracks, enabling the development process to be simulated. The rate at which the area of gapping increases can be used to characterize the development of the inter-layer gap in slab tracks. |
| تدمد: | 2041-3017 0954-4097 |
| DOI: | 10.1177/0954409718805296 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::d28b7d021f29df7044b19fb8e7cc720e https://doi.org/10.1177/0954409718805296 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........d28b7d021f29df7044b19fb8e7cc720e |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20413017 09544097 |
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| DOI: | 10.1177/0954409718805296 |