Identification of the under-tie pad material characteristics for stress state reduction
| Autor: | Arthur de Oliveira Lima, Marcus S. Dersch, Josué César Bastos, Jacob M. Branson, J. Riley Edwards |
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| Rok vydání: | 2019 |
| Předmět: |
Ballast
Materials science business.industry Mechanical Engineering 0208 environmental biotechnology 0211 other engineering and technologies 02 engineering and technology Structural engineering 020801 environmental engineering Stress (mechanics) Track geometry Reduction (mathematics) business 021101 geological & geomatics engineering |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 234:1227-1237 |
| ISSN: | 2041-3017 0954-4097 |
| DOI: | 10.1177/0954409719890156 |
| Popis: | The degradation of ballast particles and concrete crossties in heavy-haul railroad tracks poses problems such as inhibiting proper drainage and disturbing track geometry. under-tie pads offer a solution to reduce crosstie–ballast stresses by improving load distribution through the track structure and reducing pressures on ballast particles and the crosstie surface. Despite the emergence of under-tie pads on heavy-haul corridors, optimal characteristics for the reduction of the tie–ballast stress state have not been defined in literature. In this research, several under-tie pad products and generic materials with various thicknesses and hardnesses were studied to identify appropriate properties of under-tie pad products for pressure distribution. The findings from this research provide an insight into how material characteristics influence the pressure mitigation performance of under-tie pads. Results from this study indicate that thickness is the most crucial metric determining under-tie pad performance in reducing ballast degradation; hardness and material type also have an effect, but to a lesser degree. |
| Databáze: | OpenAIRE |
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