Development of An Effective Inspection and Maintenance Strategy based on Rolling Contact Surface Crack Propagation Analysis
| dc.contributor.advisor | Habtamu, Tkubet (Mr.) | |
| dc.contributor.author | Iyoel, Chuchu | |
| dc.date.accessioned | 2019-01-23T13:07:56Z | |
| dc.date.accessioned | 2023-11-04T15:16:43Z | |
| dc.date.available | 2019-01-23T13:07:56Z | |
| dc.date.available | 2023-11-04T15:16:43Z | |
| dc.date.issued | 2017 | |
| dc.description.abstract | The issue of railway rail damage can‟t be seen easily and it requires attention and researching because most railway accidents are caused by the wheel/rail damage. The aim of this paper is to develop an effective inspection and maintenance strategy based on rolling contact surfaces crack propagation analyse. This will help to prevent the occurrence of rail failure by taking the required action at the right time, and extend the rail life expectancy, reduce the rail maintenance work and its cost. The frequency of rail inspection tends to vary from one railroad to another, yet it is usually based on either time or traffic tonnage. Railroad companies have evolved their rail inspection schedules empirically based on long field experience. Rail defect management refers to the development and implementation of strategies to control the risk of rail failure. The primary method to control the risk is a rail inspection through non-destructive evaluation and, is a replacement of rails based on the remedial action plan. This work has undertaken the study of fatigue cracks in rails using Finite element method (FEM) modelling and analytical solutions to provide rail inspectors for the quick assessment of the severity of surface breaking and embedded cracks in rails. The work does investigate crack propagation phenomena on the heads of rails. Based on the analysis results, the mechanism for remedial action is developed based on critical crack size at rail head, to help infrastructure manager‟s decision. Then, effective number of rail inspection frequency is determined as three times a year to prevent the occurrence of rail failure by taking the required action at the right time, and extend the rail life expectancy, reduce the rail maintenance work and its cost. Finally, appropriate rail inspection and maintenance strategy model (flowchart) is adopted for Ethiopian railway industry. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/123456789/15995 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Finite element method | en_US |
| dc.subject | linear elastic fracture mechanics | en_US |
| dc.subject | stress intensity factor | en_US |
| dc.subject | inspection | en_US |
| dc.subject | maintenance strategy | en_US |
| dc.title | Development of An Effective Inspection and Maintenance Strategy based on Rolling Contact Surface Crack Propagation Analysis | en_US |
| dc.type | Thesis | en_US |