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An investigation of fatigue crack growth behavior of UIC 54 profile in high speed railway applications

Master of Science in Mechanical Engineering

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Bibliographic Details
Main Author: Gurubaran, Panerselvan
Other Authors: Wee, Fwen Hoon, Dr.
Format: Thesis
Language:English
Published: Universiti Malaysia Perlis (UniMAP) 2017
Subjects:
Fracture mechanics
Wheels and rails
Keretapi Tanah Melayu
Rolling contact fatigue (RCF)
Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/78023
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spelling my.unimap-780232023-03-07T00:57:54Z An investigation of fatigue crack growth behavior of UIC 54 profile in high speed railway applications Gurubaran, Panerselvan Wee, Fwen Hoon, Dr. Fracture mechanics Wheels and rails Keretapi Tanah Melayu Rolling contact fatigue (RCF) Master of Science in Mechanical Engineering The safety of wheels and rails is a greater concern for the Malaysian railways Keretapi Tanah Melayu and manufacturers of the railway network. The rolling contact fatigue (RCF) is a growing problem due to increase of the high speed train operation in Malaysia and increased of load cycle. The RCF is defined as a damage that occurred due to the change in the material microstructure which contributes to crack initiation followed by crack propagation under the influence of time-dependent. The typical cracks originating at the running surface is called as head check. The transverse cracks leading to the eventual fracture of the rail. As well as the crack growth rate is higher, it caused the crack to propagate faster and initiate the sudden rail failure at any time. In this study, numerical analysis of stress–strain characteristics of three dimensional (3D) wheel-rail contact was successfully carried out by ANSYS Workbench 14.5. Apart from that, this study focuses on the fatigue strength and fatigue crack growth (FCG) of UIC 54 profile. The fatigue strength and FCG study were coordinated with the dog-bone specimen (ASTM E-466- 15) and compact tension (CT) specimen (ASTM E-647-15), respectively. The S-N curve was plotted from 7 data of the dog-bone specimens to evaluate fatigue strength with a constant stress ratio 0.1, and variable in applied stress levels. In addition, the rail profile of UIC 54 fatigue strength was validated with simulation result by ANSYS Workbench 14.5. The simulation works were executed with dog-bone specimen model according to the experimental applied stress level. Meanwhile for FCG the study was conducted with the CT specimens with a variable in stress ratio of 0.1, 0.3 and applied loads of 16 kN and 13 kN. The material crack growth rate for UIC 54 profile is obtained from Paris– Erdogan relationship C and m. The maximum von–Mises stress result for the wheel and rail contact was obtained higher at rail gauge corner region and it’s exceed the yield strength limit (533 MPa) of UIC 54 profile. Furthermore, the equivalent plastic stress result reveals that most of the plastic deformation occurs at the rail gauge corner region, on the contrary almost very small plastic deformation occurs at the wheel. The overall hardness measurement for used rail obtained was 37.9 % greater than unused rail. The hardness value for P1 (used rail) indicates that rail gauge corner region was affected by high contact stresses and plastic strains. 2017 2023-03-07T00:57:54Z 2023-03-07T00:57:54Z Thesis http://dspace.unimap.edu.my:80/xmlui/handle/123456789/78023 en Universiti Malaysia Perlis (UniMAP) Universiti Malaysia Perlis (UniMAP) School of Mechatronic Engineering
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Fracture mechanics
Wheels and rails
Keretapi Tanah Melayu
Rolling contact fatigue (RCF)
spellingShingle Fracture mechanics
Wheels and rails
Keretapi Tanah Melayu
Rolling contact fatigue (RCF)
Gurubaran, Panerselvan
An investigation of fatigue crack growth behavior of UIC 54 profile in high speed railway applications
description Master of Science in Mechanical Engineering
author2 Wee, Fwen Hoon, Dr.
author_facet Wee, Fwen Hoon, Dr.
Gurubaran, Panerselvan
format Thesis
author Gurubaran, Panerselvan
author_sort Gurubaran, Panerselvan
title An investigation of fatigue crack growth behavior of UIC 54 profile in high speed railway applications
title_short An investigation of fatigue crack growth behavior of UIC 54 profile in high speed railway applications
title_full An investigation of fatigue crack growth behavior of UIC 54 profile in high speed railway applications
title_fullStr An investigation of fatigue crack growth behavior of UIC 54 profile in high speed railway applications
title_full_unstemmed An investigation of fatigue crack growth behavior of UIC 54 profile in high speed railway applications
title_sort investigation of fatigue crack growth behavior of uic 54 profile in high speed railway applications
publisher Universiti Malaysia Perlis (UniMAP)
publishDate 2017
url http://dspace.unimap.edu.my:80/xmlui/handle/123456789/78023
_version_ 1772813090574827520
score 13.222552

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