Rolling Contact Fatigue In Wheel Rail Contact
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Mechanics And Fatigue In Wheel Rail Contact
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Author : S.L. Grassie
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Mechanics And Fatigue In Wheel Rail Contact written by S.L. Grassie and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Technology & Engineering categories.
These proceedings demonstrate the increasing interest and importance of contact mechanics and wear to the railway industry. The 27 contributions succeed in sustaining a balance between mechanics and metallurgy, theory and practice, and will be of considerable interest to those engaged in research, as well as practising engineers.
Rolling Contact Fatigue In Wheel Rail Contact
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Author : Lindsey Ann Smith
language : en
Publisher:
Release Date : 2007
Rolling Contact Fatigue In Wheel Rail Contact written by Lindsey Ann Smith and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Rolling Contact Fatigue Of Wheel Rail Systems
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Author : Anders Ekberg
language : en
Publisher:
Release Date : 1995
Rolling Contact Fatigue Of Wheel Rail Systems written by Anders Ekberg and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
Reduction Of Rolling Contact Fatigue Through The Control Of The Wheel Wear Shape
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Author : Ulrich Spangenberg
language : en
Publisher:
Release Date : 2016
Reduction Of Rolling Contact Fatigue Through The Control Of The Wheel Wear Shape written by Ulrich Spangenberg and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Heavy haul railway operations permit the transport of huge volumes at lower cost than other modes of transport. The low cost can only be sustained if the maintenance costs associated with such railway operations are minimised. The maintenance costs are mainly driven by wheel and rail damage in the form of wear and rolling contact fatigue (RCF). Low wear rates in the wheel-rail interface have resulted in an increase in the prevalence of rail RCF, thereby increasing rail maintenance costs. The aim of this study is to develop an approach to reduce rail RCF on South Africa’s iron ore export line by managing the worn wheel shape. This approach is developed by evaluating wheel and rail profile shapes that contribute the most to RCF initiation, studying the influence of suspension stiffness and rail profile changes as well as a redesign of the wheel profile. The influence of wheel and rail profile shape features on the initiation of rolling contact fatigue (RCF) cracks was evaluated based on the results of multibody vehicle dynamics simulations. The damage index and surface fatigue index were used as two damage parameters to assess the influence of the different features. The damage parameters showed good agreement to one another and to in-field observations. The wheel and rail profile shape features showed a correlation to the predicted RCF damage. The RCF damage proved to be most sensitive to the position of hollow wear and thus bogie tracking. RCF initiation and crack growth can be reduced by eliminating unwanted shape features through maintenance and design and by improving bogie tracking. Two potential mitigation measures had been adapted from those published in literature to reduce RCF. The mitigation measures involved changes in suspension stiffness to spread wheel wear across the tread and the use of gauge corner relief rail profiles. These mitigation measures were evaluated by means of multibody dynamics and wear maintenance costs. These mitigation measures, however, did not prove to be successful in reducing RCF initiation while maintaining a low wheel wear rate. The current operating conditions on South Africa’s iron ore line, although still not optimal overall, were found to be better in terms of their wear and RCF performance than the two proposed RCF mitigation measures. Based on the finding of the study on two RCF mitigation measures it was recommended that a conformal wheel profile be developed to spread the wheel wear across the tread to reduce the occurrence and propagation of RCF cracks, while still maintaining low wheel wear rates. A comparative study of this new wheel profile design and the current wheel profile design was therefore performed using multibody dynamics simulation together with numerical wheel wear and RCF predictions. The advantages of the conformal wheel profile design were illustrated by evaluating the worn shape and resulting kinematic behaviour of the conformal design. The conformal design had a steadier equivalent conicity progression and a smaller conicity range compared with the current wheel profile design over the wheel’s wear life. The combination of a conformal wheel profile design with 2 mm hollow wear and inadequate adherence to grinding tolerances often result in two-point contact, thereby increasing the probability of RCF initiation. The conformal wheel profile design was shown to have many wear and RCF benefits compared with the current wheel profile design. However, implementation of such a conformal wheel profile must be accompanied by improved rail grinding practices to ensure rail profile compliance. Based on these findings an approach is proposed where the conformal wheel profile design together with improved compliance of the in-service rail profiles to the target rail profile are implemented. This has the potential to reduce RCF initiation on South Africa’s iron ore export line.
Understanding Of Rail Wheel Fatigue
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Author : Mohammed Miraj Hayat
language : en
Publisher: LAP Lambert Academic Publishing
Release Date : 2012
Understanding Of Rail Wheel Fatigue written by Mohammed Miraj Hayat and has been published by LAP Lambert Academic Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
The fatigue problem of rail road wheel which is often referred as rolling contact fatigue is caused by repeated contact stress during the rolling motion. This rolling contact fatigue of rail wheel may cause severe damage to rail wheel, rail, train suspension and sometimes derailment of train. Proper prediction of rail wheel fatigue life and incorporation of appropriate measures to avoid rail wheel are very important issue to be addressed. the proper understanding of underlined mechanism of rolling contact fatigue requires detailed knowledge of interaction of wheel and rail.
Atti Del Workshop Igf Rolling Contact Fatigue Applications And Developments
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Author :
language : en
Publisher: Gruppo Italiano Frattura
Release Date :
Atti Del Workshop Igf Rolling Contact Fatigue Applications And Developments written by and has been published by Gruppo Italiano Frattura this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Encyclopedia Of Tribology
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Author : Q. Jane Wang
language : en
Publisher: Springer
Release Date : 2013-09-26
Encyclopedia Of Tribology written by Q. Jane Wang and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-09-26 with Technology & Engineering categories.
TRIBOLOGY – the study of friction, wear and lubrication – impacts almost every aspect of our daily lives. The Springer Encyclopedia of Tribology is an authoritative and comprehensive reference covering all major aspects of the science and engineering of tribology that are relevant to researchers across all engineering industries and related scientific disciplines. This is the first major reference that brings together the science, engineering and technological aspects of tribology of this breadth and scope in a single work. Developed and written by leading experts in the field, the Springer Encyclopedia of Tribology covers the fundamentals as well as advanced applications across material types, different length and time scales, and encompassing various engineering applications and technologies. Exciting new areas such as nanotribology, tribochemistry and biotribology have also been included. As a six-volume set, the Springer Encyclopedia of Tribology comprises 1630 entries written by authoritative experts in each subject area, under the guidance of an international panel of key researchers from academia, national laboratories and industry. With alphabetically-arranged entries, concept diagrams and cross-linking features, this comprehensive work provides easy access to essential information for both researchers and practicing engineers in the fields of engineering (aerospace, automotive, biomedical, chemical, electrical, and mechanical) as well as materials science, physics, and chemistry.
Fundamentals Of Rail Wheel Interaction
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Author : Andrew David Arnall
language : en
Publisher:
Release Date : 2019
Fundamentals Of Rail Wheel Interaction written by Andrew David Arnall and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Wheel Rail Interface Handbook
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Author : R. Lewis
language : en
Publisher: Elsevier
Release Date : 2009-09-25
Wheel Rail Interface Handbook written by R. Lewis and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-09-25 with Technology & Engineering categories.
Many of the engineering problems of particular importance to railways arise at interfaces and the safety-critical role of the wheel/rail interface is widely acknowledged. Better understanding of wheel/rail interfaces is therefore critical to improving the capacity, reliability and safety of the railway system. Wheel-rail interface handbook is a one-stop reference for railway engineering practitioners and academic researchers. Part one provides the fundamentals of contact mechanics, wear, fatigue and lubrication as well as state-of-the-art research and emerging technologies related to the wheel/rail interface and its management. Part two offers an overview of industrial practice from several different regions of the world, thereby providing an invaluable international perspective with practitioners’ experience of managing the wheel/rail interface in a variety of environments and circumstances. This comprehensive volume will enable practising railway engineers, in whatever discipline of railway engineering – infrastructure, vehicle design and safety, and so on – to enhance their understanding of wheel/rail issues, which have a major influence on the running of a reliable, efficient and safe railway. One-stop reference on the important topic of wheel rail-interfaces Presents the fundamentals of contact mechanics, wear, fatigue and lubrication Examines state-of-the-art research and emerging technologies related to wheel-rail interface and its management
A Fatigue Life Model For General Rolling Contact With Application To Wheel Rail Damage
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Author : Anders Ekberg
language : en
Publisher:
Release Date : 1995
A Fatigue Life Model For General Rolling Contact With Application To Wheel Rail Damage written by Anders Ekberg and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.