Computational Technology Resources - CCP

P.B. Molyneux-Berry, A.J. Bevan, S.Y. Zhang, S. Kabra, "Residual Stress in Wheels: Comparison of Neutron Diffraction and Ultrasonic Methods with Trends in RCF", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 112, 2014. doi:10.4203/ccp.104.112

Keywords: railway wheel, neutron diffraction, residual stress.

Summary

The critical damage mechanism on many GB passenger train wheels is rolling contact fatigue (RCF) cracking in the rim. Evidence from field observations suggests that RCF damage occurs much more quickly as the wheelsets near the end of their life. Wheel manufacturing processes induce a compressive hoop stress in the wheel rim; variations in residual stress through the life of a wheel may influence the observed RCF damage rates. This paper describes experiments to measure residual stresses in new and used wheel rims to identify whether this could be a significant factor, and compares the findings from neutron diffraction and ultrasonic birefringence methods. The scope goes beyond previous applications of neutron diffraction to railway wheels and identifies key considerations for future testing. Assuming that the as-manufactured stress distribution was similar for all three wheels tested, it is found that the stresses are redistributed within the wheel rim during its life as material is removed and plastic flow occurs. However, the hoop stress near the running surface remains compressive and may not have a large influence on the RCF damage rates.

purchase the full-text of this paper (price £20)

go to the previous paper
go to the next paper
return to the table of contents
return to the book description
purchase this book (price £65 +P&P)

	Computational & Technology Resources an online resource for computational, engineering & technology publications
	not logged in - login
Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 104 PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 112 Residual Stress in Wheels: Comparison of Neutron Diffraction and Ultrasonic Methods with Trends in RCF P.B. Molyneux-Berry¹, A.J. Bevan¹, S.Y. Zhang² and S. Kabra² ¹Institute of Railway Research, University of Huddersfield, United Kingdom ²ISIS, Science & Technology Facilities Council, United Kingdom doi:10.4203/ccp.104.112 purchase the full-text of this paper Full Bibliographic Reference for this paper P.B. Molyneux-Berry, A.J. Bevan, S.Y. Zhang, S. Kabra, "Residual Stress in Wheels: Comparison of Neutron Diffraction and Ultrasonic Methods with Trends in RCF", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 112, 2014. doi:10.4203/ccp.104.112 Keywords: railway wheel, neutron diffraction, residual stress. Summary The critical damage mechanism on many GB passenger train wheels is rolling contact fatigue (RCF) cracking in the rim. Evidence from field observations suggests that RCF damage occurs much more quickly as the wheelsets near the end of their life. Wheel manufacturing processes induce a compressive hoop stress in the wheel rim; variations in residual stress through the life of a wheel may influence the observed RCF damage rates. This paper describes experiments to measure residual stresses in new and used wheel rims to identify whether this could be a significant factor, and compares the findings from neutron diffraction and ultrasonic birefringence methods. The scope goes beyond previous applications of neutron diffraction to railway wheels and identifies key considerations for future testing. Assuming that the as-manufactured stress distribution was similar for all three wheels tested, it is found that the stresses are redistributed within the wheel rim during its life as material is removed and plastic flow occurs. However, the hoop stress near the running surface remains compressive and may not have a large influence on the RCF damage rates. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
Back to top	©Civil-Comp Limited 2023 - terms & conditions