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EPSRC Reference: GR/L36178/01
Title: THE ROLE OF SURFACE DEFECTS IN ROLLING CONTACT FATIGUE
Principal Investigator: Dwyer-Joyce, Professor RS
Other Investigators:
Beynon, Professor JH
Researcher Co-Investigators:
Project Partners:
Tata Steel
Department: Mechanical Engineering
Organisation: University of Sheffield
Scheme: Standard Research (Pre-FEC)
Starts: 28 July 1997 Ends: 27 July 2000 Value (£): 132,499
EPSRC Research Topic Classifications:
Eng. Dynamics & Tribology
EPSRC Industrial Sector Classifications:
Manufacturing
Related Grants:
Panel History:  
Summary on Grant Application Form
Defects on the surfaces of contacting machine elements can act as stress raisers and lead to contact fatigue. The objective of this study is to model this stress raising effect in elastic and elastic/plastic contacts.Both elastic shakedown and repeated elastic-plastic finite element analysis will be used to model the behaviour of surfaces containing idealised defects. The associated stress fields will be interpreted using a fatigue crack initiation model (based on both a ductility exhaustion and a maximum stress approach). This will be used to develop criteria for defect severity.This problem of surface initiated fatigue is of importance in the wheel/rail industry. The project collaborators, British Steel Track Products (BSTP) will be carrying out a survey of rail defects, and provide specimens, as part of this study. It is intended to develop criteria for defect severity and hence define a link between rail manufacturing processes and product durability.
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Organisation Website: http://www.shef.ac.uk