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This content will become publicly available on February 7, 2019

Title: A rolling-sliding bench test for investigating rear axle lubrication

An automotive rear axle is composed of a set of hypoid gears, whose contact surfaces experience a complex combination of rolling contact fatigue damage and sliding wear. Full-scale rear axle dynamometer tests are used in the industry for efficiency and durability assessment. Here, this study developed a bench-scale rolling-sliding test protocol by simulating the contact pressure, oil temperature, and lubrication regime experienced in a dynamometer duty cycle test. Initial bench results have demonstrated the ability of generating both rolling contact-induced micropitting and sliding wear and the feasibility of investigating the impact of slide-to-roll ratio, surface roughness, test duration, and oil temperature on the friction behavior, vibration noise, and surface damage. Finally, this bench test will allow studying candidate rear axle lubricants and materials under relevant conditions.
 [1] ; ORCiD logo [1] ;  [2] ;  [2] ;  [1] ; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  2. General Motors, Detroit, MI (United States)
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Tribology International
Additional Journal Information:
Journal Volume: 121; Journal Issue: C; Journal ID: ISSN 0301-679X
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Country of Publication:
United States
42 ENGINEERING; Rear axle; Hypoid gear; Lubrication; Contact fatigue
OSTI Identifier: