Stress Field Evolution in a Ball Bearing Raceway Fatigue Spall (PREPRINT)

Abstract

The governing mechanisms of fatigue spall propagation in ball bearing inner raceways are investigated through the use of elastic-plastic finite element modeling, X-Ray Diffraction, and the visual inspection of fatigue spall cracks. The model simulates multiple ball impacts with a fatigue spall's edge in a 208 size ball bearing operating at 10,000 rpm. Ball impacts are shown to cause severe plastic deformation within the spall edge and induce tensile residual stresses. The finite element results are supported by X-Ray Diffraction measurements and the locations of cracks observed around the edge of a spall.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2009
Accession Number
ADA510362

Entities

People

  • Nagaraj K. Arakere
  • Nathan Branch
  • Nelson H. Forster
  • Vaughn Svendsen

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Ball Bearings
  • Bearings
  • Diffraction
  • Failure Mode And Effect Analysis
  • Fatigue Life
  • Materials
  • Measurement
  • Mechanics
  • Residual Stress
  • Stresses
  • Tensile Stress
  • Turbines
  • X Rays
  • X-Ray Diffraction

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Structural Health Monitoring of Composite Structures.