Type of Document Master's Thesis Author Girardin, Benoit URN etd-09052009-041041 Title Contact stress analysis and fatigue life prediction for a cam-roller follower system Degree Master of Science Department Engineering Science and Mechanics Advisory Committee
Advisor Name Title Landgraf, Ronald W. Committee Chair Eiss, Norman S. Jr. Committee Member Loos, Alfred C. Committee Member Meirovitch, Leonard Committee Member Keywords
- fatigue life prediction
Date of Defense 1994-06-05 Availability restricted Abstract
An analytical treatment of the fatigue performance of a cam-roller followler system as influenced by residual stresses induced by grinding, is developed. An approach based on an extended Hertzian analysis is used to determine the 3-D contact stress fields, which are then combined by elastic superposition with the residual stress fields. These residual stresses were measured previously by the x-ray diffraction technique and represent a range of grinding protocols from mild to abusive.
The maximum cyclic component, generally occurring subsurface, is then identified in terms of an effective stress amplitude and mean which are used with a fatigue damage model to predict fatigue crack initiation. Results, pending experimental confirmation, appear reasonable and provide a useful basis for optimizing cam performance in terms of manufacturing and design parameters.
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