Contact stress analysis and fatigue life prediction for a cam-roller follower system

• Main Author: Girardin, Benoit
• Other Authors: Engineering Science and Mechanics
• Format: Others
• Language: en
• Published: Virginia Tech 2014
• Subjects: fatigue life prediction; LD5655.V855 1994.G573
• Online Access: http://hdl.handle.net/10919/44615; http://scholar.lib.vt.edu/theses/available/etd-09052009-041041/

<p>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.</p> <p> 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.</p> === Master of Science