Contact stress analysis and fatigue life prediction for a cam-roller follower system
<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...
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| Format: | Others |
| Language: | en |
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Virginia Tech
2014
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| Online Access: | http://hdl.handle.net/10919/44615 http://scholar.lib.vt.edu/theses/available/etd-09052009-041041/ |
| Summary: | <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 |
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