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Investigation of Low-Cycle Bending Fatigue of AISI 9310 Steel Spur GearsAn investigation of the low-cycle bending fatigue of spur gears made from AISI 9310 gear steel was completed. Tests were conducted using the single-tooth bending method to achieve crack initiation and propagation. Tests were conducted on spur gears in a fatigue test machine using a dedicated gear test fixture. Test loads were applied at the highest point of single tooth contact. Gear bending stresses for a given testing load were calculated using a linear-elastic finite element model. Test data were accumulated from 1/4 cycle to several thousand cycles depending on the test stress level. The relationship of stress and cycles for crack initiation was found to be semilogarithmic. The relationship of stress and cycles for crack propagation was found to be linear. For the range of loads investigated, the crack propagation phase is related to the level of load being applied. Very high loads have comparable crack initiation and propagation times whereas lower loads can have a much smaller number of cycles for crack propagation cycles as compared to crack initiation.
Document ID
20070022441
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Handschuh, Robert F.
(Army Research Lab. Cleveland, OH, United States)
Krantz, Timothy L.
(Army Research Lab. Cleveland, OH, United States)
Lerch, Bradley A.
(NASA Glenn Research Center Cleveland, OH, United States)
Burke, Christopher S.
(QSS Group, Inc. Cleveland, OH, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2007
Subject Category
Mechanical Engineering
Report/Patent Number
DETC2007-34095
Meeting Information
Meeting: 10th ASME International Power Transmission and Gearing Conference
Location: Las Vegas, NV
Country: United States
Start Date: September 4, 2007
End Date: September 7, 2007
Sponsors: American Society of Mechanical Engineers
Distribution Limits
Public
Copyright
Other

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