An integrated computational-experimental approach for prediction of total fatigue life applied to a uniaxial stress state is developed. The approach consists of the following elements: (1) development of a vibration based fatigue testing procedure to achieve low cost bending fatigue experiments and (2) development of a life prediction and estimation implementation scheme for calculating effective fatigue cycles. A series of fully reversed bending fatigue tests were carried out using a vibration-based testing procedure to investigate the effects of bending stress on fatigue limit. The results indicate that the fatigue limit for 6061-T6 aluminum is approximately 20% higher than the respective limit in fully reversed tension-compression (axial). To validate the experimental observations and further evaluate the possibility of prediction of fatigue life, an improved high cycle fatigue criterion has been developed, which allows one to systematically determine the fatigue life based on the amount of energy loss per fatigue cycle. A comparison between the prediction and the experimental results was conducted and shows that the criterion is capable of providing accurate fatigue life prediction.
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e-mail: shen.1@osu.edu
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January 2007
Technical Papers
Development of an Improved High Cycle Fatigue Criterion
Onome Scott-Emuakpor,
Onome Scott-Emuakpor
Department of Mechanical Engineering,
The Ohio State University
, Columbus, OH 43210
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M.-H. Herman Shen,
M.-H. Herman Shen
Department of Mechanical Engineering,
e-mail: shen.1@osu.edu
The Ohio State University
, Columbus, OH 43210
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Tommy George,
Tommy George
Air Force Research Laboratory
, Wright-Patterson AFB, OH 45433
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Charles J. Cross,
Charles J. Cross
Air Force Research Laboratory
, Wright-Patterson AFB, OH 45433
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Jeffrey Calcaterra
Jeffrey Calcaterra
Air Force Research Laboratory
, Wright-Patterson AFB, OH 45433
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Onome Scott-Emuakpor
Department of Mechanical Engineering,
The Ohio State University
, Columbus, OH 43210
M.-H. Herman Shen
Department of Mechanical Engineering,
The Ohio State University
, Columbus, OH 43210e-mail: shen.1@osu.edu
Tommy George
Air Force Research Laboratory
, Wright-Patterson AFB, OH 45433
Charles J. Cross
Air Force Research Laboratory
, Wright-Patterson AFB, OH 45433
Jeffrey Calcaterra
Air Force Research Laboratory
, Wright-Patterson AFB, OH 45433J. Eng. Gas Turbines Power. Jan 2007, 129(1): 162-169 (8 pages)
Published Online: March 1, 2004
Article history
Received:
October 1, 2003
Revised:
March 1, 2004
Citation
Scott-Emuakpor, O., Shen, M. H., George, T., Cross, C. J., and Calcaterra, J. (March 1, 2004). "Development of an Improved High Cycle Fatigue Criterion." ASME. J. Eng. Gas Turbines Power. January 2007; 129(1): 162–169. https://doi.org/10.1115/1.2360599
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