An Experimental Investigation of Bending Fatigue Initiation and Propagation Lives

[+] Author and Article Information
Avinash Singh

GM Gear Center, GM Powertrain, General Motors Corporation, 30240 Oak Creek Dr., M/C 481-3WX-101, Wixom, MI 48393e-mail: avinash.singh@gm.com

J. Mech. Des 123(3), 431-435 (May 01, 2000) (5 pages) doi:10.1115/1.1370496 History: Received May 01, 2000
Copyright © 2001 by ASME
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A typical S-N curve showing endurance limit
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Experimental setup of the bending fatigue fixture
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Schematic diagram of the experimental setup
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AE and load signals in the absence of AE activity
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AE signal due to crack propagation and the corresponding load signal
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AE signal due to crack initiation and the corresponding load signal
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Crack initiation, crack propagation and total life S-N curves for 4620M
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B10, B50, and B90 propagation S-N curves
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Comparison of the experimental B50 curves and the corresponding Manson’s approximate curves
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Comparison of the life predicted by Miner’s theory and the proposed two-stage method with experimental data




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