An explanation for the observed difference between the values of the long-life, fatigue-notch strength-reduction factor (Kf) and the elastic stress concentration factor based on the influence of biaxial-notch root stresses is presented for a limited class of problems for which the local stresses are elastic. Results of three-dimensional linear elasticity solutions for notch stresses are reviewed and then used in conjunction with a biaxial fatigue criterion suitable for elastic straining to predict values of Kf for a variety of notched components for which values have been experimentally determined. Comparison of actual and predicted values of Kf indicates a close correspondence suggesting that the influence of local biaxial stresses on the life to crack initiation of notched components is responsible for the reduced notch severity observed in many of the experimental investigations of long-life (fatigue) notch sensitivity.
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July 1977
Research Papers
Long-Life Notch Strength Reduction Due to Local Biaxial State of Stress
B. N. Leis,
B. N. Leis
Battelle’s Columbus Laboratories, Columbus, Ohio
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T. H. Topper
T. H. Topper
Department of Civil Engineering, University of Waterloo, Waterloo, Ontario, Canada
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B. N. Leis
Battelle’s Columbus Laboratories, Columbus, Ohio
T. H. Topper
Department of Civil Engineering, University of Waterloo, Waterloo, Ontario, Canada
J. Eng. Mater. Technol. Jul 1977, 99(3): 215-221 (7 pages)
Published Online: July 1, 1977
Article history
Received:
May 27, 1976
Revised:
September 28, 1976
Online:
August 17, 2010
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Leis, B. N., and Topper, T. H. (July 1, 1977). "Long-Life Notch Strength Reduction Due to Local Biaxial State of Stress." ASME. J. Eng. Mater. Technol. July 1977; 99(3): 215–221. https://doi.org/10.1115/1.3443522
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