A study is conducted to determine the plastic energy absorbed by a material subjected to cyclic loading during the crack propagation stage. The analysis is based on Liu’s elastoplastic solution for calculating the plastic energy around the crack tip combined with a modified crack propagation law. The plastic energy per cycle Δw is found to be dependent upon the fatigue crack length and therefore varies with the number of applied cycles. The mean value of this energy corresponds to the plastic energy obtained by measuring the area within the stress-strain hysteresis loops of the material under repeated loading. If fatigue damage is based on plastic energy, the trend of variation of Δw with the applied cycles in the present analysis shows that the application of the linear damage rule (such as Miner’s law) should be more successful in the low-cycle region than in the high-cycle region. This is consistent with experimental data.
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April 1975
Research Papers
Plastic Energy Required for Fatigue Failure of Specimens Containing Cracks
Thang Bui-Quoc,
Thang Bui-Quoc
Section of Applied Mechanics, Department of Mechanical Engineering, Ecole Polytechnique, Montreal, Canada
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Andre Biron
Andre Biron
Section of Applied Mechanics, Department of Mechanical Engineering, Ecole Polytechnique, Montreal, Canada
Search for other works by this author on:
Thang Bui-Quoc
Section of Applied Mechanics, Department of Mechanical Engineering, Ecole Polytechnique, Montreal, Canada
Andre Biron
Section of Applied Mechanics, Department of Mechanical Engineering, Ecole Polytechnique, Montreal, Canada
J. Eng. Mater. Technol. Apr 1975, 97(2): 172-178 (7 pages)
Published Online: April 1, 1975
Article history
Received:
May 14, 1973
Revised:
August 21, 1974
Online:
August 17, 2010
Citation
Bui-Quoc, T., and Biron, A. (April 1, 1975). "Plastic Energy Required for Fatigue Failure of Specimens Containing Cracks." ASME. J. Eng. Mater. Technol. April 1975; 97(2): 172–178. https://doi.org/10.1115/1.3443278
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