Theories
Article Abstract:
The multiaxial non-proportional cycle counting method can predict the fatigue life of materials under accumulated fatigue damage multiaxial load with randomly variable amplitude. The theory behind this method is based on the critical plane concept and is similar to the theory behind the damage searching method. The method uses a new counting algorithm for multiaxial random loading. It is more effective than the damage searching method in that it takes into account the change of path of fatigue crack growth.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1996
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A method for determining the elastic-plastic response ahead of a notch tip
Article Abstract:
Two commonly used engineering methods for determining the response at a notch tip were examined if they could also be applied to evaluate the elastic-plastic response ahead of a notch tip. The results showed that both methods significantly underestimated the stress-strain distribution ahead of a notch tip. An analytical method was developed that took into account the effects of stress redistribution induced by notch plasticity and the in-plane and through-thickness constraints near the notch root.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1999
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Comparison with experimental results
Article Abstract:
Wang and Brown's method is more accurate and efficient than Bannantine and Socie's method in predicting the fatigue life of steels under multiaxial random loading. The latter method requires 180 cycle counting and damage evaluation passes to calculate fatigue damage whereas the latter method requires only one counting pass for each loading block. Sequential loading tests with pressurized cylinder rig made of En15R steel and stainless steel at high temperature and medium steel at room temperature.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1996
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