Experimental studies on the effect of overload on fatigue crack growth |
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| Authors: | Yang Bingxian |
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| Affiliation: | (1) Beijing Institute of Aeronautics and Astronautics, Beijing, China |
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| Abstract: | The fatigue crack growth behavior resulting from a single overload is investigated. In order to clarify the mechanism of overload on fatigue crack growth, the processes of crack closure and opening and their stress levels are monitored by strain gages placed on the back surface of specimens, and the fracture surface morphologies are examined by the microfractography. Experimental results may be used to explain quantitatively the mechanisms of retardation and delayed retardation after a single overload. |
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| Keywords: | overload, retardation fracture surface morphology microfractography void dimple striation quasi-cleavage effective stress intensity factor range |
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