THE INFLUENCE OF NOTCH PLASTICITY ON SHORT FATIGUE CRACK BEHAVIOUR |
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| Authors: | H Y Ahmad E R de los Rios J R Yates |
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| Affiliation: | SIRIUS, Department of Mechanical and Process Engineering, University of Sheffield, Sheffield, S1 3JD, U.K. |
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| Abstract: | Abstract— A study has been made of fatigue crack formation and growth at the root of different notch profiles in a structural steel subjected to fully reversed tension-compression loading. The scale of stage I microstructural crack growth at notches decreased with increasing notch root strain and was comparable to the size of stage I cracks in shallow hourglass profile specimens at the same strain. Stage II crack growth rates were faster within the notch plastic field than in the elastic stress field of the bulk material. |
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