| Download | - View accepted manuscript: Neutron diffraction measurements of residual stresses around a crack tip developed under variable-amplitude fatigue loadings (PDF, 1.2 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1111/j.1460-2695.2010.01490.x |
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| Author | Search for: Lee, S. Y.; Search for: Rogge, R. B.1; Search for: Choo, H.; Search for: Liaw, P. K. |
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| Affiliation | - National Research Council of Canada. NRC Canadian Neutron Beam Centre
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| Format | Text, Article |
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| Subject | crack tip; fatigue crack propagation; neutron diffraction; residual stress; variable-amplitude fatigue |
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| Abstract | The spatially resolved neutron-diffraction residual stress mappings were performed on five compact-tension (CT) specimens subjected to various variable-amplitude fatigue loadings (e.g. overload, underload and their mixed loads) during fatigue crack propagation. Three principal residual-stress components (i.e. longitudinal, transverse and normal stresses) were measured as a function of the distance from the crack tip along the crack-propagation direction. The shape of respective crack tips on the five CT specimens was examined using scanning electron microscope. The results show the distinct residual-stress fields near the crack tip and significant changes in the crack-tip geometry for five different loading cases. It is thought that the combined effects of the changes in the residual-stress state and crack-tip geometry seem to be a key factor to account for the observed transient crack-growth phenomena. |
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| Publication date | 2010-12-01 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 16945685 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | fbcc2de8-9555-4dd9-ae77-c093f3678842 |
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| Record created | 2011-03-03 |
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| Record modified | 2020-04-17 |
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