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dc.contributor.author Amjad, Khurram
dc.contributor.author Asquith, David
dc.contributor.author Patterson, Eann A.
dc.contributor.author Sebastian, Christopher M.
dc.contributor.author Wang, Wei-Chung
dc.date.accessioned 2017-10-12T13:09:39Z
dc.date.available 2017-10-12T13:09:39Z
dc.date.issued 2017-11-08
dc.identifier doi:10.5061/dryad.51256
dc.identifier.citation Amjad K, Asquith D, Patterson EA, Sebastian CM, Wang W (2017) The interaction of fatigue cracks with a residual stress field using thermoelastic stress analysis and synchrotron X-ray diffraction experiments. Royal Society Open Science 4(11): 171100.
dc.identifier.uri http://hdl.handle.net/10255/dryad.159070
dc.description This article presents an experimental study on the fatigue behaviour of cracks emanating from cold-expanded holes utilising thermoelastic stress analysis (TSA) and synchrotron x-ray diffraction (SXRD) techniques with the aim of resolving the long-standing ambiguity in the literature regarding potential relaxation, or modification, of beneficial compressive residual stresses as a result of fatigue crack propagation. The crack growth rates are found to be substantially lower as the crack tip moved through the residual stress zone induced by cold expansion. The TSA results demonstrated that the crack tip plastic zones were reduced in size by the presence of the residual compressive stresses induced by cold expansion. The crack tip plastic zones were found to be insignificant in size in comparison to the residual stress zone resulting from cold expansion, which implied that they were unlikely to have had a notable impact on the surrounding residual stresses induced by cold expansion. The residual stress distributions measured along the direction of crack growth, using SXRD, showed no signs of any significant stress relaxation or redistribution, which validates the conclusions drawn from the TSA data. Fractographic analysis qualitatively confirmed the influence on crack initiation of the residual stresses induced by the cold expansion. It was found that the application of single compressive overload caused a relaxation, or reduction in the residual stresses, which has wider implications for improving the fatigue life.
dc.relation.haspart doi:10.5061/dryad.51256/2
dc.relation.haspart doi:10.5061/dryad.51256/3
dc.relation.haspart doi:10.5061/dryad.51256/4
dc.relation.isreferencedby doi:10.1098/rsos.171100
dc.subject Cold expansion
dc.subject Fastener holes
dc.subject Residual stresses
dc.subject Thermoelastic stress analysis
dc.subject Synchrotron x-ray diffraction
dc.subject Fatigue cracks
dc.title Data from: The interaction of fatigue cracks with a residual stress field using thermoelastic stress analysis and synchrotron x-ray diffraction experiments
dc.type Article
dc.contributor.correspondingAuthor Patterson, Eann
prism.publicationName Royal Society Open Science

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Title SXRD data
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Description The file includes the data from the SXRD experiments
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Title TSA data
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Title CT plastic zone code
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Description Matlab code for determining crack tip plastic zone
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