Effect of spatial variation of stress-free lattice spacings on measured residual stresses

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dc.contributor.authorLaw, Men_AU
dc.contributor.authorLuzin, Ven_AU
dc.date.accessioned2012-01-10T04:58:52Zen_AU
dc.date.available2012-01-10T04:58:52Zen_AU
dc.date.issued2011-11-01en_AU
dc.date.statistics2011-12-20en_AU
dc.description.abstractWhen neutron diffraction is used to measure residual stresses, estimates of the unstressed lattice spacing (d(0)) are often required. These are generally measured on a sample that is considered representative of the component. In the case of welded samples, the possibility of variation in weld shape between the d(0) sample and the area where stresses are determined must be taken into account. To assess this, d(0) values are measured on an area considered representative of the sample, and then are re-measured on a sample cut from the actual strain measurement plane. The residual stresses are re-calculated with these new d(0) values and the results compared to those based on the initial d(0) measurement. Methods of estimating these errors are discussed. The errors in residual stress that arise from the spatial variation of d(0) values are greater than the commonly reported peak fitting errors. These errors can be estimated and should be included in the reported residual stress measurements. Cutting a d(0) sample from the measurement plane makes this a destructive technique. © 2011, SAGE Publicationsen_AU
dc.identifier.citationLaw, M., Luzin, V. (2011). Effect of spatial variation of stress-free lattice spacings on measured residual stresses. Journal of Strain Analysis for Engineering Design, 46(8), 837-841. doi:10.1177/0309324711413648en_AU
dc.identifier.govdoc3859en_AU
dc.identifier.issn0309-3247en_AU
dc.identifier.issue8en_AU
dc.identifier.journaltitleJournal of Strain Analysis for Engineering Designen_AU
dc.identifier.pagination837-841en_AU
dc.identifier.urihttp://dx.doi.org/10.1177/0309324711413648en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3973en_AU
dc.identifier.volume46en_AU
dc.language.isoenen_AU
dc.publisherSAGE Publicationsen_AU
dc.subjectWeldingen_AU
dc.subjectResidual stressesen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectStrainsen_AU
dc.subjectCrystal latticesen_AU
dc.subjectPeaksen_AU
dc.titleEffect of spatial variation of stress-free lattice spacings on measured residual stressesen_AU
dc.typeJournal Articleen_AU
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