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dc.contributor.authorWIMPORY Robert Charlesen_GB
dc.contributor.authorOHMS Carstenen_GB
dc.contributor.authorHOFMANN Michaelen_GB
dc.contributor.authorSCHNEIDER Raineren_GB
dc.contributor.authorYOUTSOS Anastasius Georgeen_GB
dc.identifier.citationINTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING vol. 86 no. 1 p. 48-62en_GB
dc.description.abstractWithin Task Group 1 (TG1) of the European Network on Neutron Techniques standardization for Structural Integrity (NeT), residual stress determinations by neutron diffraction were performed on a single weld bead on a plate (BoP) specimen by several laboratories. By following a pre-defined protocol, residual stress distributions have been estimated in the plate. Each residual strain/stress instrument at each institute have their own characteristics and their own methods by which the data is analyzed, however, the final estimate of the stress distributions are expected to be ¿the same¿ to within a quoted uncertainty. This implies that the quoted uncertainty for each stress determination should be realistic. At specific locations in the BoP specimen a modified Bayesian approach was used to obtain an average stress. This special approach is less affected by outliers, although care must be taken as it has been observed that in the case where there are few data points in the average, a strong bias can occur towards data points with a relatively small quoted uncertainty. In the data analyses used here, a ¿fairer average¿ less influenced by such bias is implemented. Presented here is an overview of the main features that influence the stress and associated uncertainty determination, such as reference values, choice of moduli values, grain size effects and positioning etc.en_GB
dc.description.sponsorshipJRC.F.4-Safety of future nuclear reactorsen_GB
dc.publisherELSEVIER SCI LTDen_GB
dc.titleStatistical Analysis of Residual Stress Determinations Using Neutron Diffractionen_GB
dc.typeArticles in periodicals and booksen_GB
JRC Directorate:Energy, Transport and Climate

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