Effects of cutting and specimen size on neutron measurement of residual stresses
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Date
2010-12-16
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Publisher
Insitute of Physics
Abstract
To perform neutron residual stress measurements it is often necessary to cut samples to a manageable size. The effects of cutting a girth welded pipe were investigated with analytical methods and finite element analysis. The effect of cutting on measured stresses was calculated. A simplified method of modelling residual stresses in welds, "chill modelling", is introduced. In ring slitting a cut is made in the axial direction and the deformation is maeesured. The change in elastic stress can be calculated and added to neutron diffraction measurements made on a cut ring to calculate the original stresses. Residual stress measurements were performed to validate the ring slitting correction using ANSTO's residual stress diffractometer Kowari. © 2010, Insitute of Physics.
Description
Keywords
Samplers, Residual stresses, Measuring methods, Deformation, Neutron diffractometers, Neutron diffraction
Citation
Law, M., Luzin, V., Kirstein, O. (2010). Effects of cutting and specimen size on neutron measurement of residual stresses. Paper presented to the International Conference on Neutron Scattering 2009, 3th–7th May 2009. Knoxville, Tennessee, USA. In Journal of Physics: Conference Series, 251(1), 012044.