A Selection Method of Observing Positions for Highly Accurate Measurement of Residual Stresses(Welding Mechanics, Strength & Design)

概要

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The authors have already proposed the general principles in measurement of residual stress. In this paper, the authors developed a new method for selection of observing positions of strains to ensure highly accurate measurement of residual stresses over a whole object by using the theory of inherent strain, which is based on one of these principles. By this selection method, it is seen that the more number of observations ensures the better average accuracy of estimated values. However, there are many positions where observed values scarcely influence the accuracy of measurement. These positions can be excluded from the measurements for reasons of economy and comparatively small number of observing positions can be selected by the present theory, which still secures a high accuracy of measurement.
大阪大学の論文