New Measuring Method of Axisymmetric Three Dimensional Residual Stresses Using Inherent Strains as Parameters(Welding Mechanics, Strength & Design)

概要

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For Measurement of axisymmetric three dimensional residual stresses, Sachs' method is often used. The accuracy of this method is not high when even small errors are contained in observed strains. Several years ago, the authors presented a new measuring principle of residual stresses in which inherent strains (source of residual stresses) are dealt as parameters and formulated a general measuring theory based on the finite element method. In this paper, based on the general measuring theory, a new measuring theory of axisymmetric three dimensional residual stresses is developed and the practical procedure of the measurement is presented. The accuracy of measured residual stresses by this method is much improved. This method is applied to an actual measurement of residual stresses produced in a quenched shaft and its reliability and practicability are also demonstrated.
大阪大学の論文