Determination of high-gradient components of residual stress by data of test hole drilling method

Abstract

Abstract The article discusses a modified method for the determination of residual stress in a deformable solid. The general approach is based on a combination of test hole drilling method and speckle pattern interferometry as a tool for deformation response registration. A feature of the proposed procedure for processing experimental data is that it directly takes into account possible high stress gradients at the stage of theoretical model building. The applicability of this technique is illustrated by the example of the residual stresses components measuring at a welded pipe joint.