A New Analytical Approach for Hole Drilling Residual Stress Analysis by Full Field Method

Abstract

Most of the full field methods for residual stress investigation combine an optical interferometric technique (grating interferometry, speckle interferometry, holographic interferometry) with the standard hole drilling method. Nowadays many articles describing this kind of approach exist, but most of them focus on the experimental aspects while little attention is devoted to the optimal usage of the huge mass of data that the optical methods make available. This paper, without relying on a specific experimental technique, focuses on the development of a new analytical method that attempts to consistently use all the available data. After a detailed algorithm description, the proposed analysis procedure is tested against numerically generated residual stress fields simulating in-plane speckle interferometry. The results obtained show the reliability and robustness of the algorithm.