Residual stress measurement using the hole drilling method and laser speckle Interferometry part II: analysis technique

摘要

In Part I, we described the mechanical layout for a residual stress measurement system, comprising an electronic speckle pattern interferometer (ESPI) used in conjunction with the hole drilling method for relieving stress. In the initial stages of development of this tool, the analysis technique was adopted from previous research in holographic interferometry. In this paper, we discuss the implementation of a technique more suitable for digital data obtained with an ESPI system.