Study of Surface Residual Stress by Three-Dimensional Displacement Data at a Single Point in Hole Drilling Method

摘要

A method combining moire interferometry, Twyman-Green interferometry, and blind hole drilling method is proposed for simple and accurate determination of residual stress. The relationship between the three-dimensional surface displacements produced by introduc- ing a blind hole and the corresponding residual stress is established by employing the Fourier expansion solution containing a set of undetermined coefficients.