0000000000862619
AUTHOR
Emmanuelle Rouhaud
Nouvelle approche dans l'analyse des contraintes résiduelles par l'interférométrie de Speckle
International audience
Residual strain and stress analysis by speckle interferometry combined with the drill of a groove
A new method for residual stresses determination combining Electronic Speckle Pattern Interferometry (ESPI) with the machining of a groove. The internal stress field is perturbed as the depth of the groove is increased incrementally [1]. The structure finds a new equilibrium state generating displacements which are measured using ESPI. This method was tested on an aluminium alloy plate treated locally by ultrasonic shot-peening. The investigation of the images obtained with the phase shifting technique and fringe patterns makes it possible to analyze, simultaneously, the stress profile along two directions: along the depth of the structure, and along the groove direction.