0000000000617405
AUTHOR
Guillaume Montay
Determination of the residual stresses in composite laminate using the compliance method
Residual stresses play an important role on the mechanical behavior of composite laminate. The development of new methods to determine the residual stresses gradient within the laminates is necessary. This article presents the adaptation of the compliance method in the case of composite laminates carbon/epoxy [02/902]s. The incremental drilling of a constant width groove allows for each increment to measure the strains (using strain gages) and displacements (using an optical device) of particularly points of the structure surface. These experimental data are compared with results given by a finite elements simulation. This comparison allows to raise the residual stresses in the composite la…
Optimisation de la méthode du trou incrémental pour la mesure des contraintes résiduelles dans les matériaux composites stratifiés
International audience
Approche des contraintes résiduelles dans les composites stratifiés par la méthode de la compliance
International audience
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.
Application de la méthode de la flèche à la détermination des contraintes résiduelles dans les composites stratifiés
International audience