Author(s)

D. Bigaud, P. Rochette, P. Labossiere

Abstract

Strain sensing is one of the important requirements when testing the performance of materials or structures. Optical fiber sensors can continuously measure them for a long period. This paper deals with the use of a fiber-optic Bragg grating sensor embedded within an anisotropic structure. Although there is no effect on the stiffness properties, stress concentrations around the optical fiber may affect the measured strain values. We propose an inclusion model on which we apply a dual approach derived from the method of cells. It allows the determination of the local strains within a structure as a function of macroscopic stress values. 1 Introducti

Keywords