ABSTRACT
The aim of the coating is to protect the optical fiber against mechanical/chemical aggressions. For a sensing purpose, the coating must also be designed to ensure an optimal transfer of temperature and strain from the host material (concrete matrix, soil, composite laminates…) to the optical fiber. However, due to shear deformation of the cable’s coating, strain measured in the optical fiber may differ from that in the host structure. It is thus necessary to model the stress transfer mechanism through the protective coating so that the strain field in the host material can be derived from experimental data provided by the core optical fiber.
