Investigation of strain distribution in ice composite materials using integrated fiber-optic sensors

The harsh climatic conditions of the Arctic, the poor development of industry and infrastructure in the region, along with the remoteness from industrialized regions, place high demands on functionality and reliability for the materials used and various technical devices and structures made from them. For long-term structures, there is a need to assess their condition during operation. Optical sensors based on a fiber Bragg grid are promising from the point of view of integrated control of the structural material. In this paper, the distribution of deformation along the longitudinal axis of the sample in the matrix and reinforcing filler of an ice-based composite material during its three-point bending test is investigated. It has been demonstrated that unidirectional reinforcement of ice with two layers of basalt roving doubles the bending strength of the sample. The prospects of the proposed approach for monitoring the deformation of ice reinforced and non-reinforced materials by integrated fiber-optic sensors under external mechanical influence are shown using the example of testing samples for three-point bending.