The study of internal structure of woven glass and carbon fiber reinforced composite materials with embedded fiber-optic sensors

Abstract

In this work, samples from composite materials with embedded optical fibers are investigated. It is known that for unidirectional layered composite materials a distortion of the internal structure and the formation of such technological defect as resin pocket in the region of the embedded optical fiber occur under certain conditions. So it is important to evaluate the change in the internal structure for other types of reinforcement, in particular, woven reinforcement. Analysis of the internal structure of the studied materials with 2×2 twill weave style was carried out using a digital microscope. In addition, the reflected optical signal from the Bragg gratings after being embedded into the composite material is analyzed.