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.

Behavior of Structural Concrete Frames with Hybrid Reinforcement under Cyclic Loading

“…High-tensile fiber stiffeners, such as carbon, glass, aramid, and basalt, are integrated into polymeric arrays and made in different shapes such as rods, grids, and tubes [3]. The characteristics of lightweight, high strength, acceptable fatigue resistance, and superior corrosion resistance also make FRP composites a major source of use as construction material or reinforcement in civil engineering [14][15][16]. FRP composite materials showed poorer elasticity and lowered bonding with concrete compared to traditional steel reinforcement.…”

Review of microwave techniques used in the manufacture and fault detection of aircraft composites

“…There is ongoing research on other non-destructive testing (NDT) techniques for more accurate evaluation and convenient implementation, such as acoustic emission (2)(3)(4)(5)(6)(7)(8) , guided waves (9)(10)(11)(12)(13)(14)(15)(16)(17)(18) (e.g. piezoelectric transducer-based (19,20) and angle beam transducer-based (21,22) ), air-coupled ultrasonics (23)(24)(25)(26)(27)(28)(29)(30) , thermography (31)(32)(33)(34)(35)(36) , optical fibre sensing (37)(38)(39)(40)(41)(42) , digital image correlation (DIC) (43)(44)(45)(46)(47)(48) , electromagnetic testing (49)(50)…”