Process and Health Monitoring of FBG Sensor Embedded 3-D Braid Fabric Reinforced Composite

FBG 센서를 삽입한 3차원 브레이드 섬유강화 복합재료의 성형공정 연구 및 비파괴 검사

Epoxy composite reinforced with 3-D braided Glass/Aramid hybrid fabric was fabricated. FBG sensor was embedded along the braid yam in order to monitor the changes of the complicated inner region of the 3-D braid structure. The good linearity between Bragg wavelength and temperature was verified by several preliminary experiments. The strain inside 3-D braided beam was estimated using FBG sensor system, and the result was compared with the calculated value. It was found that FBG sensor system is very useful technique to investigate inside region of complicated structure.