Research on Health Monitor for Three-Dimensional Braided Composite Material

Abstract

This paper describes two methods of Fiber Bragg Grating (FBG) embedded in the three-dimensional (3D) braded composite materials and acoustic emission health monitor for 3D braided composite materials condition. The paper mainly analyses the relations of FBG change and the inner straining under the stretching on materials. It is provided that the way of signal collection and processing. The experimental results proved that FBG sensors have exceptional sense characteristic. The braided angle of composites has a little influence on FBG signal. FBG embedded in the 3D braided composite materials has not more effect mechanical property of materials. According to two health monitoring methods and the particularity of 3D braided composites, the health monitoring method based on FBG much more applies to dynamic monitoring on 3D composites special field. This research provides basis for the study and application of advanced intelligent composites.

Braiding procedure and axial compressive behaviors of three-dimensional integrated braided composite three-way circular tubes

“…For example, Wu et al, 12 Gideon et al, 13 and Yang et al 14 demonstrated that the 3-D braided composite tube has excellent energy absorption capability and the interlacing point could effectively prevent yarns separating from the braided structure. Chen and Li 15 preformed a 3-D integrated braided tube with flange and Lu 16 designed a braiding method to prepare tube base plate. They all found that the connection region has high load carrying capacity due to the nonlaminated and integrated structure.…”