碳密封涂覆光纤在编织复合材料中的应用

APPLICATION OF CARBON HERMETICALLY COATED OPTIC FIBERS IN BRAIDED COMPOSITES

碳密封涂覆光纤由于具有良好的强度性能和抗疲劳能力 ,已应用于海底光缆、军用制导光纤以及苛刻环境下的光纤传感系统中。本文作者研究了碳密封涂覆光纤在三维碳 /环氧编织复合材料中的应用。将该光纤成功地编入编织复合材料试件并成型。对该光纤在编织前、后以及成型后的光学性能进行了测试。设计了使用碳密封涂覆光纤的偏振式光纤传感器 。

Conventional ply composites have shortcomings such as low interlaminar strength, which limit their application in the filed of aeronautics and astronautics. Braided composites can overcome those limitations. Having good strength and anti-fatigue performances, carbon hermetically coated optic fibers have been used in benthal optic cables, military guiding optic fibers and optic fiber sensing systems under harsh circumstances. In this paper, the application of carbon hermetically coated optic fibers in braided carbon/epoxy composites is studied through experiments. The optic fibers are successfully braided into 3-D braided composite test pieces and processed through resin transfer molding. Optic performance parameters of the optic fibers before and after their being braided into the test pieces, and after the molding process are tested, and compared. The results show that those parameters nearly do not change. Polarimetric optic fiber sensors using carbon hermetically coated optic fibers are designed for measuring the internal strain in braided test pieces under bending loads.