摘要
提出采用光纤微弯传感器测量复合材料固化中粘度的变化。选择了合适的光纤并进行了增敏处理。完成了不同铺层方式的复合材料固化进程的粘度测量 ,并与动态介电方法的测量结果进行了比较。结果发现 ,光纤微弯衰减方法对于热压情况下复合材料的固化监测是敏感的。该方法可重复性好 ,可以准确给出树脂粘度最低点和固化完成点的时间 ,灵敏度与光纤同增强纤维的交角有关。利用完成固化监测功能后仍具有光波导性能的已埋入光纤 。
In this paper it is proposed to measure the change of viscosity of composite resin using fiber optic microbend attenuation. Proper optical fibers were selected and processed to increase sensitivities. Experiments of viscosity measurement for different lay up conditions were accomplished and the results were compared to dielectric measurement. It is found that fiber optic attenuation is sensitive to composite cure monitoring in autoclave with good reliability which can indicate the gel point and the end point of the cure processing. The sensitivity is found to be related to the cross angle of optical fiber to reinforced fiber and the pressure in cure process. Embedded optical fibers which can accomplish cure monitoring and maintain optical wave guide performance are developed to be two sorts of vibration sensors based on the statistic mode of fiber optic vibration sensing mechanism.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2000年第1期37-41,共5页
Acta Materiae Compositae Sinica
