用光纤进行树脂基复合材料的成型过程监测

研究了用光纤对碳纤维环氧树脂复合材料成型监测的方法和系统。通过测量复合材料成型过程中树脂折射率的变化来反映树脂的粘度变化和固化过程。

In-situ Cure Monitoring of Fabrication of Epoxy Resin Composites with a Novel Fiber-optic Sensor

A costeffective approach is supposed to insitu monitor the fabrication of epoxy resin composites with a fiberoptic sensor. A fiberoptic evanescent wave refractive index sensor is made by removing a short region of the cladding of a low refractive step index optical fiber. The sensor is used to insitu monitor the viscosity variation and cure process during the fabrication. As the sensor respones the integrated effects along the sensing region, the influences of the defects in the resin such as voids and impurity can be reduced on a large extent. In order to facilitate the operation, a probe configuration is made by depositing a retroreflectic film on the distal end of the optic fiber near the sensing region. Experiments have been performed on the epoxy prepreg hot pressing to test the feasibility of the supposed approach.