基于FBG 传感器的复合材料固化监测

温度和内应力是影响复合材料固化过程和结构性能的重要因素,将双光栅的FBG传感器埋入到玻璃纤维/环氧树脂预浸层合板结构中,监测热压固化过程中温度、黏度和内应力变化,并简要分析了固化后的残余应变。实验证明FBG传感器可有效监测复合材料结构固化过程的温度、黏度和内应力,能够作为智能固化控制依据,且固化结束之后,相同的传感器可以被用于提供结构使用过程中产生的温度/机械变化的信息。

Cure Monitoring of Composite With Fiber Bragg Grating Sensor

The temperature and internal strain are most important factors, affecting the curing processing and
structure properties of composites. The double fiber Bragg grating (FBG) sensors were embedded in the prepreg glass fiber/ epoxy laminate composite structure to monitor the variable of temperature,viscosity and internal strain in the hot-press curing processing and briefly analyze the residual strain after curing. The experiments indicate that the FBG sensors can monitor the temperature and internal strain in the curing processing of composites and provide a basis for intelligent curing control. Once the composite is cured, the same sensor can be used to provide the information about the mechanical/ temperature changes in the performance of structure.