内埋FBG传感器复合材料加筋板的固化过程及准静态压缩监测

Curing process and quasi-static compression monitoring of stiffened composite panels with embedded FBG sensors

将布拉格光纤光栅(fiber Bragg grating,FBG)传感器埋植在纤维增强树脂基复合材料加筋板结构的三角填充区,在线监测复合材料T型加筋板的固化过程与准静态压缩过程。结果表明,埋植FBG传感器的加筋板和未埋值FBG传感器的加筋板,其压缩破坏载荷基本相当。同时,内埋于复合材料加筋板三角填充区的FBG传感器可以有效监测复合材料加筋板固化过程的应变变化,固化后亦可用于实时监测结构中产生的温度和应变变化。在准静态压缩过程中,FBG传感器测得的应变值变化曲线与接触力-压头位移曲线变化趋势基本一致。FBG传感器可在不影响结构性能前提下,准确地响应复合材料加筋板在受载条件下出现的分层、开裂等损伤。

The FBG sensors,embedded in triangle region of composite T-stiffened panels,were used to monitor the strain change during curing process and quasi-static compression real-timely.The results show that the compression load of stiffened panels with the FBG sensor embedded along the stiffener is the same as that without the FBG sensor.The FBG sensor embedded in the triangular area of the stiffened panels can effectively monitor during the curing process,and it can also be used to monitor the temperature and strain changes real-timely after curing process.In the quasi-static compression process,the strain curve measured by the FBG sensor is the same as the force-displacement curve.The FBG sensors can monitor accurately the damage such as lamination and cracking in the stiffened panels without affecting the property of the stiffened panels.