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利用埋设在复合材料内部的未封装光纤光栅(Fiber Bragg Grating,FBG)传感器监测环氧树脂梁和玻璃纤维层压梁在三点弯曲过程中的应变变化,并与理论值进行对比,结果表明:两者所得的应变变化趋势吻合良好.光纤光栅传感器测量典型复合材料梁内部应变的方法不仅适用于各向同性的环氧树脂复合材料,而且适用于各向异性的玻璃纤维复合材料.
The strain changes of epoxy resin and glass fiber laminated beams during 3-point bending were monitored by using the Fiber Bragg Grating (FBG) sensor embedded in the composite material. The results were compared with the theoretical values. The trend of the strain changes is in good agreement with each other.The method of FBG sensor to measure the internal strain of a typical composite beam is not only applicable to isotropic epoxy resin composites but also to anisotropic glass fiber composites.