基于分布式光纤传感技术的CFRP板变形监测研究

Research on deformation monitoring of CFRP plate using distributed optical fiber sensing technology

碳纤维增强复合材料(CFRP)具有优良的抗拉强度和耐腐蚀性,被广泛应用于支护和加固结构中。为研究碳纤维复合材料使用过程中的变形特性,在CFRP板上布设分布式光纤传感器,开展CFRP板有损和无损两个工况下的变形监测试验,并在CFRP板上布设电阻应变片进行应变测试对比。试验结果表明:分布式光纤传感器能够有效测量CFRP板各处的应变信息,测量应变与有限元分析值、电阻应变片测量值基本吻合,分布式光纤传感器连续布设比定点布设更能真实反映CFRP板变形。

Carbon fiber reinforced polymer(CFRP)has been widely used in supporting and strengthening structures due to its excellent tensile strength and corrosion resistance.In order to study the deformation characteristics of CFRP in service,distributed optical fiber sensors were placed on the CFRP plate to carry out deformation monitoring tests of CFRP plate under two working conditions of damage and non damage,and resistance strain gauges were placed on the CFRP plate for strain test comparison.The experimental results show that the distributed optical fiber sensor can effectively measure the strain information of the CFRP plate,and the measured strain is basically consistent with the finite element analysis value and the resistance strain gauge value.The continuous arrangement of the distributed optical fiber sensor is more realistic than the fixed-point arrangement to reflect the deformation of the CFRP plate.