基于FBG传感器的碳纤维复合材料内部热应变监测  

INTERNAL THERMAL STRAIN MEASUREMENT OF COMPOSITES WITH EMBEDDED FIBER BRAGG GRATING SENSORS

作　　者：贾卫芳 孙宝忠[1] 

机构地区：[1]东华大学纺织学院,上海201620

出　　处：《玻璃钢／复合材料》2016年第2期75-78,共4页Fiber Reinforced Plastics/Composites

基　　金：国家自然科学基金(11272087)

摘　　要：将光纤布拉格光栅（Fiber Bragg Grating,简称＂FBG＂）传感器分别埋入单向板和平纹机织层压复合材料中,采用Sm125型光纤光栅解调仪测试两种复合材料在20～100℃温度范围内的内部热应变,分析单向板和平纹机织层压复合材料在仅受温度作用下内部热应变变化特征。结果表明,FBG传感器可以准确测量复合材料内部热应变变化;单向板和平纹机织层压复合材料的内部热应变均随温度升高而增大;织物结构影响复合材料内部热应变,且同一温度点,平纹机织层压复合材料内部热应变较单向板大。This paper studies the internal thermal strain measurement under the temperature range of 20- 100℃ by FBG sensors embedded in the center of unidirectional （UD） laminates, and carbon fiber/epoxy plain woven lam- inates with the Sm125 sensor interrogator. The internal thermal strain properties of both composites under a thermal load were analyzed. The results showed that the internal thermal strains of both composites could be accurately measured using a referenced FBG sensor and the FBG sensors embedded in the center of materials under a thermal load. In addition, the thermal expansion coefficients of both composites were discussed to determine the variation behavior with the increase of temperature. Also, the internal thermal strains of both composites increase with the increasing temperature. It was also found that fabric structure affect the internal thermal strain, and at the same temperature point, the internal thermal strain of plain woven laminates is larger than that of UD laminates.

关 键 词：碳纤维复合材料 FBG传感器 内部热应变 

分 类 号：TB332[一般工业技术—材料科学与工程]