基于FBG的不同工艺下环氧树脂固化监测研究

Study on Curing Process Monitoring of Epoxy Resin With Different Processes Based on Fiber Bragg Grating

不同工艺下复合材料固化时的温度变化、固化速率及产生的应变会对复合材料的成型质量产生巨大影响。针对在不同工艺条件下对树脂基复合材料固化过程的监测要求,采用将光纤布喇格光栅埋入环氧树脂内部的方法,对环氧树脂在恒温40℃和室温24℃两种不同工艺下的固化过程进行实时在线监测,固化时间均持续18h。结果表明,环氧树脂在恒温40℃工艺条件下固化时的温度变化、固化速率及产生的应变都比在室温24℃工艺条件下大。

The temperature change,curing rate and the strain produced by the composite materials under different processes can greatly influence the molding quality of composites.In order to meet the requirements of monitoring the curing process of resin matrix composites under different technological conditions,the fiber Bragg gratings（FBGs）were embedded into epoxy resin under different conditions at the constant temperature of 40 ℃ and room temperature of 24 ℃,respectively.And the curing time was lasted for 18 hours.The results showed that the temperature change,curing rate and the strain during the curing under the constant temperature of 40 ℃ were bigger than these at room temperature of 24 ℃.