中文摘要：

研制了双光纤Bragg光栅（FBG）温度/应变传感器,监测二次后固化对树脂传递模塑（RTM）成型复合材料的应变自由温度、玻璃化转变温度、残余应变及热膨胀系数的影响规律,并分析模具材料对热膨胀系数的影响。实验结果表明,二次后固化后,复合材料应变自由温度和玻璃化转变温度分别从189.0℃、189.4℃增加到200.2℃、204.0℃;外层残余应变从-597.7με下降至-671.5με;外层复合材料热膨胀系数从5.248×10^-6/℃下降为4.275×10^-6/℃,说明后固化可显著提高复合材料性能。

英文摘要：

The performance of composites manufactured by resin transfer molding（RTM） processing can be monitored by fiber Bragg grating（FBG） sensor during post-curing procedure.The effects of post-curing on the strain free temperature,glass transition temperature,residual strain,coefficient of thermal expansion of the composites are monitored by the temperature/strain double-FBG sensors.The effect of mould material on the coefficient of thermal expansion is also discussed.The test results indicate that the strain free temperature and the glass transition temperature change from 189.0 ℃ and 189.4 ℃ to 200.2 ℃ and 204.0 ℃,respectively,the outer residual strain changes from-597.7 με to-671.5 με,the outer coefficient of thermal expansion changes from 5.248×10^-6/℃ to 4.275×10^-6/℃ after the post-curing process.Therefore,post-cure can improve the performance of composites.