Study on Smart Manufacturing of FRTP Possessing Self-Repair Function

在本研究中获得了以下结论：1.成型过程中光纤传感器内部应变监测技术的发展包括EFPI光纤传感器在内的玻璃钢层合板在高压罐成型过程中的内部应变被测量。在实验中，传感器不仅可以测量冷却阶段的热收缩应变，还可以检测固化收缩。此外，通过对传感器施加剪切、压缩和弯曲载荷的实验，定量地得到了载荷与传感器输出的关系。纤维增强热塑性塑料(FRTP)智能制造技术的开发利用介电传感器测量了FRTP模压成型过程中基质树脂的粘度。从测试结果可以看出，通过介电测量可以检测到基质树脂粘度的变化。嵌入形状记忆合金的玻璃钢层合板的刚度控制为了实现形状记忆合金对FRTP的自修复功能，研究了埋入形状记忆合金的玻璃钢层合板的刚度控制问题。结果表明，在温度变化的情况下，形状记忆合金对结构刚度的控制效果明显。在刚度控制的基础上，可以对含有非对称形状记忆合金层的层合板的翘曲变形进行表征。利用光纤传感器对成型过程中的内部应变进行监测，以及利用介质传感器对基体树脂进行粘度测量的结果，对于实现玻璃钢的智能制造是非常有用的。

The followings have been obtained in the present study.1. Development of an internal strain monitoring technique with optical fiber sensors during a molding processInternal strains in the GFRP laminate including EFPI optical fiber sensors were measured during an autoclave molding. In the experiments, the sensors not only could measure heat shrinkage strains in the cooling stage, they also could detect cure shrinkage. In addition, the relations between the load and the output from the sensor were obtained quantitatively by the experiment in which shear, compression and bending loads were applied to the sensors.2. Development of a smart manufacturing technique for Fiber Reinforced Thermoplastics (FRTP)The viscosity of the molded matrix resins in FRTP was measured with a dielectric sensor during molding. From the results it was found that the change of the matrix resin viscosity could be detected from the dielectric measurement.3. Stiffness control of FRP laminates with an embedded Shape Memory Alloy (SMA)In order to realize a self-repair function by SMA for FRTP, control of the stiffness for GFRP laminates with embedded SMA wires was examined. From the results, effects of the SMA to control the stiffness were make clear under changing temperature. On the basis of the stiffness control, the warpage of the laminates containing an unsymmetrical SMA layer could be characterized.Above mentioned results of the internal strain monitoring technique with optical fiber sensors during molding and the viscosity measurement with the dielectric sensor for the matrix resins are very useful for realization of the smart manufacturing of FRTP.The stiffness control of FRP laminates with the embedded SMA is the basic technique for realization of the self-repair function of FRTP.More study is needed to accomplish the self-repair function but the fundamental results for it have been obtained in this study.