空心光纤在复合材料断裂位置测量中的研究

损伤监测与断裂修复是复合材料研究的难题之一。利用空心光纤注胶来实现复合材料的自诊断、自修复是一种行之有效的方法。由此对空心光纤的传光机理做了详细的研究和分析,并介绍了利用空心光纤对复合材料断裂位置进行测量的原理、方法及实验研究。首先给出了空心光纤的性能,其次介绍了利用测量光纤衰减特性的剪断方法来进行复合材料断裂位置的研究,最后介绍了Y型耦合器在断裂位置研究中的实用性,并以一个系统的实验原理图作为整个研究的小结。

RESEARCH ON SELF-DIAGNOSE OF THE RUPTURE PLACE USING HOLLOW-CENTER OPTICAL FIBER IN COMPOSITE MATERIAL

Monitoring damage and repairing crack are the important problems in composite materi- als. The method of self- diagnose and self- repair composite structures using a hollow- center optical fiberfilled adhesive isa good technique.Based on thisthought,the mechanism investigation and anal- ysis of light transmission in the hollow- center optical fiber are made in detail.The measure method and experimental research of self- diagnose for the rupture location in composite materials are also put forward.In thispaper,the performance ofthe hollow- centeropticalfiberisexplained first.The theo- ry of light transmission attenuation by snipping the optical fiberis used in self- diagnose of the rupture location. Finally,a Y couplerisgiven to measure the rupture location and a generalexperimental sys- tem for self- diagnose and self- repair is given as an example.