DESIGN REQUIREMENTS OF EMBEDDED FIBER BRAGG GRATING SENSORS FOR THE MONITORING OF COMPOSITE PRESSURE VESSELS

초록

The composite pressure vessel which is made by filament winding method is rapidly expanding their range of use. However, it has diverse fracture modes and complex failure mechanism similarly as general composite materials. Thus, for the reliability of composite materials, smart structures can be constructed with various types of sensor and actuator. In this study, the fiber Bragg grating(FBG) sensor, one of the most promising sensors for the smart composite structure, was used for the monitoring of strains inside composite pressure vessels. Fabrication process of filament wound structures with embedded FBG sensors was examined in several pressure vessel cases