DEVELOPMENT AND EVALUATION OF FILAMENT WOUND COMPOSITE MOTORCASE STRUCTURES WITH EMBEDDED SENSOR ARRAYS

摘要

This paper presents the results of a Small Business Innovation Research (SBIR) program to develop an improved technique for structural health monitoring of filament wound composite rocket monitoring using embedded fiber optic sensor (FOS) arrays. As part of this research, Fiber Bragg Orating sensor arrays were embedded in filament wound composite rocket motorcases using embedded fiber optic sensor (FOS) arrays. As part of this research, Fiber Bragg Grating sensor arrays were embedded in filament wound composite pressure vessels to measure internal strain during curing and pressurization. Multiplexing instrumentation was developed and improved throughout the course of this research for providing real-time measurements of strain at several locations throughout the filament wound structure. Testing of filament wound composite pressure vessels with embedded sensor arrays has shown that multiple embedded sensor arrays can provide meaningful measurements of internal strain for cure monitoring, impact damage assessment and structural health monitoring and that the embedded sensor arrays do not adversely effect burst strength performance of the composite pressure vessels.