Life Cycle Performance Screening Using Fiber Optic Grating Sensor System for Composite Cryogenic Tankage

This Phase I SBIR will develop a methodology for monitoring the performance of composite cryogenic tanks through a system consisting of fiber grating strain sensors that will be integrated into the tank. The methodology will be developed through analysis,experimental testing of a demonstration article and subsequent evaluation of the results to check analysis. Blue Road Research will employ technology it has developed for both single and multiple axis fiber grating sensors allowing sensors to be mountedon the surface of the tank as well as at different depths in the demonstration article. The unique capabilities of the multi-axis fiber grating allow measurements of shear strain, transverse strain gradients and simultaneous strain and temperature thatare beyond the capabilities of single axis fiber grating strain sensor technology.Developing technology and methodology that will support cradle to grave health monitoring of composite cryogenic tanks will be critical for both military and commercialreusable launch vehicles. Blue Road Research and Thiokol anticipate this technology will also be highly applicable to monitoring natural gas storage tanks.