Bond stress is an important aspect of structural integrity of SRM (solid rocket motor) and also the critical parameter in health monitoring. In order to realize the bond stress real-time online monitoring. A polymer packaged FBG (fiber Bragg grating) sensor was designed and embedded into HTPB(hydroxyl-terminated polybutadiene) propellant/liner bond specimen. The response of FBG sensor was studied when the specimen was subjected to tensile stress by simulation of FBG sensor reflection spectra and stress testing. Results showed that the center wavelength of the FBG sensor decreased with the increasing tensile stress of the specimen

and the sensor had a good linearity and stability. The FBG sensor was intact and the strength of the bonded specimen met the technical specifications in specimen bonding performance test

verifying the feasibility of the designed sensor and embedding method.