To investigate the influence factors of propellant grain integrity under the internal pressure, the cylindrical grain was equivalent to a thick-wall cylinder and its three-dimension stress-strain problem was solved. Under the internal and external pressure, the strain and displacement equations of the inside thick-wall cylinder were expressed, and then, the stress and strain expressions of grain were obtained. On this basis, the hoop strain equations on the inside surface of the cylindrical grain and case were developed. The hoop strain on the inner surface of the grain can be predicted by the hoop strain of the case cylinder via the strain equations, and therefore, the hoop strain in the inner surface can be indirectly monitored in real time during the working process of the motor. The hoop strain in the inner surface of grain can be effectively reduced by increasing the case stiffness or decreasing the m number of the grain.
The Influence Factors of Grain Integrity under the Internal Pressure Condition in SRM
2021
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Influence of grain flow on bolt integrity
TIBKAT | 1999
Influence of Grain Flow on Bolt Integrity
SAE Technical Papers | 1999
Influence of Grain Flow on Bolt Integrity
SAE Technical Papers | 2012
European Patent Office | 2023
|17KS12000 Motor Grain Structural Integrity Analysis
NTIS | 1981
|