Mechanical Behavior Analysis of SRM during Cooling Process after Curing

Abstract:
In order to analyze the stress and strain characters of SRM (solid rocket motor) during cooling process after curing, based on the three-dimensional transient heat conduction theory and viscoelastic constitutive law, using ABAQUS finite element software, the thermal-stress coupling simulation is carried out. The temperature distribution and stress strain response of the motor components are obtained. The results show that the stress at the shell/insulator interface is much greater than that at the propellant grain/insulator interface. The stress and strain near the end of the outer surface and the middle part of the inner surface of the grain are large, while the stress and strain at the other positions are relatively smaller. The results are valuable for analyzing the mechano-chemical interaction in the motor charging process and improving motor performance.