Nonlinear analysis of SRM nozzle closure with initial coherence imperfections under distributed load

Based on the von Karman's theory, the nonlinear analysis of SRM nozzle closure under distributed load was conducted. The effects of processing factors on the deformation of the nozzle closure, and the interface stress of the closure and the throat insert were taken into account. Four calculating models, which include one perfect form and three various debond forms were also considered. The results can figure out that the debond for the closure and the throat insert play an important part in the interface intensity.