Abstract
The small scale gap test is a very important method to study the sensitivity characteristics of a composite solid propellant under shock waves. In this paper, the small scale gap test is taken as the research object. The theoretical model of shock wave conduction in the small scale gap test is established. The detonation parameters of mixed explosives and the shock wave incident parameters of propellants corresponding to different sizes of inert barriers are calculated. The reliability of the method is verified by classical examples. A numerical model is established for the small scale gap test, and the critical thickness of the partition plate is obtained with a 50% probability of initiation. The results can predict the development and safe use of a high-energy composite solid propellant and provide theoretical support for the establishment of safety standards of high-energy composite solid propellants.
Highlights
The Solid Rocket Motor (SRM) is widely used in power plants of various tactical and strategic weapons for its high reliability, shorttime launch, simple and convenient use, and convenient long-term storage
The explosive used in the small scale gap test is cast according to the mass ratio of pentaerythritol tetranitrate (PETN) to 2,4,6-trinitrotoluene [C7H5(NO2)3] (TNT) of 1:1
After the explosive is detonated, the explosive shock wave generated is attenuated by the gap, which acts on the propellant
Summary
The Solid Rocket Motor (SRM) is widely used in power plants of various tactical and strategic weapons for its high reliability, shorttime launch, simple and convenient use, and convenient long-term storage. The composite solid propellant is the power source material of the SRM.2 It plays an important role in the development of missile and aerospace technology. A certain type of composite solid propellant containing high-energy explosive components is taken as the research object, and a numerical simulation of the small scale gap test is carried out on it according to relevant standards. Scitation.org/journal/adv in the 1970s and can simulate real-world complex geometric nonlinear problems (large displacement, large displacement, high strain), material nonlinear problems, and contact nonlinear problems It is suitable for solving nonlinear dynamic impact problems of two-dimensional and three-dimensional nonlinear structures, explosion and metal forming, and other nonlinear dynamic impact problems.
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