Abstract
For aluminized explosive, the charge performance of explosive grenade is very significant for promoting their application. Firstly, the detonation performance of cyclotrimethylenetrinitramine (RDX) based explosives with different aluminum powder (0%, 20%, 25%, 30%, 35%, and 40%, respectively) content was investigated. Next, the air blast tests of RDX-based aluminized explosives were carried out. Then, RDX-based explosive grenade charges of L-1 and L-2 where the aluminum powder content was 20% and 25% were selected for air blast and static blasting fragments velocity tests. Finally, the energy release mechanism of the air blast was deduced via calculation. The results show that RDX-based aluminized explosives have higher detonation heat, detonation velocity, and detonation volume when the aluminum powder content is 20%, and the shock wave over pressure as well as impulse keep a high level at the same time within 4.5 m. The air blast performance of L-1 is better than L-2 within 2.2 m. As the distance increases, the air blast energy of L-1 is mainly used for shell rupture and fragment acceleration, while the contribution of L-2 is less than that of L-1. This study demonstrated that the explosion power of RDX-based explosive grenade charge is the most powerful where the content of aluminum powder is about 20%.
Highlights
Since metal powder with high calorific value (e.g., Al, Mg, etc.) can further release a large amount of energy with the explosive products (e.g., H2O and CO2), adding metal powder to the explosive is one of the effective methods to improve the energy of the explosive, which is called metalized explosive [1,2,3]
Adding aluminum powder to the explosive within a certain range can provide energy upon the shock wave energy and bubble energy for the underwater explosion [10, 11]. e weight content, particle size, particle distribution, and particle morphology of aluminum can have a great influence on the detonation performance of aluminized explosives [12,13,14,15,16,17,18,19]
Trzciñski et al [14] carried out the effect of aluminum content and of its particle size on detonation characteristics of RDX-based aluminized explosives, and the results showed that when the Al content was 15%, the explosive had better detonation performance
Summary
Since metal powder with high calorific value (e.g., Al, Mg, etc.) can further release a large amount of energy with the explosive products (e.g., H2O and CO2), adding metal powder to the explosive is one of the effective methods to improve the energy of the explosive, which is called metalized explosive [1,2,3]. E weight content, particle size, particle distribution, and particle morphology of aluminum can have a great influence on the detonation performance of aluminized explosives [12,13,14,15,16,17,18,19]. Trzciñski et al [14] carried out the effect of aluminum content and of its particle size on detonation characteristics of RDX-based aluminized explosives, and the results showed that when the Al content was 15%, the explosive had better detonation performance. Feng et al [22]studied the effect of aluminum powder content and particle size on the air blast performances of cyclotetramethylenetetranitramine (HMX) based explosives. Us, in this work, the detonation performance and air blast performance of RDX-based explosives with different aluminum powder content were tested, respectively. Advances in Materials Science and Engineering aluminum powder content were studied intensively, and energy release mechanism was deduced, correspondingly
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
