Research On Nano-RDX Sensitivity Characteristics And Its Detonation Performance

In order to improve the sensitivity of high power energetic materials and the security issues of explosive charging, superfine particle technology and experiment are in much progress on energetic materials at home and abroad.RDX has excellent detonation performance, but also a much higher sensitivity, as the application is subject to certain restrictions. Here four nano-RDX with different size respectively, their mechanical friction sensitivity, impact sensitivity, shock wave sensitivity and detonation performance were studied by experimental, theoretical and numerical simulation method in this paper.As the result of the impact and friction sensitivity, we obtained the order of mechanical sensitivity for the four different particle size nano-RDX. Also their detonating mechanism cf mechanical sensitivity were analyzed. With underwater explosion experiments of the small gap test, nano-RDX shock sensitivity was carried out. Again we obtained the50%detonation probability gap thickness for the4target samples. The law of the shock sensitivity and underwater explosion energy output characteristics were analyzed. Within this particle size range mentioned before, by Linear Hypothesis on the particle size and the gap diaphragm thickness and with linear fitting, the two factors have good linear relevance. The relationships between the shock wave sensitivity with the nano-RDX particle size were analyzed by using the shock wave initiation mechanism.In the end, the explicit dynamic finite element program—the AUTODYN numerical simulation software was adopted. By setting up the numerical simulation model of the small gap underwater explosion experiment, we studied the shock wave propagation in the polyethylene gap. Measured nano-RDX initiation process and acquired the detailed propagation process of shock wave in water. Comparison with the experimental pressure curves and simulation results, the two have good consistency.