Abstract The influence of different initiation manners on the forming features reactive material jets was investigated using AUTODYN-3D simulation software. numerical findings demonstrate that, as compared to center point initiation, annular multi-point greatly improves velocity jet head created, but expansion impact is more noticeable during generating process. At and axis jet, there are low d...

This paper presents the simulation of fragmentation warhead using a hydrocode, Autodyn. The goal of this research is to determine the lethal range of such a warhead. This study investigates the lethal range of warheads with and without steel balls as preformed fragments. The results from the FE simulation, i.e. initial velocities and ejected spray angles of fragments, are further processed usin...

The objective of this research is the formulation, implementation, and validation of a numerical method to accurately model and simulate explosion blast and shock waves for the disruption of asteroids. While the cases presented in this paper are not explosions caused by actual nuclear devices, they will aid in validation of the numerical model for future nuclear-explosion simulations. Current w...

Abstract The jet formation and penetration behaviors of shaped charge with a reactive material double-layered liner (RM-DLL) are presented in this paper based on the AUTODYN-2D code. Numerical results show that wall thickness ratio RM-liner to metal has significant influence characteristics composite jet. As increases, tip velocity jet, pressure RM-liner, temperature RM-elements decrease. effec...

The interface characteristics and microstructure formation of TA2-5083 composite plate after explosive welded were studied. Optical microscope electron used to analyze the intermetallic compounds. Furthermore, ANSYS/AUTODYN was adopted calculate simulated by smooth-particle hydrodynamics (SPH) method. results show that most molten metal in wave front stays wave-waist region. There a relative ve...

Abstract The change of the liner material directly affects penetration and damage performance shaped charge. In this paper, Ti-29Nb-13Ta-4.6Zr (TNTZ) was used as charge liner. Autodyn software to analyze jet formation TNTZ liner, then static explosion test conducted liners. following conclusions were obtained: A structure proposed for alloy, simulation shows that a with acceptable L/D ratio for...

Abstract During the PTFE/Al reactive shaped charge jet formation, burst wave generated by explosion of explosive is sufficient to achieve ignition conditions materials (RMS). As a result, RMS will react, resulting in an energy loss from jet. In order research forming features and during liner with diameter 74 mm was prepared X-ray pulses photography experiment performed on formation. And parame...

The shaped charge tandem warhead is an effective weapon against the ERA (explosive reactive armor). Whether the pre-warhead can reliably initiate the ERA directly determines the entire performance of the tandem warhead. The existing shaped charge pre-warhead mostly adopts a metal shaped jet, which effectively initiates the ERA, but interferes the main shaped jet. This article, on the other hand...

Introduction: We have used the Ansys Inc. AUTODYN ® software [1] to hydrodynamically model small particle impacts into aluminium (Al) foil, under the conditions of the Stardust encounter with comet 81P/Wild 2 [2] (i.e., normal incidence, 6 km s -1 ). We compare results of impact models, based on carefully defined particle structures, with three-dimensional (3D) crater shapes reported from Stard...

Recent post explosive control avalanches and the lack of analytical methods for evaluating explosive control have motivated this study to better quantify the effects explosives on snow. Currently, there are insufficient tools for predicting the effects that explosives will have on snow avalanche release. While there is significant practitioner experience, that experience has (on occasion) not a...