In this paper, to find out about how the inlet pressure influences the supersonic liquefaction of natural gas mixtures, we established a three-dimensional mathematical model for the supersonic condensation flow of the methane-ethane mixture gas, obtained the axial parameters along the Laval nozzle, ...

The structural, elastic and thermodynamic properties of Mg₂Si and Mg₂Ge phases under pressure were calculated using the first-principles based on the density functional.The calculated results indicated that the lattice parameters under 0 GPa are fairly consistent with the experimental value and othe...

In this paper we developed an experimental technique and numerical simulation method that we then adopted to investigate the Rayleigh-Taylor instability in metallic materials driven by explosion.We studied experimentally and numerically the growth of the Rayleigh-Taylor instability in an explosion-d...

A high-precision and resolution shock capturing scheme is of great significance for numerical simulation of the complex flow field containing shock waves.In this study, to improve the convergence accuracy of the conventional third-order WENO-Z scheme at the critical points, we firstly derived the su...

In this paper we analyzed the shock wave breakout time shift at the sample/window due to the flyer velocity shift and the time sequence relationship in the simultaneous measurement of the dynamic emissivity and the radiance.Then, we designed the fiber pins with a total reflection coating film at the...

In this paper we measured the Hugoniot data for JB-9014 explosive by measuring the times when the shock wave reached the surfaces of the explosive sample and the particle velocity at the sample/window interface on a gun using PDV.Calculating the difference between the times when the shock wave reach...

In the present work, we conducted the quasi-static compression-shear experiments on the closed-cell aluminum foams using an improved testing machine and installing beveled bars and a column sleeve.By changing the angle of the inclined beveled bars we obtained the mechanical properties of the aluminu...

Reinforced concrete structural members subjected to impact loads behave quite differently as compared to those subjected to quasi-static loading, with their failure mode becoming more complex.In this work, by introducing the strain rate effect of reinforcement in the trilinear model of the reinforce...

In this paper, we studied the mechanical properties of tungsten alloy spheres in sintered and polished states using the quasi static test and the dynamic loading test, observed their metallographic structure and damage mode before and after the test using SEM, and analyzed the causes leading to thei...

To identify the properties of the three-wave point for aluminized explosives in the near-earth air blast, we simulated the explosion process of 3 kinds of RDX-based aluminized explosives, i.e. HL-01 (RDXph), HL-02 (85% RDXph+15% Al) and HL-03 (70% RDXph+30% Al), using the ANSYS/AUTODYN software.The ...

In the present study, we redesigned the structure of a depleted uranium alloys liner to analyze its penetration performance using numerical simulation results on the basis of a copper liner, and compared the penetration capability of two liners, made of copper and uranium-niobium alloys respectively...

A monolithic metal plate is usually replaced with a double-layered metal target with the same thickness to improve the ballistic limit in practical engineering.This paper presents a theoretical study of the perforation of a double-layered metal target without spacing by a flat-nosed projectile.Based...

Aiming at the problems concerning the application of tantalum in a shaped charge warhead, we investigated the influences of the arc-cone tantalum liner's structural parameters (cone angle, wall thickness and radius of curvature) on the formation and penetration performance of EFP using the LS-DYNA f...

In the present work the process of the jet penetrating the interval target of a water protection layer was observed using flash X-ray photography, the variations of the jet tip velocity and the distribution characteristics of the metal particles and shock waves in water were obtained, and the phenom...

In the present study we fabricated a thermobaric explosive with 3 kinds of aluminum powders (40 nm, 3 μm and 35 μm) to study the influence of the aluminum particle size on the explosive energy output of the thermobaric explosive in a confined space.We measured its shock wave pressure histories at 1....

The initiation criterion of heterogeneous explosives is important for weapon design and safety evaluation.In this paper, based on Kim's elastic-visco-plastic "hot-spot" model, we numerically solved a temperature rising model of a local hot-spot inside the explosive, and obtained the initiation thres...

In this study experiments were carried out in a round tube, 5 800 mm in length and 48 mm in inner-diameter, filled with orifice plates, to investigate the detonation of hydrogen-air mixtures and stoichiometric hydrogen-methane-air mixtures, and the DDT (Deflagration-to-Detonation Transition) limits ...

In the present work we calculated the shock wave energy and bubble energy of thermobaric explosive to study the afterburning reaction of the thermobaric explosive using the double container gas charging device and underwater explosion test.Through the study of the energy output structure of the unde...

Detonation velocity is one of the main parameters in explosive welding where glass microsphere is used as a sensitizer and diluent.In this paper, the effect of the glass microsphere on detonation velocity of emulsion explosive was explored.The honeycomb-structured explosive manufactured using a hone...

In this paper we studied the variation of the minimum ignition temperature of coal dust layer with its metamorphism, particle size and thickness using the minimum ignition temperature measurement system.The results showed that, with the gradual increase of its degree of metamorphism, the minimum ign...

In order to explore the effects of high pressure on the texture and quality of fruits and vegetables in different varieties, we selected 5 kinds of fruits and vegetables with different density, water content, microstructure and texture to analyze their data under different conditions of ultrahigh pr...