The 6061 aluminum alloy is an important raw material for aluminum liner carbon fiber full-wrapped composite gas cylinders, whose hydrogen compatibility determines to a great degree the safety and reliability of gas cylinders.However, the data is lacking in China concerning its hydrogen compatibility...

We designed a built-in graphite heating assembly, called "Bridge", based on a domestic 6-8 type static high pressure apparatus and using the cut-apex three-segment 36/20 assembly, and obtained the relationship between the heating power and the temperature using the high pressure in-situ measurement ...

Ternary Al_xGa_1-xN alloy is an important semiconductor for devices in the ultraviolet and visible parts of the spectrum.So far, most studies of high Al content Al_xGa_1-xN alloy were mainly focused on their properties under ambient pressure and at room temperature but few on their high-pressure behavio...

The high pressure effect on layered lithium cobaltite oxides (LiCoO₂) was investigated using synchrotron X-ray diffraction (XRD) up to 20.3 GPa.In this pressure range, no structural transition was observed and the crystal structure of LiCoO₂ keeps stable; therefore, the compressibility of the parame...

In order to study the influence of the interaction between the jet and the target on the penetration performance, a pure copper target and a carbon steel target were penetrated by a titanium alloy shaped charge jet.The results show that both the hole diameter and the penetration depth of the pure Cu...

Using a two-stage light gas gun and FPGWI (flier-plates with graded wave impedance), the free surface velocities of 93 tungsten alloy (93W) were measured at the impact velocities of 2.12 km/s and 5.02 km/s respectively and the experimental data were analyzed based on the shock wave theory.The result...

Numerical simulations were carried out to study the perforation of 12 mm thick Weldox 460E steel targets subjected to impact by 20 mm diameter rigid projectiles.Assuming the same mass, the cone angle of the conical-nosed projectile varied ranging from 10° to 180° and the caliber radius head of the o...

The dynamic processes of the fragments driven by single and double layer charges were numerically simulated using LS-DYNA and the initial velocity and the distribution of the preformed fragments were obtained.The effects of the initiation positions and the explosive parameters of the double-layer ch...

Based on the mechanism of explosive interaction between the armor and the jet, the present study aims to design a new structure for the reactive armor with a greater resistance against the jet interference, called multi-layered angle reactive armor with a variable angle.The effects of different armo...

K9 glass is often used to study the generation mechanism of failure wave and the dynamic fracture property of brittle materials under impact loading.However, the research on the optical property of K9 glass is often ignored due to the impact pressure limit.In this work, through the plane impact expe...

Symmetric plate impact experiments were performed using a two-stage light gas gun to investigate the dynamic response and optical properties of polymethylmethacrylate (PMMA) under shock loading.The particle velocity of the flyer/sample interface, the shock velocity, and the refractive index of the s...

The high pressure micro water jet nozzle is often seriously worn and its resolution is difficult to further improve.To address this problem, a new method of the micro water jet under the constraint of the gas flow was presented in this paper.Using numerical simulation, the process of the jet was exp...

Concrete is a widely used engineering material and it is of great significance to study its dynamic properties.The tensile strength of concrete materials is obviously affected by the strain rate's hardening effect.Obvious difference exists in the relationships of the dynamic increase factors (ψ_DIF) ...

Porosity and water content are typical properties that have a significant influence on the macroscopic dynamic behavior of rock materials, which further on affect the cratering behavior under high velocity impact.This paper was focused on the impact cratering morphology and studied the characteristi...

Recently, the moving mesh method has received plenty of attention in the numerical computation areas owing to its capability to improve effectively the calculation precision on the shock waveplane.This paper describes a moving mesh method that simulates the shock wave's propagation in condensed matt...

The blast load generated by energetic materials in a confined space consists mainly of transient shock waves and the long-lasting quasi-static overpressure.In order to investigate the effects of the size of venting holes on the characteristics of the quasi-static overpressure in a confined space, a ...

Propane is one of the major constituents in petroleum gas, and its concentration distribution and flammability in the air is the basis of safety measures for petroleum gas.The influence of concentration distribution on the flammability of the propane-air mixture was analyzed using numerical simulati...

To study the specific kinetic energy threshold of impacting initiation covered explosive B by six-prismed tungsten fragment, an experiment of impacting covered explosive B by fragments was designed and carried out.Based on the experiment data, using the Autodyn-3D finite software, simulation models ...

In order to avert the mutual interference that occurs between the armor piercing discarding sabot and the muzzle brake when the armor piercing projectile ejects out of the gun barrel, a novel sabot was designed based on the traditional saddle-shaped sabot.The discarding mechanism of the novel sabot ...

On the basis of the interaction of the plate charge with the shaped jet and in view of the greater penetration capability required for the large caliber plate's more concentrated charge, this article contrasts and compares the shaped jet interference capability of the single plate charge, the double...