Using the plane wave pseudo-potential (PWP) and the general gradient approximation (GGA) methods based on the density functional theory, we performed an ab initio investigation of thermal dynamics of ZnSe in zinc-blende (ZB), rock-salt (RS) and wurtzite (WZ) phases.The lattice parameters, equation o...

In order to evaluate the structures of magnesium end-member pyroxene polymorphs (MgSiO₃) under different pressures, first-principles theoretical calculation on low- and high-pressure phases, with space group Pbca, P2₁/c, C2/c, P2₁ca respectively, was conducted under pressures up to 30 GPa.The bulk m...

To study the effect of gas concentration on kinetic characteristics of gas explosion in a closed space, we simulated the gas explosion with different gas concentrations using a constant volume reactor model.The results show that with the increase of the initial gas concentration, the final temperatu...

Adding aluminum powder into emulsion explosive can increase its explosion heat and work capability, but also raise its heat sensitivity.In order to study the effect of the aluminum particle size on the thermal stability of the emulsion matrix, the thermal decomposition characteristics of the emulsio...

One-dimensional plate impact experiments were performed to study the double shocks to detonation transition and Hugoniot state in the HMX-based explosive JOB-9003.The flyer was a combination of sapphire and Kel-F, which could pass two different pressure waves after the impact.We measured the particl...

The shaped charge jet can be applied to explore and enlarge the escapeway for drivers and passengers trapped in an ignited bus due to its special cutting ability.In this research, we established a numerical model of this scheme to study the performance of the shaped charge jet by using the ANSYS/LS-...

The technology of preparing coatings using a shaped-charge explosion was briefly introduced and employed to produce coatings of WC/Co (10%, mass fraction of Co) on the surface of the charge's substrates.The properties of the coatings were analyzed and characterized by means of X-ray diffraction anal...

The shock wave generation characteristics of underwater plasma intense sound source were analyzed and, based on the superposition of shock waves, a multi-electrode array bunching scheme was proposed using the interval consistency between the shock wave formation and the triggered switch flow.The mul...

The two-stage light gas gun is a conventional device for accelerating a projectile commonly chosen for research owing to its wide range of launching velocities, good repeatability and flexible work environment, and is widely used in studies of high pressure physics, space debris protection, and mech...

Granules can be accelerated to a high velocity using high-power lasers.We applied this technique to the process of mixing granules with gas to investigate the high speed gas-solid two-phase flow transportation.Optimization of target design and adjustment of laser parameters were adopted to control t...

In the present work, based on the nonlinear dynamics software AUTODYN, we performed a three-dimensional simulation of the instability process of the aluminum honeycomb sandwich panels under blast loading.By establishing the solid model of aluminum honeycomb sandwich panels with different parameters,...

In this work different modification features were designed for the study of the fracture characteristic and mass abrasion of projectiles with local modification, normal impact experiments were performed on typical RHA targets at velocities ranging from 380 to 500 m/s, and the failure mode and mass l...

The damage modes and resistance performance of the annular pre-cut metal target impacted by the projectile were studied by experiments and numerical simulation.Influences of the projectile nose shape, the diameter as well as the depth of the annular groove on the resistance performance of the target...

The split Hopkinson pressure bar (SHPB) technique has been widely used to measure the dynamic strength enhancement of concrete-like materials at high strain rates ranging from 10 to 10³ s^-1.In this research, computational simulation models were employed to obtain a better understanding of this techn...