The dynamics of phase transition of tin under ramp wave loading was studied with experiment and simulation. The ramp wave compression experiment of tin was carried out with photonic Doppler velocimetry (PDV) and compact pulsed power generator CQ-4. The velocity wave profiles obtained experimentally ...

Based on the first principle of density functional theory, the crystal structure of MgN₈ was predicted in the pressure range of 0–100 GPa by using CALYPSO structure search technique and VASP software. After systematically studying the predicted structure, it was found that the enthalpy of α-MgN₈ cry...

The effect of rapid compression on the stability of olivine structure was studied in this work. In the first group, the olivine samples were rapidly compressed to 3 GPa at 293, 373, 473, 573, 673 and 773 K respectively. In the second group, the olivine samples were sintered for 2 h at 873, 973, 1 07...

Based on density functional theory, a ZrBeO₃ crystal model of perovskite structure was constructed. The binding energy of the crystal model was calculated, and the thermodynamic stability of the structure was calculated. The elastic constant of the structure under different pressures was calculated,...

High entropy alloy (HEA) has high strength, high hardness, high wear resistance and corrosion resistance which traditional alloys do not have, and has broad application prospects. The mechanical properties of AlCrFeCuNi high Entropy Alloy (HEA) under axial loading were also studied in this paper. Mo...

This study investigated the applicability of three p-$\alpha$ models and p-$\lambda$ model for predicting shock compaction response of heterogeneous W-Cu powder mixture. Mie-Grüneisen method and Barry isobaric mixing method were employed to predict the Hugoniot of W-Cu powder mixture with the same...

High-speed particle-laden flow has important applications in astronomy, natural disasters, industrial safety, medical industry, and national defense. In this work, a direct numerical simulation method based on the stratified flow model is used to study the interaction between a planar shock wave and...

The high-speed gun is used to study the impact of quartz glass ball on rigid target plate. The crushing process and failure mode of the ball at different speeds are analyzed. When the impact velocity is lower than the critical failure velocity, the quartz glass ball rebounds from the target plate, a...

Nacre inspired composite materials with different assembly modes were fabricated by photocurable 3D printing. The composite materials consist of two kinds of matrix materials. The tension mechanical properties, fracture and energy dissipation mechanism were analyzed by quasi-static tensile tests com...

In order to study the dynamic response of reinforced concrete wall under impact load, a finite element model of reinforced concrete wall is established by means of ANSYS/LS-DYNA. The impact mass is 2 t and the impact velocity is 3 m/s. The effects of axial compression ratio, wall width and boundary ...

In order to explore the influence of the scale effects on the timing of fragmentation and shock wave, the key parameters affecting the location of fragmentation and shock wave are determined by the dimensionless analysis and explosion theory for the prefabricated fragment warhead. This paper propose...

The state equation of water, artificial viscosity coefficient and mesh size have a great influence on the numerical results of underwater explosion shock wave. In order to improve the simulation accuracy of underwater explosion shock wave, the peak pressure and specific impulse of the conventional T...

The essence of supercavitating projectile penetration is the dynamic response of a special underwater structure subjected to high-speed impact load. In this paper, the damage effect of 12.7 mm supercavitating projectile penetrating typical underwater target shell is studied. Based on LS-DYNA finite ...

In order to study the effect of nose cabin on projectile low speed and high mass during the penetration of metal plates, a finite element analysis model of blunt projectile with nose cabin was established. Based on the mechanical properties, nose cabin can be regarded as equivalent to light foam alu...

CH₄-H₂ mixture explosion experiments were performed in a 20 L spherical explosion vessel with the equivalence ratio of 1. Gas proportion and ignition energy were varied to explore their effects on the explosion pressure and intensity. It is found that higher hydrogen proportion causes higher explosi...

Lithium-ion battery separators act as the physical barriers to prevent contact between the positive and negative electrodes, and their structural integrity is critical to battery safety. In this paper, uniaxial tensile tests were carried out on four kinds of commercial separators, and the effects of...