By using first-principles method based on density functional theory, the crystal structures and the electronic structures of Sc, Ti, V and Zr element doped Cr₂B₃ under zero pressure, and their elastic constants and hardness in the pressure range of 0−150 GPa are calculated. According to the calculat...

Geometric structure, electronic structure and optical properties of nitrogen-rich energetic materials (bis 3, 4, 5-triamino-1, 2, 4-triazole)-5, 5′-azotetrazole (G₂ZT) at high pressures are investigated using first-principles based on density functional theory. The calculated results obtained by usi...

Ultra-high temperature ceramics have excellent properties, such as high melting point, high thermal conductivity, and anti-oxidative ablation, and thus are important candidates for reusable heat-resistant parts of hypersonic aircraft. In this paper, high-density and ultra-high temperature ceramic Zr...

In order to understand the deformation and damage behavior of a nickel-based GH4169 superalloy target under the high-temperature and high-speed impact load, a high-temperature loading device of the target was added on the existing ballistic impact gas gun firstly, as well as a synchronous separation...

Fuze control is one of the key technologies in developing warhead. The signal adhesion of deceleration may lead to wrong response of layer-counting fuze. Based on numerical simulation, the dynamic response of a projectile connected with an accelerometer equipment by pressed fitting is obtained durin...

To study the mechanical properties of polyimide, quasi-static and dynamic compression experiments were carried out using the materials testing system (material testing system, MTS) and the split Hopkinson pressure bar (SHPB). The stress-strain curves of the material under different strain rates were...

Sandwich panels, consisting of flax fiber-reinforced polymers panels and polyurethane foam cores, were fabricated by the vacuum-assisted resin injection process. After that, water immersion aging experiments, at four temperatures of 25, 40, 55, and 70 ℃, and low-velocity impacts experiment were cond...

In this paper, an experimental study on spherical water droplets with diameters of 3.7 and 6.4 mm at hypervelocity impacting typical Whipple protection structure (consisting of a buffer plate and a effect plate) was carried out at room temperature, and the damage characteristics of the double-layer ...

Concrete is a typical quasi-brittle composite material with tension-compression asymmetry. When the tensile failure is studied by Brazilian splitting test, different loading methods have great impact on the deformation and failure characteristics of concrete. The quasi-static splitting tests of stan...

Carbon nanotube (CNT) films have broad application prospects in the fields of artificial muscles, electronic shielding, and impact protection, owing to their excellent mechanical and electrical conductivity properties. However, the latest studies mainly focus on the quasi-static mechanical propertie...

The effects of different inner wall surface roughness of 45 steel cylindrical shell on its shear band behavior were studied based on detonation collapse experiments of thick walled cylinder and finite element numerical simulation. The experimental results show that the surface roughness of the inner...

In this paper, molecular dynamics method is used to study the strain rate dependence of HMX-based polymer bonded explosive (PBX) interface under dynamic tension loading. Our results show that the tension strength and elastic modulus of PBX increase with the increasing of strain rate. The fracture of...

The in-plane dynamic mechanical response of the auxetic hexagonal honeycomb under different impact angles, ranging from 0°–10°, and different impact speeds, ranging from 6–100 m/s, is systematically studied based on the corresponding numerical model. A novel formula is adopted for the cross-section ...

In order to improve the mechanical response of cylindrical shell under axial impact load, the laminated cellular cylindrical shells were designed, and their mechanical behaviors were studied by changing the laminated way and the number of cell. The deformation mode and energy absorption characterist...

Based on finite element method-smoothed particle hydrodynamics (FEM-SPH) adaptive algorithm of finite element software LS-DYNA, the damage characteristics of a multi-layer protective structure caused by the hypervelocity impact of a kinetic energy block are numerically simulated. Combined with the d...

In order to improve the impact resistance of fiber composite components under hail load, inspired by the unique double-helicoidal structure of coelacanth scales, a numerical model of the double-helicoidal bionic structure made of carbon fiber reinforced composite was established, and the effectivene...

Thin-walled sandwich structures are commonly used in protective structures due to its lightweight performance and excellent energy absorption. In this investigation, axial deformation behaviors as well as the energy absorption are studied for the sinusoidal corrugated cylinder because of its easier ...

In order to study the load characteristics of underwater explosion for an emulsion explosive, underwater explosion experiments of the emulsion explosive were carried out. By changing critical parameters such as explosive charge mass, explosion distance and depth, the typical parameters of underwater...

Perforated armor can effectively reduce weight while meeting anti-penetration performance. Structural lightweight design of perforated armor has practical engineering significance. Considering the influence of uncertain factors, a reliability optimization design of a perforated armor was realized in...

The distance between explosive roll of surrounding hole is one of the important factors affecting the effect of smooth blasting. Based on the diversion system project of hydropower station in Peru, this paper introduced the blasting design scheme of the project and evaluated the blasting effect. The...