The research on hydrogen under high pressure has always been a hot topic both in experimental and theoretical physics, the enthusiasm is rooted from the pursuit of its pressure-induced metallic state – metallic hydrogen. The pressure induced metallization of hydrogen is an electric phase transition ...

Barium germanate (BaGeO₃) was studied using double-sided laser-heating diamond anvil cell (LHDAC). At ambient conditions, BaGeO₃ has a pseudowollastonite structure. At about 12 GPa, BaGeO₃ crystal begin to translate into an amorphous phase. The amorphous BaGeO₃ was further pressurized to about 22 GP...

The fabrication process of the high-entropy alloys (HEAs) at the atomic scale was investigated numerically through molecular dynamics (MD) approach, with which the micro-structures of Al_xCoCrFeNi were analyzed. The mechanical properties of the fabricated specimens with different Al contents subjecte...

The motion relationship between shock wave and fragment directly determines the coupled damage effect on the target. In the present study, the finite volume method and mesh adaptive technique are used to study the motion of the circular rigid body, the attenuation of the shock wave and the motion la...

During the preparation of nano TiO₂ particles via the gaseous detonation method, a portable nano-powder collection platform was located inside the gaseous detonation tube where the nano-TiO₂ powders were collected based on the detonation reaction. The growth mechanism of gaseous detonation preparing...

Damage localization was performed for the typical carbon fiber (CF) and glass fiber (GF) reinforced epoxy composite laminates through in-situ measurement technology. The electrode array was developed by utilizing the conductivity of CF reinforced epoxy composite laminates. The influence of plate thi...

The dynamic fracture behavior of material containing helium bubbles is the focus of many research fields. In this work, the spall damage of pure aluminum containing boron inclusions or helium bubbles is studied by plane impact experiments. The experiments were done for three types of targets: pure a...

Ceramics is commonly used as ballistic resistant material due to lightweight and high strength properties. However, due to its brittleness, the use efficiency of ceramics is low, and local breakdown often leads to the breakage of the whole ceramic. In order to improve the use efficiency of ceramics,...

In order to resolve the problem of martyred detonation of insensitive munitions or fuzes during combat readiness and logistical storage, numerical simulation of detonation sequence of the fuze under shock wave was carried out by using nonlinear finite element method. The growth course, propagation l...

Using vinyl ester resin prepreg and winding method, a ECR corrosion resistant glass fiber reinforced epoxy resin matrix composite pressure vessel was manufactured. The strain variation of the pressure cylinder was measured in the hydraulic test using the electrical method.And the strain response of ...

Based on the Kirchhoff thin plate theory and Hamilton principle, the vibration control equation of composite plate is established. The equation is simply supported on three sides and fixed on one side with initial geometric imperfections. The expression of buckling critical load is obtained. The num...

Inspired by the microstructure of natural bamboo, a new bio-bamboo thin-walled tube was designed by introducing double-rhombic ribs between inner and outer tubes on the basis of the traditional double-circular tube structure. Based on the theory of simplified super folding element, theoretical model...

Based on the half-disk layered rock sample with central straight cutting groove, tests on fracture performances of layered phyllite were conducted, and the finite element numerical model of layered rock was developed. The influences of bedding dip angle, bedding strength, bedding thickness, span and...

To study the response characteristics of the fuse with venting structure, the self-designed fuse venting device is used to study the effect of venting device on the reaction violence of the fuse under cook-off. The results show that under slow cook-off, the reaction violence of fuse is deflagration ...

In order to study the problem of preliminary ballistic deflection when a penetration warhead with truncated ovate nose penetrates target obliquely, the theoretical model and simulation model are set up to analyze the effects of truncated ovate nose diameter on the preliminary ballistic deflection of...

To study the influence of different algorithms on penetration simulations of granite target subjected to projectile, Lagrange, SPH-Lagrange coupling and SPH (smooth particle hydrodynamics) algorithms are used for penetration simulations, based on Lagrange and SPH algorithms within LS-DYNA software. ...

Aiming at the research on the penetration behavior of rigid oval short rod projectile to semi infinite thick steel target, the ballistic test of $\varnothing$12.7 mm projectile penetrating 45 steel at different landing speeds is carried out by using 12.7 mm ballistic gun. The penetration behavior o...

The overpressure and its oscillation of gas explosion in long straight space will endanger personnel and structures. In order to reduce the potential hazards, a numerical model of gas explosions in long straight tube was established based on the CFD software FLACS and was verified by using the exist...

A large number of methane explosion accidents show that premixed methane/air gas explosion is easy to cause huge casualties and property losses. The influence of the water mist cooperating with sliding device on the explosion characteristics of methane was explored by using the 10 cm × 10 cm × 100 c...

In order to predict evolution of permeability for reservoir in the process of coal measure gas exploitation, based on the stress-strain constitutive of reservoir and the cubical relation of permeability and porosity, the model of the effective stress-permeability of reservoir was presented, which co...