CaF₂ nanocrystals with a size of 11 nm have been investigated using X-ray diffraction technique under high pressure. A phase transition from the fluorite structure to the α-PbCl₂-type structure has been observed at 12 GPa, which is much higher than the value observed in the bulk CaF₂ and slightly lo...

Germanium is a semiconductor with good performances of high carrier mobility and narrow band gap at ambient conditions. Under high pressure, it undergoes serials of polymorphs similar to the case of silicon, and the attractive characteristics in its high pressure phases such as metallization and sup...

Mechanoluminescent materials are widely used in stress sensing, recording and other fields because of their strong luminescence brightness, high force sensitivity, good stability and no need for external bias or ultraviolet irradiation. However, little research has been conducted on dynamic impact r...

On the basis of traditional belt type ultra-high pressure die, a new type of prismatic cavity ultra-high pressure die was studied to obtain higher bearing capacity and larger volume of sample cavity. It is characterized in that the cemented carbide cylinder is discrete and combined, and the inner pl...

Lattice structure is widely used in lightweight components and pressure-bearing structures due to its light weight, good pressure-bearing performance, and high specific stiffness. In this study, a hollow lattice structure was manufactured by selected laser melting (SLM) technology. A combination of ...

The mechanical strength, molecular structure and thermal properties of Qtech T26 anti-explosion polyurea (T26 polyurea) were studied by wide-angle X-ray diffraction (WXRD), differential scanning calorimetry (DSC), scanning electron microscope (SEM) and contact explosion experiment of polyurea coated...

To study the dynamic response characteristics and protective effectiveness of sandwich composite structure subjected to internal explosion load in a cabin, small scale structure model experiments and finite element numerical simulations were performed, and the propagation and distribution characteri...

Benefitted by the 3D printing technologies, metallic lattice materials have gained remarkable development. Energy absorption is one of the most important applications for lattice materials. This paper presents our recent work on the energy absorption of polycrystal-like lattice materials. Inspired b...

In order to study the deformation and failure of the thin plate under impact of debris cloud in the multi-layer structure, a series of hypervelocity impact experiments on multi-layer structure are carried out. The experimental results showed that typical failure characteristics of the thin plate und...

In order to investigate the internal explosion damage effect of reinforced concrete frame-masonry wall, the dynamic response and failure characteristics of masonry walls under internal explosion were studied. Based on numerical simulation and theoretical analysis, the failure mechanism and failure t...

The dynamic compressive strength of concrete material not only has obvious strain rate strengthening (hardening) effect, but also has obvious temperature weakening (softening) effect. Under the combined condition of strain rate and temperature, there are not only clear strain rate inflection point i...

In order to study the mechanical response characteristics of rubber under large loading strain rates, a strain-rate-dependent visco-hyperelastic constitutive model is established. The nonlinear and the strain-rate-dependent elastic behavior are characterized by the hyperelastic constitutive model an...

In order to study the rebar effect on perforation into concrete targets, the equivalent mixture model of reinforced concrete is established based on the mixture theory. Meanwhile, the model of steel equivalent to steel plate and the plain concrete slab model are given. The residual velocities, the p...

In order to improve the damage effectiveness of aimed warhead, the influence of sequential initiation parameters on damage effectiveness of aimed warhead is studied. The initial power parameters of fragments under different sequential initiation parameters are studied by using LS-DYNA finite element...

To explore the accumulative damage problem of the hull girder subjected to multiple underwater explosions, the influences of explosive equivalent, stand-off distance, and the number of explosions to the hull girder were studied by ultilizing of AUTODYN software together with testing methods. The res...

In order to study the energy output characteristics of the RDX-based aluminum explosive (JHL-X) and its energy level evaluation method, the explosion heat value and underwater explosion of JHL-X were tested through adiabatic calorimeter, underwater explosion system, and air blast system. Energy, gro...

In order to study the expand-rupturing process and the radial velocity distribution of the elliptical cross-section natural fragment warhead shell driven by detonation, a three-dimensional model of the elliptical cross-section warhead was established. The AUTODYN-3D software was used to simulate the...

In order to study the response law of composite charges with different structures in the process of slow cook-off, the cook-off bombs filled with $\varnothing$19 mm single charges of explosives JH-2 and JHB and $\varnothing$30 mm composite charges were designed. The temperature-time curves of sing...

According to the energy conversion mechanism of rock failure and the overall failure criterion of element, a multi-parameter rockburst criterion considering the releasable strain energy accumulated in rock, the critical value of surface energy required for rock failure, and the brittleness coefficie...

In order to effectively reduce the disturbance derived from the vibration of the presplitting blasting in the slope rock mass and surrounding structures, it is important not only to pay attention to the vibration damping effect of the presplitting, but also to optimize the blasting parameters and in...

The quality of aquatic products decreases after fishing due to the action of microorganisms, endogenous enzymes, lipid oxidation, and other factors. Appropriate treatment can delay aquatic products deterioration. The ultra-high pressure technology (UHP) has the advantages of uniform pressure transmi...