Under extreme compression, hydrogen goes through a series of phase transitions, and may transform to an exotic metal predicted by theoretical calculations. The pursuit of metallic hydrogen by the high pressure community is intense due to the predicted room temperature superconductivity and super-flu...

Magnesiosiderite [(Mg,Fe)CO₃] is one of the main carriers for carbon to enter the deep Earth, and the presence of iron will cause great change of mineral physical properties. The effects of ferrous iron’s spin transition on the thermodynamic properties of magnesiosiderite have been studied by first ...

The sensitivity of Rayleigh-Taylor instability of tin driven by explosion to the initial parameters of sample (initial amplitude, wavelength and thickness of sample) and the initial parameters of SG constitutive model are numerical investigated by using an in-house Eulerian detonation and shock wave...

This paper presents a numerical model of the square dispersingdevice for simulating the process of shell failure and fuel dispersion by LS-DYNA software. Combined with the results of the field experiments, this model reveals in detail the influence of the fillet angleand groove depth on the shell ru...

This paper introduces key design techniques for PVDF sensitive element used in dynamic compression experiments. Based on the sensitive element design, electrode design, sensitive element polarization and sealing, PVDF dynamic pressure sensors are well design and produced. We also made dynamic experi...

The shock initiation reaction of A-type insensitive explosive has been investigated by means of the one-dimensional planar impact experiment and photon Doppler velocimetry technique (PDV). In this experiment, a sapphire flyer was launched by the powder gun and then impacted the stepped insensitive e...

To investigate the impulsive resistance property of the carbon fiber reinforced polymer and epoxy (CFRP/Epoxy) laminate, the dynamic response and failure behaviors of the CFRP/Epoxy laminate beam subjected to varying impulsive intensities were experimental studied. The impulsive loading was generate...

Metals are widely used in the defense industry and civil engineering and an understanding of the mechanical properties of metals under intense dynamic loadings is of great significance for the design and assessment of weapons and protective structures. In this paper, the dynamic yield strengths (HEL...

The finite element model of a ceramic beam impacted by a blunt-nosed projectile was established, and the impact damage evolution process of the beam was simulated. The simulation results are in good agreement with experimental results, which confirms the validity of the model. On this basis, the fin...

Exploring the stress and failure characteristics of rock is the key to study the safety of rock underground engineering, thus many scholars expect to make breakthrough in the study of rock constitutive model. In this paper, a constitutive model is proposed to describe the rock under cyclic loading a...

The effect of crystal texture on the numerical results was studied based on the theory of crystal plasticity, and the polycrystalline compression shear sample (SCS) model with texture was established. The influence of micro-grain on the macroscopic mechanical properties in the process of finite defo...

A supersonic earth-penetrating projectile is designed where two different metal materials are used for the projectile’s body. Experiments of projectiles with mass of 25 kg and impact velocity ranging from 1 100 m/s to 1 300 m/s are implemented by a cannon with caliber of 203 mm. The process of proje...

In this work we carried out research on the anti-explosion effect of heptafluoropropane in the process of methane-air premixed gas explosion propagation in equivalent ratio, in order to solve the explosion accidents in the process of gas transportation. This experiment used a horizontal pipeline exp...

Based on the similar model test, the stress wave propagation rule, crack formation mechanism and displacement distribution characteristics of rock mass in the underground anchorage chamber under the simultaneous explosion of concentrated explosive source at top and side of arch are studied by explic...

In order to improve the quality of explosive welding and to solve the problem of high noise and low efficiency, Cu is selected as the flyer plate and Q235 steel is used as the base plate. The LS-DYNA software and the smoothedparticlehydrodynamics (SPH) method are used to design the uniform distribut...