It is generally known that phase evolution characteristics of materials under hypervelocity impact obtained are limited by experiments. In this paper, the material point method and GRAY three-phase equation of state were combined to simulate the hypervelocity impact of Cu-Cu, Ni-Ni and Al-Al at diff...

Silicon (Si) is considered as one major light element in Earth’s inner core, but its content is still controversy. In order to constrain its content in the inner core, using first-principles calculation method, we constructed four different supercells of Fe-3.24%Si and investigated the effects of ce...

In this study we investigated the interaction of carbon with iron in the (Mg,Fe)SiO₃ bridgmanite under the conditions corresponding to the Earth’s lower mantle (36–88 GPa, 1 850–2 800 K) using a laser-heated diamond anvil cell. Synchrotron X-ray diffraction measurements of the run products showed th...

The electrical conductivity of single-crystal San Carlos olivine was measured up to 19 GPa at room temperature in a diamond-anvil cell, coupled with a complex impedance spectroscopy. The pressure was determined by in-situ ruby luminescence and Raman shift of silicone fluid. We found that the electri...

Garnet is an important component of the upper mantle and mantle transition zone, and its properties under high temperature and pressure are of great significance to understand the composition, structure and dynamic process of mantle. Therefore, the crystal structure and elastic properties of pyrope,...

Understanding the physical properties under high pressure of hydroxylbastnäsite-(Ce), an important hydrous rare earth element (REE) fluorocarbonate mineral, can provide key information to explore the effect of fluorine and hydroxyl on high-pressure behavior of carbonate minerals. Here Raman spectros...

Compressibility of FeNiP ($P\bar 62m$) has been studied up to 23.4 GPa by using diamond anvil cells (DAC) combined with in situ synchrotron X-ray diffraction (XRD) at room temperature. FeNiP remains the hexagonal structure at experimental pressure range. The pressure-volume (p-V) data has been fitte...

Based on quantum theory and atomic cluster theory, using many-body expansion method and the ab initio method, a novel expression is presented for calculating the cohesive energy of rare-gas solids (RGS) (RGS=He, Ne, Ar, Kr) and studying the cohesive energy contribution to the highly compressed chara...

Nearly fully dense W-Al energetic structural material (ESM) was successfully prepared by explosive sintering with W and Al powder with different particle sizes. It was found that shock wave pressure is the dominant factor for powder densification and the particle size of powder has a significant inf...

The theoretical mode of velocity attenuation of rigid mass and the stress wave propagation in layered cellular materials under dynamic impact loading has been proposed based on the 1-D wave theory and the dynamic response process of a foam rod strike by a rigid mass has been studied. A finite elemen...

To investigate the ubiquitiformal characteristic of the crack extension path in a heterogeneous quasi-brittle material under the dynamic tensile loadings, a ubiquitiformal model is developed in this paper, and the calculated numerical results for the ubiquitiform complexity are in agreement with the...

The semi re-entrant honeycombs presented unique deformation modes due to its characteristic of zero Poisson’s ratio. The impact resistance of the semi re-entrant honeycombs under in-plane impact load was compared with that of the traditional positive Poisson’s ratio (regular hexagon) honeycombs and ...

In order to investigate the crack propagation law of double layered laminated glass (LG) under impact load, a model for calculating the dynamic response of the both sides support LG under the impact of a spherical hammer head is established by using the zero-thickness intrinsic cohesive method. The ...

The complex physical process is always accompanied with hypervelocity impact. In this paper, the physical process of rod-shaped cylindrical tungsten alloy bomb impact thin steel target has been studied. The impact process model and fluid dynamic information of every particle were obtained by means o...

According to the character of jet formation in shaped charge device, a new type of charge assembly, with metallic liner of aluminum-copper bond fabricated by explosively welding technique, has been proposed in order to acquire the improvement on penetration capability from such charge. The device is...

An open explosion loading experiment was designed for three differently laminated carbon fiber composite laminates to study the dynamic mechanical behavior of the laminates under different explosive masses and explosive distances. Based on two high-speed cameras, an experimental measurement system f...

In order to study the effect of Al/O ratio on underwater explosion load and energy output configuration of aluminized explosives systematically, four kinds of aluminized explosives are taken into account, and their Al/O ratio are 0, 0.16, 0.36 and 0.63, respectively. Coupled Eulerian-Lagrangian meth...

In order to study the anti-penetration performance of Q235 steel multi-layer plate, we carried out a $\varnothing$9.45 mm spherical fragment of tungsten alloy to penetrate the 7.2 mm and (3.6+3.6) mm Q235 steel double-layer plates, and obtained the corresponding ballistic limits. On this basis, we ...

The split Hopkinson pressure bars (SHPB) and drop-weight are used to study the effects of sintered and unsintered processes on the dynamic mechanical properties and reaction properties of reactive fragments under impact. The results show that the sintered reactive fragments have better mechanical pr...

Under the implosion of the carbon fiber composite (CFRP) shell embedded in dense inert metal particle, the damage elements dominated by dense inert metal particles will be formed. Thus, accurately acquiring and predicting the scattering performance of heavy metal particle cluster driven by internal-...

The safety of power batteries is one of the important factors that restrict the rapid development of electric vehicles. In this paper, cylindrical 18650 power lithium ion batteries with different state-of-charge (SOC) were compressed in the radial and axial directions respectively to study the mecha...