Laser ablation driven is a very promising technology to remove centimeter-scale space debris, however, the irregular geometry of the space debris has very complicated influence on the impulse of the laser ablation, which is a difficulty and hot issue in current related research.In this study, based ...

Using a diamond anvil cell apparatus, we investigated the sodium perchlorate (NaClO₄) by Raman spectroscopy at pressure up to 20 GPa, and calculated the Raman spectra of anhydrite-(Cmcm), monazite-(P2₁/n), AgMnO₄-(P2₁/n), and barite-type (Pnma) structures of NaClO₄ by density function theory.The exp...

In this work, we measured the Grüneisen parameter γ of aluminum in 297-494 K under 2.17 GPa and the γ of sodium chloride in 312-608 K under 1.46 GPa, based on the Grüneisen differential equation γ=(K_S/T)(∂T/∂p)_S (where K_S is the adiabatic elastic bulk modulus), combining the rapid compression method...

The propagation and interaction of the phase transformation waves is a thermal-mechanical coupling process under shock loading.In this research, we investigated the effect of a fixed temperature interface on the phase transition propagating by theoretical analysis combining with experiment.First, on...

In the present work, we developed a high-resolution 3D code based on the FORTRAN platform to investigate the influence of accuracy of WENO schemes on the blast load generated by gas cloud explosion inside a cabin.The 3th, 5th, 7th and 9th WENO finite difference schemes were implemented in the code t...

When simulating the two-dimensional multi-material compressible flows using the Lagrangian method, the distortion of the mesh is often the reason why the process terminates.The dynamic local remeshing is an option to relax the distortion.In this study, we combined the "diagonal-swapping" "edge-split...

Nanoparticles tend to aggregate due to the van der Waals force, and the separation and purification of these nanoparticles are difficult in nanometer scale.In this study, we focus on the separation of two SiO₂ nanoparticles attracted by van der Waals force.Assuming them as being stiffness particles ...

Measuring the dynamic constitutive relation of low-impedance materials which are usually used in the field such as energy absorption and cushion by using a split Hopkinson pressure bar (SHPB) device generally does not require a high impact velocity of bullet but a stable one with little error in the...

In this work we studied the processes of applying pre-stress on SiC ceramics by using the finite element software AUTODYN.We established a model of long-rod projectile of different velocities penetrating ceramics with different pre-stress values to investigate the ballistic performance of the pre-st...

We conducted tests on the dynamic stress-strain relationship of both 30CrMnMoRE and 30CrMnSi at different strain rates using the split Hopkinson pressure bar (SHPB) system to study the mechanical response of alloy metal under high impact, and obtained their dynamic stress-strain curves and yield str...

In this study, we employed the MTS machine to apply a compressive load to the closed cell aluminum foams with different densities (0.322-0.726g/cm³) at different temperatures (25-500℃) under quasi-static state, and obtained the stress-strain curves of the aluminum foam under uniaxial compression and...

In this study, we investigated the dynamic buckling of the functionally graded Timoshenko beam whose property parameters continuously change according to the power function along the thickness direction.Based on the first order shear deformation theory, we derived the governing equation of the dynam...

In this study, we measured the pressure histories of the shock wave after passing through different thicknesses of PMMA card gaps under ∅100 mm plane wave loading by the PVDF piezofilm stress gauges.The experimental results accord well with the simulated results by LS-DYNA, which shows that the shoc...

Based on a Doppler pin system, we studied the influence of a 0.5 mm-thick foam layer and an air clearance on the kinetic characteristic of a 45 steel flyer under the detonation of the RHT-901 explosive, and analyzed the difference in this influence as is shown between a single-flyer assembly and a d...

In this study, we conducted numerical simulations of the oblique perforation of single 1 mm-thick Q235 steel plates subjected to flat-and ogive-nosed projectiles at 0°~60° by invoking the ABAQUS subroutine to introduce a modified J-C constitutive model and a modified three-section failure criterion ...

Based on the Johnson-Cook material constitutive and failure criteria, we established the models of 2A12 thin aluminum alloy plates with a thickness of 2 mm impacted by ogival-nosed projectiles using the finite element software ABAQUS, and studied the influence of the attack angles (0°-60°) on the pr...

In this work we examined and characterized the original velocity and flight velocity attenuation of the nonmetal fragments of a certain low-collateral-damage warhead in combination with its explosive power experiment.We obtained the fragments' original velocity including the shell configuration and ...

According to the characteristics of the detonation loading process in prefabricated fragment warhead, we designed the sliding detonation unit test model, and obtained the initial velocity and the damage of the prefabricated fragments and light shell under two typical arrangements by the X-ray photog...

Based on the traditional explosive reactive armor (ERA), we designed a structure of double-layer ERA with wedged flying-plates, to achieve the best performance in jet disturbing.By using the simulation software ANSYS/LSDYNA-3D, we simulated 3 different schemes of ERA structures, and analyzed the fly...

In this study, we used the ANSYS/LS-DYNA software to simulate the fall test of the cabin warhead in order to predict its safety performance, and obtained the structural stress deformation and charge overload response of the combat simulation of the warhead in different states.The results show that t...

In this work, we researched the influence of a kind of thermal protection coat on the reaction of explosives in projectile by fast cook-off test.Based on the comparison of the reaction state of the test sample with and without the thermal protection coat, the results show that the thermal protection...

The high noise and low efficiency of explosive welding can be improved by the double-sided explosive welding which can clad two composite plates simultaneously and significantly reduce the critical thickness of stable detonation of explosives.In this study, we simulated the double-sided explosive we...