Multi-walled carbon nanotubes (MWCNTs) were synthesized via the detonation of methane and oxygen as precursors and ferrocene as catalyst in a sealed stainless steel pressure vessel.Then the MWCNTs were characterized by X-ray diffraction (XRD), transmission electron microscopy and Raman spectroscopy....

Carbon microspheres prepared using the chemical vapor deposition method were treated under high-pressure and high-temperature conditions of about 8 GPa and 1 600 ℃.Based on the volume variation of diamond and molybdenum with the pressure and temperature, we designed and optimized the temperature-pre...

The research of the effect of rapid compression within milliseconds on materials is still in its initial stage.Therefore, it is necessary to improve the rapid compression experimental technology and carry out in-depth research on rapid compression process and its application in materials science.In ...

To assess the suitability of 47Zr45Ti5Al3V alloy used in the future spacecraft in a space debris environment, we performed single and repeated hypervelocity impact experiments on a laser driven mini-flyer system.The crater depth in the recovered target was measured by a surface profile meter.The rel...

To find out about the effect of hardness on the dynamic behavior and the damage parameters of 30CrMnSiNi2A steel, we investigated the quasi-static and dynamic mechanical properties of different steel alloys with the hardness of 31HRC, 36HRC, 45HRC and 55HRC using a universal material testing machine...

From a micromechanical point of view, concrete was considered as a three-phase composite composed of cement mortar, coarse aggregate and interface transition zone (ITZ) between them.In order to study the influence of ITZ on the dynamic mechanical behavior of concrete, we designed a two dimensional c...

Plain concrete exhibits a significant strain rate hardening effect, and the relationship between the dynamic increase factor (DIF) and the corresponding strain rate at high strain rates is obviously different from that at low strain rates.In this paper, we collected and examined a large number of dy...

The Russian pine is widely used in packaging, transportation and penetration test.In this paper, we studied the stress-strain relationship and the failure mode of the Russian pine under quasi-static loading.The results show that the deformations of the pine in the radial and tangential directions un...

After validating our hydrodynamics program and damage model with the corresponding experimental data, we carried out numerical simulation study on the damage and spall mechanism of Sn under the explosive detonation loading.The numerical results show that the damage in Sn sample is related to the loa...

To quantitatively study the air blast wave field characteristics of the explosive charge moving at different velocities, we carried out simulations using AUTODYN software.The simulation results show that the charge velocity exerts great influence on the time-space distribution of the blast wave fiel...

As a novel technique, the magnetically driven ramp wave compression has attracted considerable attention of specialists in hydrodynamics.In this paper, we analyzed the loading process of magnetically driven ramp wave compression.Then we derived the experimental uncertainty transfer equations based o...

To reveal the suppression chemical mechanism of nitrogen and water and to prevent the methane-air explosion more effectively, we designed different schemes with different concentrations of nitrogen and water vapor, and simulated the pressure, temperature and time to peak pressure of the methane-air ...

A reactive material with the density of 5.2 g/cm³ was impacted by high velocity flyers launched by a ∅57 mm powder gun and, for the first time in research, its particle velocities and shock wave histories were measured with embedded electromagnetic particle velocity gauges.The results indicated that...

Numerical simulation and experimental methods were utilized to study the influence of material type on the morphology of the flyer in the field of MEMS booster train based on micro charge involving copper azides.The research results indicate that titanium is suitable for flyer material, while copper...

Based on the analysis of the ignition characteristics of the fragile penetrator, the ignition experiments for No.0 diesel fuel were carried out to investigate the influence of the incident velocity, the incident angle, and the cross-section shape of the projectile and the thickness of the target on ...

In this work high flash-point jet fuel containing different proportions of explosion-suppressive material, called as explosion-suppressive high flash-point jet fuel, was prepared.The liquid fuel combustion and explosion performance evaluation devices were used to measure the explosion parameters of ...

In this paper, we developed a visible light intensified charge coupled device (ICCD) and introduced its key elements including the coupler, the fast pulse power and the high-precision delay synchronization control unit.The test results show that the ICCD's shortest exposure time is 5 ns, and the ima...

In the present work we simulated the process of a sub-caliber projectile moving in the bore of a DAVIS gun using the finite element method based on the LS-DYNA calculation program.By loading the pressure of the gases from the propellant burning on the pushing module, we calculated the stress of the ...

In this work we studied the effect of extreme high hydrostatic pressure treatments (700-1 200 MPa) on the texture and cytoderm microstructure of carrot slices compared with heat treated and untreated samples, and examined the changes of their texture and cytoderm structure during the storage days (7...