The method of preparing metastable materials (e.g.amorphous materials) by rapid compression-induced solidification and related research progress are reviewed in this paper.The authors prepared successfully bulk amorphous polymer PET (ethylene terephthalate), amorphous polymer PEEK (polyetheretherket...

With the elemental boron powder and chromium powder as raw materials, CrB₂ compound was prepared successfully at 6 GPa and 1 200 ℃ by using high temperature and high pressure method.X-ray diffraction (XRD), X-ray energy dispersive spectroscopy (EDS), hardness tester and scanning electron microscopy ...

Bound charges of poled PZT 95/5 ferroelectric ceramics will be released under shock wave loading to form a high-power electrical energy output.For a shock loading perpendicular to the polarization direction, a model describing the depolarization and discharge process of PZT 95/5 ceramic by normal sh...

Air/He and air/R22 cylindrical interface instabilities were calculated by gas kinetic scheme (GKS) under the assumption that the components have the same temperature and velocity in the cell.The density distributions at different time, the displacement histories and the average velocity of character...

In order to test the impact mechanical properties of geopolymer concrete (GC) effectively, the slag and fly ash were used to fabricate the highly fluidized C30 GC.Based on the prepared GC, the parameter control of split Hopkinson pressure bar (SHPB) system was investigated, and the law between strik...

There is an increasing attention in determining the dynamic mechanical properties of low-impedance and brittle materials, but it is difficult to acquire exact experimental results by a conventional Hopkinson pressure bar test because of their small failure strain and weak transmission strain signal....

If the bandwidth of measurement system can not cover completely the effective bandwidth of a blast wave signal, a dynamic error is inevitably introduced.By using the shock-tube based dynamic calibrated data, a dynamic mathematical model of measurement system is established, and a dynamic compensated...

In order to provide basic data for quickly predicting JWL (Jones-Wilkins-Lee) parameters of multi-component explosive with any component ratio, this paper presents a theoretical approach for quickly determining the expansion characteristics of cylinder driven by detonation products of multi-componen...

To explore the afterburning reaction of TNT explosive, the underwater explosion method and an experimental device designed to enhance the afterburning reaction of explosives were used to investigate the energy output structure, and the afterburning reaction energy in different ambient atmosphere was...

Fire extinguishing by explosive water mists is a new method with high efficiency and rapid fire-extinguishing performance.In order to study the process of explosive water mists acting on oil fire, a CCD camera, a fine thermocouple and an infrared thermometer were used to capture the images of fire e...

In order to investigate the influence of particle size of powder material and its distribution on the properties of powder liner, W and Cu powders were chosen as the main material of shaped charge liner, and a bit of bismuth powder was added to increase the liquidity of the mixed powders.The particl...

At present, there is a lack of systematic research on the shaped charge jet penetration under large normal angle condition, especially the special phenomenon of jet ricochet.Three ricochet models, including Tate model, Rosenberg model and compressible fluid-mechanics model, were comparatively analyz...

Numerical simulation and analysis of jet penetration in ceramic/rubber/steel composite armor with different rubber interlayer thicknesses at the impact angles of 30° and 60° were conducted by applying LS-DYNA dynamic analysis software.The jet velocity, target deformation and remaining penetration de...

An extension of the Wen-Jones model for the perforation of fully-clamped circular thin metal plates struck transversely by flat-faced projectiles at the center was made.Based on previous studies, an effective strain failure criterion was suggested to predict the perforation of the thin metal plates....

The techniques of magnetically driven quasi-isentropic compression and magnetically driven hyper-velocity flyer plates are new experimental method and tool, which are developed in the last decade and widely applied in the fields of shock dynamics and high energy density physics.The physical process ...

A calculation model of laser-driven multi-layer flyer velocity was established based on Gurney theory.By modifying laser energy absorption coefficient, the velocity of the multi-layer flyer driven by laser pulse beam was calculated.The effects of layer materials and layer configuration on the flyer ...

This review introduces the effects of high hydrostatic pressure on the molecular volume, non-covalent bond and conformation of protein.The molecular volume is decreased, and the hydrogen bond, electrovalent bond, and hydrophobic interaction are influenced by compression.The secondary, tertiary and q...

The influence of shock compression on the germination rate of plant seeds was investigated experimentally by a light gas gun and numerically by finite element method.The deformation of cover-plate and the shock wave propagation in groove were simulated by ANSYS AUTODYN.The germination rates of two k...