In the last 10 years or so, nearly all major Chinese universities, schools and research institutes with strong Earth science programs showed strong interest in developing a new research branch of High-Pressure Earth Sciences.As a result, many young Chinese scientists with good training from the univ...

As an effective way to realize metal hydrogen and high-temperature superconductors, the metalization and superconductivity of hydrogen-rich compounds have become one of the hot spots of physics and materials science.In practical application, hydrogen-rich compounds are also potential hydrogen storag...

In this study we studied the chemical reaction of the NaCl-O₂ system under high pressure and high temperature using the diamond anvil cell apparatus and the double-sided laser heating technology.The sample was heated to about 1 500-2 000 K under a pressure of 55 GPa, and then analyzed by the Raman m...

In the present work we determined the sound velocities of shocked Fe_92.5O_2.2S_5.3 (in weight percent) under pressures up to 208 GPa using the reverse-impact method and the optical analyzer technique.We found that the longitudinal sound velocities of the solid Fe_92.5O_2.2S_5.3 began to decrease at 144 G...

Based on a two-stage light gas gun and a multi-channel time-resolved pyrometer, we simultaneously measured the shock temperatures and sound velocities of B2, B2-liquid and liquid phase NaCl single crystal in the pressure range from 45 GPa to 85 GPa.According to these sound velocities, the shock melt...

The Richtmyer-Meshkov instability of a "V" shaped air/SF₆ interface accelerated by a planar incident shock and its reshock was experimentally investigated in a shock tube.The soap film technique was adopted to form a well-controllable initial interface, and the flow field was captured by a high-spee...

Based on the stress-strain relationship in three-dimensional condition, we established a dynamic constitutive model of an anisotropic composite material using the Grüneisen, PUFF equations of state, Tsai-Hill yield criterion and the Johnson-Cook stress model and then simulated the thermal shock wave...

We used the polycrystalline cubic boron nitride (PCBN) as the anvil material based on its high hardness and strong absorption of neutrons, and designed a new type of concave-flat anvil and a hybrid gasket made of TiZr alloy, carbon fiber and teflon.The PCBN cell pressure was calibrated using the tra...

A quick and practical engineering analysis model based on the reasonably simplified hypothesis is an important means to study the ballistic performance of the ceramic/metal targets.The available detailed theoretical models have to carry out complex calculation and rarely are made comparisons with th...

In this research, we carried out a systematic study of the mechanical behaviors of the 93 tungsten alloy (93%W-4.9%Ni-2.1%Fe) with a temperature range of 296-1 273 K and a strain rate range of 0.000 5-6 000 s^-1.The results demonstrate that the flow stress is highly dependent on the temperature and t...

As an important part of high-speed trains, the axle has to withstand complex loads, especially the shock load in the train's operating conditions.To study the dynamic mechanical properties of the 42CrMo steel used in axle production, quasi-static and dynamic compression experiments of 42CrMo steel w...

In this research, we focused on the effect of the stiffener shape on the dynamic response of composite stiffened panels.We first established the finite element analysis model for composited stiffened structures with 3 kinds of stiffeners using the local refinement with the interface between the laye...

In this study, the single shock mode—shock wave propagates along the hollow cylindrical shell—was established and, by introducing the modified pipe wall parameters, the axial dynamic buckling response of the graded hollow cylindrical shell was predicted and compared with that of the hollow cylindric...

The wheel-rail interaction is a major concern in research for high-speed rail transport.As a main type of wheel/rail failure, the wheel flats exert serious restriction on the stability and safety of high-speed trains.In this study, a three-dimensional wheel-rail rolling contact model with a flat was...

Carbon fiber reinforced polymer (CFRP) laminates and epoxy gels have been extensively applied to externally strengthen engineering structures to resist blast loading.In order to understand the mechanical properties of CFRP/epoxy gel composites, we carried out a series of quasi-static tensile tests a...

To study the effect of the explosion caused vibration on the roof of the pasted backfill, which use a new cementitious material agent as the backfilled agent in substitution of cement in the downward slicing drift mining, we first conducted blasting test, theoretical analysis and test data regressio...

To investigate the feasibility of applying the light-initiated explosive, silver acetylide-silver nitrate (SASN), as an effective simulation of a cold X-ray blow-off event, we carried out experimental researches on the detonation property of SASN ignited by a light flash.First we presented the basic...

In this work we presented an improved form of the drop-weight system in which, instead of being impacted directly by the drop weight, the sample was impacted by the upper anvil which was beforehand impacted by the drop weight.Based on this improved drop-weight system, the ignition and burning proces...