High-pressure regulation has played an important role in enhancing the superconducting transition temperature (T_c) and revealing the competing electronic orders and superconducting mechanisms of iron-based superconductors. A large number of high-pressure studies have shown that different pressure co...

The fundamental properties of condensed matter strongly depend on its microscopic configuration and electronic structure. High pressure can effectively reduce the distance between atoms, result in the rearrangement of electronic configuration and change the bonding mode, so that enabling the matter ...

Thermoelectric material is a kind of functional material which could realize the conversion between thermal energy and electric energy. Silicon-germanium (SiGe) alloy is used in deep space exploration as a kind of high temperature thermoelectric material. In this work, P-doped n-type SiGe alloy was ...

In order to investigate the compressibility of cerium-lanthanum (CeLa) alloys in the γ phase and the effects of the strain rate on the phase transformation behaviors, two loading techniques, including both the powder-gun-driven planar impact and the magnetically driven ramp compression, are adopted ...

In this study, the effect of ignition pattern on the wavelet features of rotating detonation waves (RDWs) is numerically investigated with Euler equations and two-step induction-reaction model. The influences of the size, the number and the spacing of the ignition zone were considered. The theoretic...

In order to study the propagation law of blasting seismic waves in general strata induced by underground engineering constructions, shear horizontal (SH) waves were selected as the research object and the stiffness matrix and dynamic balance equation of general layered strata were established based ...

This paper aims to experimentally and numerically investigate the effect of perturbation on the detonation initiation. In a round tube with 90 mm inner diameter, a stable detonation is firstly failed by an orifice plate with the blockage ratio of 0.923, and then the small-scale perturbation created ...

Cylindrical quasi-isentropic compression driven by explosive magnetic flux compression generator (MFCG) enables ultra-high pressure loading of low-density materials. To obtain the optical properties of the compressed sample, a new vacuum light-guide probe structure using metal vacuum tube as the opt...

In order to study the mechanism for disk containment of high-energy rotor, with test rotor manufactured with precast cracks, containment tests are carried out using a high-speed spin tester, and the nonlinear explicit dynamics commercial software is used to simulate the containment process of the hi...

To reveal the fracture evolution mechanism and crack propagation law of water-bearing granite, uniaxial compression, Brazilian splitting and direct shear tests of granite with different water-bearing states were carried out. The mechanical and acoustic information of rock during deformation and fail...

The liquid silicon cement sheath samples were prepared, and the mechanical property testing experiments were carried out. Aiming at the problem of downhole failure of porous cement sheath, the porous “single-layer cement sheath” and “cement sheath-casing-cement sheath” models were established by usi...

In this paper, the deformation behavior and energy absorption performance of the hierarchical structure were investigated based on the face-centered cubic hierarchical structure to change the amplitude and distance of the hierarchical structure’s straight beams and introduce the honeycomb structure ...

Sinusoidal corrugated thin-walled tubes are introduced as a core layer into polygonal thin-walled tubes, and quadrilateral, pentagonal and hexagonal sandwich tubes with corrugated cores are then obtained. First of all, their mechanical responses including energy absorption performance under quasi-st...

In blasting excavation of deep rock mass engineering, the blasting effect is closely related to ground stress. Based on the rock mass-air fluid-solid coupling model, the blasting damage effect of rock mass under different in-situ stress and lateral pressure coefficient, and the variation rule of ene...

In polycrystalline materials, the grain boundaries between grains with different orientations have a great influence on the dynamic response of material under shock loading. On the basis of the single crystal plasticity model, a polycrystal plasticity model containing grain boundary obstacle, geomet...

In order to explore the influence of projectile geometry on the dynamic mechanical response of graphene, two projectile designs with different shapes and different structural size ratios under the same shape have been considered using molecular dynamics simulation. The mechanical response of single/...

To realize the effect of the near-field shock wave enhancement of low collateral damage ammunition, this study proposes to add reactive material into the embedding layer of heavy metal particle in the sub-package low collateral damage ammunition to enhance the near-field overpressure and specific im...

In order to reveal the inhibition effect of solid explosion suppressors on acetylene-air premixed gas explosion, a 20 L spherical explosion test system was used to study the impact of typical solid explosion suppressors of SiO₂, Al(OH)₃ and NaHCO₃ on the explosion characteristics of premixed acetyle...

Basis on a self-built gas explosion platform, the influence of hydrogen on methane-air explosion pressure is studied when the hydrogen doping ratio is 0%, 5%, and 10%, and the explosion suppression performance of single spherical and combined spherical porous non-metallic materials for methane-hydro...

To ensure the construction stability of rectangular pipe jacking shield tunnel, taking the underground passage project on the east side of a railway station as the case study, the refined model of rectangular pipe jacking shield tunnel under high-speed railway in composite stratum was established us...