Previous studies have found that the nano-polycrystalline diamond (NPD) is harder than single crystal diamond, consequently NPD prepared from graphite has been widely studied. Previous experiments revealed that the NPD originated from graphite contains both homogeneous fine structure and lamellar st...

The effects of pressure on the crystal structure, elasticity, electronic and thermodynamic properties of the new MAX phases Zr₂SeC and Hf₂SeC were investigated by employing the first principle of density generalized function theory. Elastic constants and phonon calculations show that both compounds ...

It is very important that new preparation method of nano-lanthanum oxide is explored in view of the current problems of low purity, poor sinterability, and large molecular gaps. Detonation method was employed to prepare rare earth nano-La₂O₃ powder in this study. La(NO₃)₃·6H₂O was added to the emuls...

To explore the flexible measurement technology under low-intensity shock wave, the shock tube calibration experiment was carried out for the polyvinylidene difluoride (PVDF) sensor based on the flexible substrate with an aperture of 8 mm. According to the experimental results, different bonding mode...

In order to investigate the tensile mechanical behavior and failure mechanism of polycarbonate (PC) composite reinforced by short glass fibers in different orientations at a wide range of strain rates, the tensile experiments of PC composites with 20% glass fiber content and fiber orientations of 0°...

In natural evolution, numerous biomaterials exhibit astonishing mechanical properties due to the exquisite coordination of their internal structures at all levels. Carbon fiber, as an excellent artificial material, provides an important raw material support for the design of biomimetic materials. Th...

Lightweight cellular I-beams have excellent energy absorption characteristics under external loads. This paper proposes to use cell web instead of solid web to design the I-beam structure of cell web. Based on the combination of square cell, honeycomb cell, concave cell and round cell, and square, h...

Combining hierarchy with nested, two kinds of circular nested hierarchical multi-cell tubes with different nested methods were designed innovatively. The energy absorption characteristics under axial impact were studied by numerical simulation. The results show that the high-level multi-cell tubes h...

Al₃Ti is characterized by low density and high hardness, however, due to its brittleness, it is prone to fracture under smaller deformation. To improve the application range of Al₃Ti, inspired by biological structures, a biomimetic finite element model was established based on the geometry of shell ...

​The dynamic response of aluminum foam-filled sandwich tubes subjected to lateral blast loading was investigated numerically using the dynamic explicit finite element method. Based on numerical simulation, the structural blast resistance was optimized with the core energy absorption and outer tube s...

Considering the real irregular geometrical characteristics of ballast and strain rate effect and failure behavior of material, finite element models of ballast impact on equipment cabin bottom plate of high-speed trains was established, and the deflection history response of transverse and longitudi...

In order to investigate the mesoscale development in the dynamic fracture damage of heterogeneous rocks at the mineral crystal scale, a heterogeneous rock model that can reflect the microstructure characteristics was constructed based on the particle flow code-grain based model (PFC-GBM) method. By ...

It is very important for semiconductor manufacturing and small particle protection to study the dynamic impact response of nano-scale multi-layer composite structures. Molecular dynamics simulation was used to investigate the impact resistance of Ag-PMMA composite films supported with Si substrates ...

Experiments, theoretical analysis, and numerical simulations were conducted to investigate the energy absorption characteristics of sunflower-like sandwich cylindrical shells under quasi-static axial loading. Firstly, quasi-static axial compression experiments and numerical simulations were conducte...

Concrete is a heterogeneous composite material composed of coarse aggregate, mortar and interfacial transition zone (ITZ). ITZ is the weakest phase inside the concrete and has a significant effect on the macroscopic fracture process of concrete. To respectively explore the effects of the distributio...

The paper takes the gas-liquid conveying pipe section in a 20 L spherical explosive device as the research object. The flow pattern structure and cross-section air voids characteristics of gas-liquid two-phase flow in the gas-liquid conveying pipe were studied by numerical simulation. The curvature ...