Materials Literature
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Although manufactured nanomaterials have a great many of fantastic functions，the adverse impacts about them have been observed. As a kind of nanomaterial, biomedical films obtained from electrospinning are valued greatly, and the sizes of the diameters in electrospun films plays a fundamental role in enhancing the saf…
The 800kv dc transmission line is now in experimental operation in china. Recently, polymer nanocomposites have attracted wide interest as a method of enhancing polymer properties, which may apply as insulators in the UHV and EHV transmission line. A number of papers have reported enhanced electrical performance (agin…
Wood-plastic composites (WPC) , which were made of virgin high-density polyethylene (HDPE) with poplar fibers as filler, were measured by three vibration nondestructive testing (NDT) methods. The values of dynamic Young’s modulus of specimens were measured by different vibration NDT methods, and the values of static b…
Abstract Review: 36 refs.
During weaving, broken picks and irregular pick always lead to loom stop and cloth defect. Weft tension is one of the important factors. This paper introduces a kind of method that can be used to measure weft tension when the weft is in the shed on the loom. The weft tension in shed of 296.5 dtex + 70 D spandex coveri…
In this Study, Visible on the Far-infrared Emissivity of Knitted Fabric, its Rate of Change of Far Infrared Radiation Were Observed. in this Study, Light Exposure Time for 20,40,60 Minutes, the Experimental Results, the Longer the Kind of Light Source Distribution Is much Higher Surface Temperature Will Be Relatively…
The objective of this work was to use a novel 3-D test analysis system for evaluating the mechanical properties of the natural fiber fabric composites under biaxial loads. Composites with three resin matrices (water-based epoxy resin, isocyanate resin, phenolic resin) were investigated, and strain filed were character…
Absorption spectra for pristine silicon and oxygen capped silicon nanocrystals (ncs) are computed using time dependent local density approximation (TDLDA) in the size regime of 1.0 to 1.5 nm. These clusters show very small highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) gaps. This…
We consider the problem of the H-polarized plane wave scattering by a discrete comer made of circular wires, using the field expansions in local coordinates and addition theorems for cylindrical functions. The scattering cross-sections and near-field patterns are found numerically and plasmon and grating-type resonanc…
In this paper, the air jet flow field model for the dual slot die is established. The flow field from the blunt die was found to exhibit that as the jet angle becomes sharper, width of the die slot and distance between the inside edges of both jets more narrow, the mean velocity under the die increases.
The phenomenon of negative refraction of light in 1D photonic crystals with metal layers is studied. It is demonstrated that this phenomenon is due to the excitation of plasmons, which transfer energy in different directions the metal and inside the dielectric layers. The ratio between these two fluxes determines the…
Recently, several vector hysteresis models such as vector Preisach, vector Jiles-Atherton and dynamic E&S model have been proposed to describe vector magnetic properties of electrical steel sheets. However, it is still difficult to find an adequate vector hysteresis model in finite element application for both the Non…
Reducing yarn hairiness is the greatest ascendancy for compact spinning. Based on the test of fiber length distribution, the hairiness of compact yarn is simulated in order to study the rule of hairiness producing. The hairiness of different fineness yarn is simulated by changing the twist factory and the diameter of…
Fe nano-films deposited on pure Si wafer by metal vapor vacuum arc (MEVVA) ion deposition system were annealed in hydrogen and then treated by ammonia at 750 °C for the catalyzed growth of aligned carbon nanotube (CNT) arrays. Influence of ammonia on the microstructures of Fe nano-films was analyzed by a field emissio…
The purpose of this paper is to research on shock wave propagation law of internal gas explosion. The multi-material Eulerian and Lagrangian coupling algorithm was adopt. Using ANSYS/LS-DYNA dynamic analysis software to build frame structure, air and gas explosion models. Multiple ALE elements for simulating air and g…
Thin-walled cylinder, circumferential crack, pure bending, J-integral, stress intensity factor
Surface oxygen diffusion hardening treatments of TC4 titanium alloy in Ar+O2, O2 and ambient atmosphere were performed by scanning with a pulsed Nd: YAG laser. By using different gas atmosphere with Ar+O2, O2 and ambient atmosphere, the structure and the hardness behavior of the laser oxygen hardening layers can be co…
An unsteady-state heat transfer numerical model of the microclimate between human skin and clothing is set up. Air-gap thickness less than 17mm is considered. Matlab pde toolbox is chosen to compute the numerical model. The numerical results of the model agrees well with a set of published experimental data.
The formation of the long-period stacking ordered structure (LPSO) in a Mg88Y8Zn4(at%) ribbon produced by melt spinning was studied using high energy X-ray synchrotron radiation diffraction during in-situ isochronal heating and transmission electron microscopy. The microstructure of the rapidly solidified ribbons is c…
1,4-butylene bi-p-hydroxybenzoate (BBHB) was synthesized using methyl p-hydroxyl- benzoate and 1,4-butanediol under catalyst and stabilizer conditions; Then, the thermotropic main- chain liquid crystalline polysiloxanes (MCLCPs) with flexible spacer, were synthesized using BBHB and dimethyldiethoxysilane reagents by m…