Advanced Materials Research Vols. 774-776

Abstract: In this paper, ANSYS/LSDYNA software is used to simulate the process of armor-piercing projectile vertical penetrate metal matrix functionally graded material (FGM) armor reinforced by ceramic particles with the distribution of two power-law function along the thickness direction. The ceramic particle volume fraction varies from layer to layer along the armor thickness while ceramic particles total volume fraction remains unchanged. Four different ceramic particles distribution armors with the same total volume fraction are simulated. And the effects of the two power-law function types on the penetration of functionally graded material armor are investigated. The results show that the ballistic resistance of ceramic particle reinforced functionally graded armors is better than homogeneous ceramic particle reinforced armor with the same total volume fraction. Meanwhile, the larger the ceramic particles volume fraction on target surface is, the better ballistic resistance of functionally graded armors will be.

Abstract: For conductors commonly used in the high and ultra-high voltage transmission projects, research was conducted on how ice shape, ice thickness, wind speed and angle of attack affect the static aerodynamic characteristics of ice-coated conductor. The ice shape and the shape of ice-coated conductor are both important factors that determine the aerodynamic characteristics of conductor. Sudden increase of lift coefficient may happen at low angle of attack. Wind speed shows less effect on aerodynamic characteristics of ice-coated conductor with streamlined shape than that of conductor with blunt shape. Under most attack angles, aerodynamic coefficients increase as the ice thickness increases. The aerodynamic load on ice-coated conductor does not increase linearly with the diameter of conductor.

Abstract: In order to prepare urea-formaldehyde (UF) resin adhesive with good performance for glass wool products, we used polyvinyl alcohol (PVA), p-toluenesulfonamide (PTSA) and methanol to modify UF resin, optimized the molar ratio of formaldehyde (F) / urea (U) and reaction components ratio by orthogonal test, reduced the content of free formaldehyde in UF resin, and enhanced the water resistance, flexibility and stability of UF resin.

Abstract: The effect of nanometer polysilicon material (NMPM) on properties of wax-diesel oil systems was experimentally studied. The particle size distribution of NMPM-diesel oil, wax-diesel oil system and wax-NMPM-diesel oil system were measured by laser scattering method. The viscosity of wax-diesel oil system was compared with that of systems with NMPM addition. A new wax growth and dispersion model was built up to analyze the mechanism for wax solubility increasing and size changing. Experiments show that the solubility of wax increases with the increase of temperature and the NMPM concentration in the wax-diesel oil system. The average particle diameter of NMPM-wax-diesel oil system is larger than that of wax-diesel oil system. The viscosity of wax-diesel oil system decreases with the NMPM addition.

Abstract: This paper describes the result of an experimental investigation on the impact damage on woven natural silk/epoxy composite face-sheet and PVC foam core sandwich panel. The test panels were prepared by hand-lay-up method. The low-velocity impact response of the composites sandwich panels is studied at three energy levels of 32, 48, and 64 joule respectively. The focus is to investigate damage initiation, damage propagation, and mechanisms of failure. It was observed that absorption energy capability decreased as impact energy increased. There was deflection on each impact load configuration at some point but their margin was insignificant. Physical examination of the specimen show that damage areas increased with increase in impact load. The novelty of this research is the use of woven natural silk fabric as a reinforcement fibre.

Abstract: Quantitative evaluation of carton black’s dispersion is useful for researching the influence of every kind of mixing procedure on carton black’s dispersion and the relationship between carton black’s dispersion and rubber’s property. Though analyzing standard images, the rule was found that the total number of carton black in rubber image changed smaller with the improvement of dispersion level. Combined with divided feature regions, the evaluation model of carton black’s dispersion was built on the basis of the total number of carton black in rubber image. The result of the evaluation describes the tendency of carton black’s size in the process of mixing and shows the distribution of carton black’s size.

Abstract: Given the influence of carton black's morphology on rubber's property, A new method was supplied that the parameters, such as length diameter ratio, morphology complexity, were used to characterize carton black's morphology. Convex hull of carton black’s region was used to calculate morphology complexity. Minimum bounding rectangle of carton black’s region based on convex hull was used to calculate length diameter ratio. The quantitative evaluation of carton black’s morphology is meaningful for researching the relationship between carton black’s morphology and rubber’s property.

Abstract: The manufacture technology of spherical WC powder has been studied by using of induction plasma. We can get spherical powder above 85% in the powder through changing several parameters. And the hall flow-ability, the oxygen content , particle size of powder before and after plasma treatment have been compared. The results were shown that oxygen contents was deduced markedly, and the plasma method can control the particle size easily.

Abstract: The analysis of material particles in the transmission electron microscopy (TEM) image is the most important in the development and synthesis of the new materials for application in many fields. Manual identification is the hard work, spent a lot of time and inaccurate method. To solve this problem, the image processing is proposed for automatically identifies the material particles boundary and size in TEM images in or order to extract the useful data. The image processing method has been experimented on variety of TEM images and very promising results have been achieved given more accuracy. Experimental results show that the proposed method gave the high adaptability, more accurate and rapidly than the manual method.

Abstract: The paper studies the application of different material sense qualities in book binding design through case study. It further proposes that binding material functions as a powerful language in book binding design, and the variety of binding materials produces a richer variety of book binding design such as diversified forms, contents and binding technologies, thus putting higher standards on modern book binding design.