Advanced Materials Research Vols. 779-780

Abstract: Using veneer and Straw shavings two kinds of raw materials to manufacture composite way veneer straw composite panels, Straw is discussed when the shop is the amount of glue, Adhesive proportion factor effect the performance of the veneer, and this kind of plank makes a simple analysis of economic benefit.The results show that: SEM test proves that the API surface diffusion performance is better than that of UF adhesive. Urea-formaldehyde resin adhesive on the surface of straw respectively formed by the uneven and thick, API adhesive fillet formation is relatively uniform and relatively thin.In the production of veneer straw composite board is best craft hot-pressing temperature is 160°C, hot pressing time is 1 min /㎜, sizing amount of straw content is 12%, API adhesive formulations: Ratio of main agent PVA: SBR for 7:3, Crosslinking agent amount (P - MDI) 30% , density of not less than0.85g/cm³. The board each performance index of the optimal, fully able to meet the requirements of national standard, adopt the process sheet belongs to no aldehyde board.

Abstract: Using veneer and Straw shavings two kinds of raw materials to manufacture composite way veneer straw composite panels, Discussion the straw coverings density, hot-pressing process and other factors on the performance of the board, and a simple analysis of the economic benefits of such a plate. The results show that: The production veneer straw composite panels optimum process is pressing temperature 160°C, hot pressing time 1min/ mm, straw sizing quantity is 12%, API adhesive formulations：API adhesive formulations: Ratio of main agent PVA: SBR for 7:3, Crosslinking agent amount (P - MDI) 30% , density of not less than0.85g/cm³. The board each performance index of the optimal, fully able to meet the requirements of national standard, adopt the process sheet belongs to no aldehyde board.

Abstract: In recent years, Reactive Powder Concrete (RPC) has been concerned by the structural engineers and researchers. RPC is a kind of cement-based composite which has ultra-high strength, high ductility and durability, however, it has great fragility. The fragility performance of RPC will be improved if RPC and steel are put together as RPC-filled steel tube circular stub columns. The aim of this paper is to develop accurate finite element models to simulate the behavior of RPC-filled steel tube circular long columns. The finite element program ABAQUS is used in the analysis. An extensive parametric study is conducted to investigate the effects of different slenderness ratio and confinement action on the strength and behavior of RPC-filled steel tube circular long columns. The results obtained from the models are verified against the results of the tests. The results show that the rising part of load-strain curves are in good agreements with experiment results.

Abstract: The asphaltic cement and mastic asphalt are respectively carried on Brookfield rotary viscometer and Lueer tester. The results show that: the thixotropic properties of mastic asphalt lags behind the asphaltic cement; as the stirring temperature is high, the thixotropic effect of mastic asphalt is not obvious, but the construction time range is large. With high stirring speed, the thixotropic effect of mastic asphalt is obvious, but the construction time range is small. The thixotropic effects of mastic asphalt are also analyzed to provide reference for the improvement of the construction process and quality of the construction.

Abstract: The main purpose of this paper was to analyze how the doping content of Ga₂O₃ effect the Gallium doped zinc oxide (GZO) targets. GZO targets were prepared by air sintering. The density, sheet resistance, bending strength and Vickers hardness were measured. The morphologies and microstructures were characterized by XRD and SEM. The results showed that GZO target with Ga₂O₃ content of 1wt% showed the best properties which corresponded to the highest relative density and bending strength of 99.2 % and 91.79MPa respectively, and the lowest sheet resistance of 7.36Ω/. While the Ga₂O₃ content was higher (2 wt% or 3 wt %), the second phase came out.

Abstract: Physical characteristics (including unit weight, dry unit weight and submarine rest angle) and motion characteristics (including settlement characteristics, incipient velocity and resistance characteristics) of bamboo powder model sediment were studied by test in this paper. Experimental study on physical characteristics showed that particle size variation had little effect on unit weight, dry unit weight increased with the particle size,submarine rest angle increased with the decrease in particle size and an empirical formula for calculating submarine rest angle of bamboo powder model sediment was proposed. Experimental study on motion characteristics found that the single particle settling velocity of bamboo powder model sediment increased with particle size, the relative settling velocity initially increased and then decreased with sediment concentration, the incipient velocity increased with the particle size and water depth, the roughness decreased with water depth and increased with the flow velocity and an empirical formula for calculating the incipient velocity of bamboo powder model sediment is proposed.

Abstract: Based on the multi-field coupling effect and the theory of electrodynamics, as well as the capture effect of the ER fluids flowing through the control field, by analyzing on the flow characteristics under the electric - power - thermal coupling load environment, the structure-force dynamic coupling mathematical model of ER fluids is derived under multi-field.

Abstract: Air spring gas is generally regarded as an ideal gas in analysis , but this is not consistent with the actual work . Considerring influence of non-ideal gas to air spring stiffness ,and based on van der Waals equation which is closed to the real gas equation, stiffness characteristics model of air spring and air spring with auxiliary chamber are re-derived and established. Influence of non ideal gas correction factor H to air spring stiffness is analysed within the range of pressure 0.2MPa to 5 MPa and working temperature -50 °C to 50°C,and results show that , there are big errors in air spring stiffness model in the conditon of low temperature and high pressure based on ideal gas equation, and range of application of the stiffness model is expanded when H is introduced and amended.

Abstract: Tool condition monitoring, mainly tool breakage detection for high-speed machining (HSM), is an important problem to solve; however, the techniques or types of sensors applied in other research projects present certain inconveniences. In order to improve tool breakage monitoring systems, a simple, effective, and fast method is presented herein. This method is based on the discrete wavelet transform (DWT) and statistical methodologies. The effectiveness of the method is based on the measurements of the feed-motor current signals using inexpensive sensors. It is well-known that during the cutting process, the motor current is related to the tool condition.

Abstract: Bismuth tungstate (Bi₂WO₆₎ microcrystalline with different surfactant were successfully prepared by a facile hydrothermal route.The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and BrunauerEmmettTeller surface area (BTE) in detail. The photocatalytic activity of the samples was also evaluated using the degradation of Rh B at room temperature under visible light irradiation. It was found that the surfactant played important roles in the formation process of controlling the morphology and structure of the catalyst and also had a great influence on the catalytic activity. SDS and CTAB effectively improved the catalytic activity and PVP was good at controlling morphologies.