Advanced Materials Research Vol. 709

Abstract: In order to understand the mechanical properties of the soybean protein fibers (simply called SPF) in different processing condition, the tensile and frictional properties of the SPF are measured with different instruments. By the analysis of the results, the following conclusions can be deduced: bleaching has an influence on decreasing tenacity at break for each test modality. Knotted and looped modalities decrease fiber tenacity remarkably in all three samples, and the same occurs with elongation at break. Looped modalities show lower tenacity and elongation at break, the lowest being the bleached fibers in looped modalities.

Abstract: The soybean protein fiber is one of the green fibers. It is blended with Tencel. The strength of the blended yarn is tested. The relation between the strength and the twist factor and the blended ratio is analyzed. The optimum blended ratio and the critical twist factor is determined.

Abstract: The milk protein fiber is one of the green fibers. It is blended with cotton. The strength of the blended yarn is tested. The relation between the strength and the twist factor and the blended ratio is analyzed. The optimum blended ratio and the critical twist factor is determined.

Abstract: With the improvement of people’s living standard, the traditional warm clothing already cannot satisfy people’s diversified demands about clothes’ comfortableness, functionality and aesthetics. Hygroscopic exothermic fibers as a positive heat production type of warm fibers have attracted much attention. Softwarm heating warm fiber is a kind of new functional material and at the same time it is a representative of hygroscopic exothermic fiber. It can absorb the moisture by skin breathe and transfer it into heat energy through chemical reaction so as to achieve the purpose of warmth. In this paper, warmth property, tensile property, and drapability of softwarm fiber plain knitted fabric were tested, and comfort property, mechanical property and appearance performances of softwarm heating warm fiber fabric were investigated. Our study showed that the wearability of softwarm fiber fabric is fine, especially the warmth property which can meet our needs of warmth to knitted underwear.

Abstract: The basic properties of the 3 Newdal knitted fabrics are measured with different instruments. Testing standards are tensile, wear resistance, pilling property and bending properties. By the analysis of the results, the following conclusions can be deduced: Among the 3 fabrics, the mechanical properties of the blended knitted fabrics Newdal /Polyester is the best.

Abstract: Phenolic fiber is a new fiber and has excellent flame retardant properties. In order to investigate the textile possibility of phenolic fiber and to develop protective clothing and decorative fabrics containing phenolic fiber, the mechanical properties of phenolic fiber were studied firstly, then the polyester fiber was chosen to blend with different portion of phenolic fiber to enhance the strength of the blended yarn and finally the fabrics were knitted with different blended yarns. The strength and wear resistance of different blending ratio of phenolic/polyester blended yarn, and the bursting strength, abrasion resistance and flame retardant properties of the blended fabrics were analyzed and compared. The experimental results shows that the breaking tenacity and elongation at break are low, only 1.3 cN/dtex and 9.4%, respectively, which is not suitable for 100% phenolic fiber to be processed in yarn. The strength and wear resistance of the phenolic/polyester blend yarns and their knitted fabrics increase while the contents of polyester are increased. The flame retardant of phenolic/polyester blend fabrics is improved greatly due to phenolic fiber. Therefore, it is necessary for phenolic fiber to modify its strength and extension in order to be able to get the 100% phenolic yarn and products and in order to give full play to the excellent characteristics of the phenolic fiber.

Abstract: The production planning problem in defense industry has the non-regular nonlinearity of the objective function and the NP-hard nature of the solution space. A nonlinear integer programming model was proposed for this problem. A differential evolution based optimization algorithm was developed to solve the proposed model. A case study validated the effectiveness of the developed algorithm, and proved that it is superior to the standard genetic algorithm on the global searching capability. The algorithm can support the weapons production planning, and also can be applied to other industries.

Abstract: This paper takes N-S equation as the basic control equation, selects turbulence model, and adopts the sliding mesh technology to conduct numerical simulation for the interference of missile jet flow and inflow on the flow field in different flow conditions. The results indicate that: the lift coefficient, drag coefficient and pressure center coefficient of missile body change with the changes of flowMach number and attack angle. The lift coefficient increases with the increase of Mach number in subsonic speed, decreases with the increase of Mach number in supersonic speed, and reaches a maximum value with the increase of Mach number in transonic speed. The change rule of drag coefficient and pressure center coefficient is the same as that of lift coefficient. That is, they increase with the increase of Mach number in subsonic speed, and decrease with the increase of Mach number in supersonic speed.

Abstract: A kind of morphing aircraft based on the concept of telescopic wing was designed in this paper. With the numerical calculation, it compared the aerodynamic characteristics before and after the morphing of the aircraft, and analyzed the relationship of the aircraft aerodynamic coefficient to its length, angle of attack and flight Mach number. The result showed that through morphing the movable wing, the aircraft can significantly change the lift, drag and other aerodynamic characteristics; the morphing aircraft can satisfy the dual task requirements of low-speed cruise and high-speed attack. Compared with the traditional aircraft in fixed shape, it had a better aerodynamic performance.

Abstract: Mold flow software is used in the moldflow analysis of plastic parts, which can imitate the filling and cooling process of plastic parts in order to forecast the probable defect in product designing,so that the performance and quality of the plastic parts are confirmed.Different projects are compared to produce an optimal mould construction. Which saves the cost of production and improves the product quality and production efficiency.