Advanced Materials Research Vols. 912-914

Abstract: This paper presents the influence of the weld widthroot gapand weld offset of the T-joint to the overall stiffness of sandwich plate with finite element simulations. From the results of finite element calculation and some of experimental verification we can see:(1) For this structure, welding joint damage occurs before the face plate buckling.(2) Among the factors weld widthgap and weld offset of the T-joint, the weld width affect the overall stiffness the most. (3) When root gap and weld offset lower 0.1mm and 0.12 mm, respectively, they have a little influence on the resistance of deformation ability for the sandwich plate, they can be ignore.

Abstract: Based on the requirements of The Twelfth Five Years development planning of State Grid and the development of electrical fitting, State Grid will enlarge the change of rural power network and power distribution market, which will make the coverage of rural power network and power distribution to be larger so that reducing the loss of the power transmission line will become an important task research. To reduce or replace the high energy consumption steel fittings and the high price aluminum fittings, this article make feasibility analyses for a new material used in electrical fittings to protect the environment and economy energy source, by analyzing the performance and test property of the new material.

Abstract: 0Cr18Ni10Ti stainless steel was coated by hot-dipping in a molten aluminum bath, and then diffusing annealing at 950 °C for 2h. The high temperature isothermal oxidation behaviors of the hot-dipped aluminized steel and 0Cr18Ni10Ti steel were tested at 900 °C for 100h using resistance furnace. Morphology, and phase composition, element distribution of the oxide scale were characterized by XRD, SEM and EDS. The results of hot-dipping Al showed that slow weight gain was occurred, because of the formation of compact and dense Al₂O₃ oxide film during the oxidation process. The result of 0Cr18Ni10Ti showed that instable oxidation occurred, and a significant weight gain was obtained. The oxidation behavior of the steel is subject to breakaway oxide nodules on the surface. The oxide nodules are composed of two layers. Outer Fe-rich layer is susceptible to spallation and inner layer is loose.

Abstract: The main requirements of preparation of composite materials in aerospace industry are affordable , highly automated and good quality control.To reduce the mold cost and shorten the production cycle, the aviation industry is focusing on weaving technology,advanced spread with technology, autoclave technology, injection process, advanced curing process;,all quality concept and thermoplastic process. The main principle of RTM process is laying reinforced material form in the cavity, in accordance with the requirements of performance and structure, injection equipment will be used by special resin system of closed cavity, mold has fastening , injection mould with peripheral seal and exhaust system, which ensures that the resin flow smooth out all the gas in the cavity side by side and infiltrating fiber thoroughly, it also has heating system, which is used as heating composite components of.curing forming.

Abstract: A photonic crystal model with circular resonant cavity is reported in order to achieve high efficiency and multi-channel filtration. Design a multi-channel filter based on its transmission properties. The distributions of the light energy of different wavelengths are given. As a result, the photonic crystal with circular resonant cavity has output efficiency of 75.5%99% and 100% when the wavelength is 1447nm1535nm and 1628nm. As the dielectric constant increases, the output wavelengths change. So, we can use this method to adjust the output wavelengths. Meanwhile, when the centre wavelength is 1447nm and 1535nm the multi-channel filter can output in different directions.

Abstract: Metallic thermal protection system (MTPS) is a key component in space vehicle design. By introducing thermal contact resistance (TCR) on the interface between different layers of MTPS, an one dimensional (1D) thermal conduction model for MTPS with multiple functions is established for thermal design. An optimization method is proposed to determine the thermal parameter by comparing the results of 1D finite differential simulation with the test ones. The thermal mode is analyzed by three dimensional FEM analysis and the results show that the mechanical characteristics of MTPS appear to be asymmetric which provides a new consideration to insulate the fluctuating load.

Abstract: To strengthen the roof beams of a model duplex composite mold design process, for example, to explore the data in the IMAN UG design platform using three-dimensional solid steps, and introduces a three-dimensional solid design and development of applications for three-dimensional solid design in contemporary mold enterprise business without machining and assembly diagram programming situation.

Abstract: In this research, a study is made on the production and manufacturing process of the WPC unit member with 70% of wooden fiber contents, and described the productivity and durability of various modules based on factory-production-and-assembly-at-site system. Further, the study explained about the basic manufacturing process of eco-friendly highly filled extrusion-formed WPC, its unitification and material and mechanical characteristics.

Abstract: Acoustic emission (AE) was used to monitor the tensile test of composites with adhesive specimens. The mechanical response behavior, damage and failure characteristics, and the corresponding AE characteristics of the composites have been investigated. The results show that the load of the join with defect in the adhesive layer is lower than the join with no defect. The higher AE relative energy and the AE amplitude were obtained in the adhesive specimen with defect in the adhesive layer whereas the variation of the AE relative energy is different from the adhesive specimen with on defect. The characteristics such as AE amplitude distribution, relative energy and cumulative hits are connected with the tensile damage and failure of the adhesively bonded single-lap joints of composite laminate. In the actual AE monitoring, these feature parameters should be considered entirely assess the damage and failure of the composites structures.

Abstract: Effect of nucleation agentboth on the toughness and the orientation of PET were studied. Rapid nucleationof melted PET caused by nucleating agent resulted in the decrease in grain sizeand it can improved the toughness of the PET. Both the elongation and the areaunder stress-strain curves of the PET strapping band increased significantly.Among these agents, 0.5wt% Aclyn is the most effective for elongation increaseand the tensile strength is not changed for PET/Aclyn strapping bands. Both thedecrease in orientation degree and the increase in crystallinity were observedafter adding nucleating agents in PET strapping bands. The increase in theresidual ratio of the relaxation stress with the increase of the crystallinity proved that the crystallization could inhibits thedevelopment of the stress relaxation.