Advanced Materials Research Vols. 393-395

Abstract: In this paper, sandwich construction was made up of wood surface sheet and paper honeycomb core. Some cores were impregnated with phenolic resin. Compared to untreated honeycomb materials, impregnated honeycomb core greatly improved the mechanical properties of sandwich construction composites. The results of the study showed that, sandwich construction with phenolic resin treated honeycomb core had higher bonding strength than those bonded with isocianate resin. With the increasing of honeycomb core thickness, sandwich composite material decreased in flat pressure strength, side pressure strength, and flexural properties. The results we got in this research would provide a very good reference to the application of sandwich construction with honeycomb core.

Abstract: The basic assumption which using the wooden cases technology in the electronically controlled forestry walking robot was proposed, and the lightweight new material improved the rate of the walking robot. The mechanical model of shell of the walking robot was built, and the mechanical analysis was carried out on it. The equation of the shell which encountered with the external collision was listed and the internal forces and deformation of the shell vertex were obtained under the external collision. The intensity of the shell of mobile walking mechanical which is consist of the wood fiber composite was verified, which put forward innovative solutions for the design of the electronically controlled forestry walking robot.

Abstract: Stable leather superfine powder suspension was got by superfine powder of leather solid wastes, maleic anhydride(MAH) and acrylic acid(AA). The best MAH、AA modifying conditions with grafting ratio as index were discussed by orthogonal test according L9(34) factor levels, and the results show that modified productsⅠis got by the total amount of MAH account for 50% of the amount weight of leather superfine powder at 80°C for 3 hours in the solution of N,N-dimethyl formamide (DMF). The MAH modified products was filtered and washed with water to reserve, and then was further modified by AA and MA being designed orthogonal test according L9(34)factor levels for optimum conditions with grafting ratio as index. The best modification conditions were as follows: ammonium persulfate(APS) as the initiator, the mass of initiator accounted for 2% of total weight of monomers , the volume ratio of AA and MA was 5, and the reaction temperature was 90 °C for 3 hours in 12% aqueous solution. The monomer grafting percentage of the products was 37.8%. The product was characterized by infrared spectroscopy (IR) and Size analyzer.

Abstract: The morphology of the interface between a commercial epoxy prepreg resin (HexPly M18/1) and Polyetherimide (PEI) is studied. Different cure cycles prescribed by the supplier were investigated to determine the influence of temperature and pressure on interface formation. Atomic Force Microscopy (AFM) was used as the main means of investigation. A phase-separated interphase spanning 9-10μm was observed for the PEI/epoxy prepreg interface. It was found that the temperature profile of the cure cycle strongly influences the formation of this interphase. Rapid formation of these relatively large interphase areas suggests that mechanisms other than diffusion are responsible for this phenomenon.

Abstract: The locations and number of actuators in piezoelectric truss is very important. The best number and locations of actuators can make truss node displacement minimum. Based on the function of truss node displacement, this paper analysis the axial force of every bar of intelligent truss, and deduced the piezoelectric truss node displacement, and optimized the location and number of truss using genetic algorithm (GA). The results of the example show that the proposed method is effective.

Abstract: By finite element method (FEM), the near field optical properties of an individual Ag nanowire dimer encapsulated with nanometric dielectric layers were investigated. We demonstrated that the electromagnetic enhancement could be optimized by improving the substrates’ refractive index and the thickness, and gave the peak wavelength as a function of the two parameters separately. The results are important for further understanding surface-enhanced Raman Scattering (SERS) and have referential meaning for choosing the appropriate substrates in the application.

Abstract: Chinese traditional dwelling has its abundant connotation. In terms of architecture, it plays an important role as a reference to the Construction of New Rural Dwelling. However, with the farmer’s blind pursue of city life and the production of the Standard construction products, the traditional dwelling’s culture is gradually abandoned, which causes the debility of the regional features. The government should pay high attention to the problem of how to inherit the traditional culture in the Construction of New Rural Dwelling. They should also strengthen the guidance to the farmer’s new concept and combine the modern functions of dwelling with traditional style properly, plan and construct the New Rural Dwelling according to its local conditions.

Abstract: On the basis of the theory of FRP sheet steel reinforcing concrete beams (SRC-beams), in order to better explore the force performance of FRP (Fiber Reinforce Plastic) steel reinforcing concrete beams, this paper analyzes the stress process simulation of the beam using the computer program of nonlinear analysis. In order to validate the program of the beam section the reliability of the simulation analysis, this paper brings beam section size and its material performance parameters into program and gets different parameters on the bearing capacity of beams influence law. Research shows that when working in the stage of FRP elasticity the reinforcement of FRP layers has little influence on bend curvature figure. In the elastic-plastic stage it has larger influence and the cure increases with the increase of FRP reinforcement layer. It shows that with the increase of the section stiffness beam bending flexural capacity is also bigger.

Abstract: Today the blind source separation (BSS) algorithms are widely used to separate independent components in a data set based on its statistical properties. Especially in image data applications, the independent component analysis (ICA) based BSS procedure for image pre-processing has been successfully applied for independent component extraction in order to remove the noise signals mixed into the image data. The contribution of this paper refers to the development of a nonlinear BSS method using the radial basis function (RBF) neural network based ICA algorithm, which was built by adopted some modifications in the linear ICA model. Moreover, genetic algorithm (GA) was used to optimize the RBF neural network to obtain satisfactory nonlinear solve of the nonlinear mixing matrix. In the experiments of this work, the GA optimized nonlinear ICA method and other ICA models were applied for image de-noising. A comparative analysis has showed satisfactory and effective image de-noising results obtained by the presented method.

Abstract: As a new bracing structure, the framed anti-sliding piless based on spatial framework structure, which have the advantages of less displacement in the top of the piles and large anti-force, are developed as a new retaining structure, and can be used to reduce the piles deformation. However, the previous calculation models of double-row piles ignored the deformation coordination action between linking beams and ring beams, the interaction between piles and beams. Further more the calculation results based on the models are not accurate enough. In this paper, a spatial force model of the framed anti-sliding piles is presented. Taking framed anti-sliding piles as a single-layer multi-span frame affected by piles, beams and soils, the spatial synergic interaction between top ring beam and linking beam, as well as the affection of soil-arch on the frame are analyzed. The horizontal displacement in front of the framed anti-sliding piles and distribution of axial force and moment of piles are studied by Finite element method. The results reflect commendably the stress and distortion character of the framed anti-sliding piles. Finally, some rules about the pile-beam-soil interaction in the pile structure are summarized.