Advanced Materials Research Vols. 189-193

Abstract: By means of Adaptive Neural-Fuzzy Inference Systems(ANFIS), the prediction model of surface roughness of zirconia toughened alumina ceramics (ZTA ceramics) under ultrasonic assisted grinding is established, and the model may obtain the higher forecast precision (81.25%) by dealing with nonlinear problem among grinding parameters, and fuzzy rule curved face formed by prediction model showed four input factors have different influence on surface roughness Ra, and they are abrasive grain size, grinding method, grinding depth, axial feed and speed of worktable from top to bottom. So the prediction model provides a new and efficient method for intelligent information processing, and it could be applied in modeling and real-time control etc, and it is possible to be widely applied in engineering.

Abstract: Under dry cutting conditions, multi-factor orthogonal experiment test method is adopted to carry out experiment of milling gray cast iron HT200 using PCBN indexable face milling tool. Milling force empirical formula model is established by means of least-square method and regression analysis. Significance test of regression equation and regression coefficient prove that the reliability of the established model is high. Test results show among three milling forces, the biggest one is tangential force Fz, the smallest one is radial force Fy, whereas value of axial force Fx is between Fz and Fy. Through analyzing experiment results, relationship of milling parameters influence on milling force is summarized. Recommendation of milling parameter value range is put forward.template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.

Abstract: lightweight composite paper honeycomb core wallboard as green building materials and low carbon product of modern life, its lightweight and energy saving, environmental protection, easy construction which other wallboards can't reach, but in actual use, the residents reflects its sound insulation performance is not very well, The lightweight composite paper honeycomb core wallboardand is composite with two rigid panel and paper honeycomb core which is in the middle of the wallboard. However, at present, people rarely Study on Sound Insulation Property of lightweight composite paper honeycomb core wallboard, so take the lightweight composite paper honeycomb core wallboard as the research object, through several sets of Different Specifications wallboard of experiment test,, the results showed that:The sound isolation property of calcium silicate panel is better than Gesso panel’s. The thick panel’s sound isolation property is better than the thin one. At the same thickness, the more layers of paper honeycomb core, the better sound isolation effect. Increase the layer number of paper honeycomb core has remarkable effect on sound isolation property.

Abstract: Aligned carbon nanotubes(CNTs)/epoxy resin(EP) composites were prepared under a low magnetic field (B<500mT) induction. The effect of different magnetic fields on the electrical and dielectrical properties of composites was investigated. The results show that the CNTs are aligned with rod-like aggregations instead of single CNTs when the magnetic field direction is vertical to the casting direction of samples, then electric conductivity, permittivity, dielectric loss of the composite are improved. And a larger magnetic field intensity and a bigger mould capacity can help the effect of magnetic field induction. However the CNTs are seriously aggregated and the electrical properties of composites change worse when the magnetic field direction is parallel to the casting direction of samples.

Abstract: A short electroless Ni-P plating process for preparing EMI shielding wood-based composite was studied. Birch and Fraxnus madshurica veneers were used as the substrate. It is a simple method that Ni-P coating was easily deposited on the surface of two kinds of veneers. The plated specimens were observed by SEM that the films are uniform, compact and continuous. EDS results shows that the coating contains 4wt% phosphorus and 96wt% nickel. It is indicated by XRD analysis that the film on the two kinds of veneers are crystalline. It was measured that the two wood-based composites have better electromagnetic shielding performance if more than 60dB in the frequency ranges from 9k to 1.5GHz.

Abstract: Several algorithms were proposed relating to the development of a framework of the perturbation-based stochastic finite element method (PSFEM) for nonlinear dynamic problem with random parameters, for this purpose, based on the stochastic virtual work principle , some algorithms and a framework related to SFEM have been studied. An interpolation method was used to discretize the random fields, which is based on representing the random field in terms of an interpolation rule involving a set of deterministic shape functions. Direct integration Wilson- Method in conjunction with Newton-Raphson scheme was adopted to solve finite element equations. Numerical examples were compared with Monte-Carlo simulation method to show that the approaches proposed herein are accurate and effective for the nonlinear dynamic analysis of structures with random parameters

Abstract: In order to simulate the fault of a single rolling bearing, this paper used the fault diagnosis lab desk to simulate some representative conditions of 30205 type of rolling element bearing, including regular condition, inner ring fault, outer ring fault and rolling body fault. It also adopted fuzzy theory to analyze signals and diagnose faults on the base of the MATLAB software desk. This paper also adopts the amplitude spectrum, the power spectrum, the envelope demodulated spectrum and the delayed correlation-envelop spectrum to diagnosis and analyze simulating signals. Comparatively, the fuzzy diagnosis theory is dependable．

Abstract: This research presented the preparation of multilayer films on poly(ethylene terephalate) (PET) Substrate by electrostatic self-assembly technology. The silver nanoparticles were characterized by UV–vis spectrometry and scanning electron microscopy (SEM). The sequential dipping of hydrolyzed PET substrate in dilute solutions of poly(diallyldimethyl ammonium chloride)(PDDA) and silver nanoparticles to fabricate multilayer films. The multilayer films were monitored by UV–vis spectrometry, the surface plasmon resonance (SPR) obtained at 420 nm confirmed the existence of nanosilver on the PET film. The silver nanoparticles were also verified by the Inductively Coupled Plasma Spectrometry (ICP) and thermogravimetric analysis of the multilayer film. The transmission spectra indicated that the PET films contained silver nanoparticles have better UV protection property.

Abstract: A high stable wire transport system of wire-cut electrical discharge machine (WEDM) that can exercise the micro-wire machining is developed in this paper. In the wire transport system, two novel designs are proposed to improve wire tension variation during machining. 1. Active wire feeding unit: a device is used to isolate the inertia of the wire reel from the wire transport system. Hence the inertial loading of the wire can be reduced and the stability is also increased. 2. Multilayer sandwich vibration absorber: the axis of the reel is connected to a damped sandwich beam. When the perturbation occurs, the flexible motion of the beam can absorb the fluctuation of the wire. Then the wire tension can be more stable and better working precision is also achieved. Finally, two mechanisms were implemented on a micro wire-EDM machine to suppress the fluctuation of wire tension. Experimental results show that the variation of wire tension can be significantly reduced from 12.4 gf to 5.5 gf.

Abstract: The temperature field of blast furnace tap hole clay was analyzed by using ABAQUS software. Samples taken from the tap-hole clay in depth of 1200mm, 2200mm, 2600mm and 2800mm after roasted for 100 minutes were studied by using XRD and SEM to investigate their roast mechanism and microstructure at different temperatures. The results show that the ore phase of the tap-hole clay in depth of 1200mm remained unchanged but only tar and asphalt appear the carbonation phenomena. There is a large number of SiC crystalline phase appears in depth of 2200mm. At the same time, porosity increases and coke structure is formed. The air permeability is enhanced. In the tap-hole clay of 2600mm～2800mm depth, elongated rod-likeβ-Si3N4 grains obviously increase while the SiC grains decrease. A large number of high-temperature flocculent mullite phase appears and the high-temperature strength of the tap-hole clay is strengthened.