Advanced Materials Research Vols. 479-481

Abstract: Today, all the companies around the world are looking for the best methods and ways to store and ensure the protection of their business information. Semiconductor Manufacturing Industry has huge and quite important daily operation data to store and backup yearly. As we know the storage capabilities increases, this is clear evidence that we are handling more information every day, for this reason is critical that our process to archiving and searching the information needs to be improve it. In this paper that demonstrates the effectiveness of the database script optimization & Lean strategy. Simple changes big impact, waste elimination, improves manufacturing execution and cycle time.

Abstract: Microcapsule phase change materials were synthesized by using melamine-urea resin as shell, lauryl alcohol and butyl stearate as core. The energy saving coating was prepared by blending the microcapsules in them. The morphology of microcapsule was checked by SEM. The heat storage capacities of different coatings were detected by Differential Scanning Calorimeter (DSC). The results showed that the latent heat of microcapsule is about 202.6J/g with good heat accumulation effect, the heat storage capacity of the coating is the greatest when the film material is acrylic resin.

Abstract: The distribution of temperature on the rubbing surface is an important factor influencing the lifetime of a brake disc. With a copper-base sintered brake pad and a forge steel disc, up-to-brake experiments have been conducted on a full-scale test bench at a highest speed of 200 Km/h and a maximum braking force of 22.5 KN. The temperature distributions on brake disc surface have been acquired by an infrared thermal camera, and the contact pressure on the contact surface of the friction pair has been calculated by the finite element software ABAQUS. The results show that the area and thermal gradient of the hot bands increase with the increase of braking speed and braking force. The hot bands occur in priority at the radial location of r=200 mm and r=300 mm, and move radially in the braking process. The finite element modelling calculation indicates that the distribution of the contact pressure on the disc surface in radial direction is in a "U"-shape. The maximum contact pressure occur at the radial locations of r=200 mm and r=300 mm, and the minimum contact pressure occur in the vicinity of the mean radius of the disc. The conformity of contact pressure distributions with the practical temperature evolutions indicates that the non-uniform distribution of the contact pressure is the factor resulting in the appearance of hot bands on the disc surface.

Abstract: This paper designed a multi-information fusion algorithm after analysis information from vision sensors and radar sensors. This algorithm used D-S evidence theory to fuse the information of vision sensors and radar sensors to judge the front obstacles, and a final decision is made by the distance information provided by radar to decide whether give the driver corresponding warning. It also designed a critical vehicle distance, which can change according to relative distance and relative velocity. The test results show that this algorithm can give warning information correctly and greatly decrease the uncertainty, thus satisfying the requirement of car aided navigation system. At a resolution of 320×480, the identifying speed of this algorithm can reach 62.5ms/F which satisfied the requirement of real-time of car navigation.

Abstract: The effect of passive backup force in drilling composite materials was investigated in this study. The passive backup force formation is due to material reacting and bending. The theoretical analysis indicated that the passive backup force has a significant effect on prevention of delamination damage in drilling composite materials. When the is large enough, the effects of the passive backup force and material behavior will be attenuated.

Abstract: According to the kinematics and dynamic theory, the regenerative cutting chatter is derived on the math and simplified within the probable range. The correlation is gained between the cutting depth limit and the spindle speed about the regenerative chatter. In Matlab, the mathematical modal is simulated based on the modal parameters, cutting parameters and cutting-force coefficients. The stability lobes are drawn in the diagram, the stability zone lies under the curve and avoid the occurrence of cutting chatter.

Abstract: A statistical experimental design to the degradation of aqueous methyl orange, by using the Ti/TiO₂ nanotube array photocatalyst, under UV irradiation, was investigated. Concentration of methyl orange(5mg/L,15mg/L,25mg/L), catalytic time (0.5h,1h,1.5h) and UV light source (6w,11w,15w) were selected as major operating variables. To investigate the effects of variables to degradation rate, the statistical experiment of Box-Behnken design(BBD) and Response Surface methodology(RSM) was employed. Regression analysis showed that the experiment data accorded with the predicted values obtained from quadratic regression equation in BBD with R-Squared of 0.9806 and F-value of 39.34.

Abstract: In this research paper, the sand casting process of a cover-type part for wind turbine was investigated with ProCAST software . The cover-type casting part is big in two dimensions and it is heavy in some local positions where shrinkage cavity and porosity are very likely to from. A non-uniform mesh is used corresponding to the non-uniform wall thickness. Different casting processes are employed, simulated and optimized to obtain sound castings. Simulation results reveal that with appropriate pouring temperature, correct number, size and location of chills and risers, a smooth mold filling, reduced shrinkage and other defects are available and desired sound castings can be produced

Abstract: Nanometer α-nickel hydroxide codoped with Cu and Al has been synthesized by the ultrasonic-assisted precipitation method. The crystal structure and particle size were analyzed by X-ray diffraction (XRD) and particle size distribution (PSD). The electrochemical performance of the samples was characterized by the charge/discharge test and cyclic voltammetry. The results of electrochemical tests demonstrated that the specific discharge capacity of Cu/Al codoped α-nickel hydroxide (330 mAh/g) is much higher than that of pure spherical nickel (240 mAh/g), and it exhibits a relatively good electrochemical reaction reversibility and large proton diffusion coefficient.

Abstract: Base on the constitutive model expressed by convolution method for viscoelastic materials with damage, the initial-boundary-value problem analyzing static-dynamic behaviors of homogeneous, isotropic viscoelastic. Tiimoshenko beams with damage, placed on a viscoelastic foundation, is formulated under the case of finite deflections. And we adopt the model to simulate the dynamical behaviors of viscoelastic piles with damage placed on a viscoelastic foundation. The numerical methods in nonlinear dynamics are used to solve the simplified systems. The phase-trajectory diagrams, Poincare sections and bifurcation diagrams are all obtained. The influences of the material parameters of pile and foundation and load parameter on the dynamic behavior of the nonlinear system are investigated in detail.