Applied Mechanics and Materials Vols. 291-294

Abstract: The method was established to evaluate the product design scheme based on the grey relation. Combined with the grey sensitivity analysis the evaluation index sensitivity was researched further. Taking a vibration screen as example, its 4 design schemes were evaluated and the cost sensitivity was analyzed. The results showed that the design scheme uncertainty can be effectively overcome application of the grey relation and sensitivity analysis. The analysis method can provide scientific reference for the product detailed design.

Abstract: This paper contraposes the desulfurizer preparation system of Shanxi certain coal-fired power plant existing some problems, which contained too small paticle size of desulfurizer , unreasonable distribution, too low production-to-energy consumption ratio, too weak reliability and so on, and we implemented transformation and optimization scheme to the system, and we transformed the original a set of system into two sets of system. After transforming the system, the particle size of desulfurizer turned larger, and the particle size distribution turned more reasonable, and the production-to-energy consumption ratio increased more than 70%, in additon, reliability of the system turned more stronger.

Abstract: The aim of the present work was to develop a lain-human finite element model for cushion design to prevent bedsore by performing biomechanical analysis on interface pressure. The geometric data of the human was obtained by laser scans. The finite element model was composed of solid hexahedral elements. The material of the bed cushions was obtained according to the mechanical experiment. The human model was validated by comparing the simulation result with the experimental data. The validated finite element model could be used to facilitate, accelerate and economize the process of design of cushion.

Abstract: This paper studied the experience of Japanese cars went beyond American, according to the development of independent brand auto ,interposed the strategies of strengthening technical innovation of independent brand automobile, attaching weight to product quality of independent brand auto, and further adjusting automobile industrial policy with Chinese characteristics.

Abstract: This paper analysis principle of BLBL(Bouguer-Laanbert-Beer-Law) model, and introduce SiO2 physical parameters of the simulation experiments to verify the scope of the model and the expected value of the theoretical model. The model be applicable under the low concentrations and meets unrelated conditions. The model full-scattering method in the optics methods of measurement obtained consistent with the theoretical value.

Abstract: In order to control the print-through, the value of print-through resistance (PTR for short) was put forward to predict the print-through of lithograph. For 5 given paper samples, the relationships between their PTR and print-through (expressed with ΔD) was explored under three sets of printing condition in this paper. The results showed that the PTR increase could lead to decrease of the print-through value. In particular, no matter what kind of conditions, the print-through value was almost smaller than 0.04 when the PTR of those paper samples was larger than 72%, which seems to be the absence of print-through phenomenon.

Abstract: In this paper, Al(NO3)3•9H2O was used as raw material and the nanoparticles of Al-doped TiO2 were prepared by hydrothermal method. The nanoparticles and films were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Ultraviolet and Visible Spectroscopy (UV-Vis). The flat band potential (Efb) of nanostructured TiO2 and Al-doped TiO2 in acetone have been determined with spectroelectrochemistry measurement. The results show that Al doping decreases the energy gap and improves the absorption ability in visible region. On the other hand, Al doping TiO2 can effectively embarrass the crystal growth of TiO2. Specifically, the Efb of TiO2 and Al-doped TiO2 can be determined to be -0.6 V and -0.3V.

Abstract: Regular line and circle arry micro-apparatus on 65Mn plate formed by femtosecond direct writting with wavelength of 800 nm, repetition rate of 1 kHz and the pulse length of 130fs in air. Investigate the effect of pulse energy and scan speed. Found, that the increased scan speed was similar to the decreased pulse energy. Due to the circle pattern was different to the line process, the contrary phenomenon appeared, which with increased ablation energy, the width of groove was less and the depth was increased.

Abstract: An important problem in current analysis method is that one can hardly know the exact structural design effects when using the conventional guidelines. In order to solve the problem, the annoyance rate analytical method suitable for vibration serviceability analysis of vehicle was constructed from a viewpoint of psychophysics, based on the existing basic method of methods and referenced to experimental studies at home and abroad. As an application example of annoyance rate method, a nonlinear vibrations system with two-DOF was built. The acceleration response of the vibration system under random loads of Gaussian distribution was analyzed with the new method. The result shows that the most important advantage of the annoyance-rate method is that it has the more quantitative characteristic and its results well coincide with those of the ISO method.

Abstract: Cool-drawn 1Cr18Ni9 stainless steel wires of  0.1~0.5 mm can be woven and punched to prepare metal rubber (MR) dampers. There is certain amount of contact point/surface on wires in the transformable component and the displacements between wires are at micron levels. This kind of dampers usually works at variable load. In order to study load effect on wires’ fretting behaviors i.e. MR components’ vibration fatigue behaviors, the two  0.3 mm wires are fixed in 0.1 mm-deep grooves cutting on the traditional column-block samples and dry fretting experiments at load of 20N, 25N and 30N are made on SRV high temperature wear tester. Experiments showed that wear course of ‘fretting cell’ could be plotted as four phases: polish, adherence, forming of the third bed and stabilization. Based on data of MR vibration fatigue experiment and reference report, parameters of fretting experiment are designed and friction coefficients are collected at load of 20N, 25N and 30N. Results indicate that friction coefficient rises at the beginning of fretting and it will reach the stable phase at point of 350, 240 and 120 fretting cycles respectively. In wire’s stabilization wear phase the value of friction coefficient fluctuate around 0.4-0.42 and the amplitude is below 0.1. Friction coefficient curves at the three degree of load are close to each other. Fretting traces are measured and studied by OLYMPUS LEXT OLS3000, laser scanning confocal microscope (LSCM), and KEYENCE VHX-600, three-dimensional microscopy. This paper compares the load effect on wires’ fretting behaviors and supply data support for MR materials’ application as dampers.