Advanced Materials Research Vols. 479-481

Abstract: The traditional pot frame for military use is made of the stainless structure. This kind of frame is not only heavy, but also difficult to carry. In order to reduce the soldiers’ burden, this study adapts the Carbon fiber and reinforced nylon to make the frame more comfortable. The total weight has reduced 70% compared with the original frame, which greatly increases the protect function for military.

Abstract: Due to large flexibility in cable-stayed bridges, vibrations induced by seismic, traffic and wind loads are more significant than those in other types of bridges. These vibrations may cause structural damage, such as fatigue in stay cables, large deflection in main girder, etc. The objective of this paper is to investigate long-term dynamic characteristics of the Kao Ping Hsi cable-stayed bridge subjected to different external force conditions by using a bridge health monitoring system (BHMS). The bridge has been bearing the loads of traffic for more than a decade. To ensure the safety of the Bridge, the Bureau has developed a BHMS for the long-term monitoring of the overall structural safety over the entire operation stage in terms of seismic response, wind resisting response and cable vibration, as well as travel comfort. The BHMS will provide multi-alarm information for the study of bridge safety management and maintenance in relation to seismic activities, wind vibration and traffic.

Abstract: The effects of additive TN1, power waveforms (full wave, half wave, and direct current), current density and pH on the throwing power of Ni-Co alloy electroforming solution had been investigated by orthogonal tests; and the effects of plating parameters on current distribution of cathode by ANSYS numerical simulation were discussed. The results of orthogonal test showed that the additive TN1 had the largest effect on the throwing power; the power waveform was secondary; the current density and pH had minor effect. The biggest throwing power was 78% when the TN1 was 15g/L and waveform was full wave. Numerical simulation showed that the cathode shape and shield had effect on current distribution; reasonable cathode shape and application of shield could improve the current distribution. The thickness uniformity of part could be up to 92% by optimizing of electrolyte, adjusting the electroforming technics and applying second electroplating.

Abstract: The cationic polymethyl acrylate (CPMA) emulsion which was prepared with no soap emulsion polymerization was used with petroleum resin sizing agent in bleached wheat straw pulp and wood pulp as papermaking sizing agent. It was showed that by the experimental results that when the dosage of composite sizing agent composed of CPMA emulsion and anionic petroleum resin sizing agent was 0.2% absolute dry pulp, sizing degree and white degree of handsheet made of bleached wheat straw pulp were improved 33% and 5.2%ISO respectively. It was also showed that when the dosage of composite sizing agent was 0.2% absolute dry pulp, sizing degree and white degree of handsheet made of wood pulp were improved 37% and 4.2%ISO respectively.

Abstract: The great emphasis is currently placed on the optimal layout of individual workplaces and machines in the issue of production and production logistics. It is possible to achieve by the selecting an appropriate organizational layout form of machines and devices. There are several layout forms – technological, subject, free, modular and cellular. The paper is focused on clarifying the basic features and differences of individual machines layout and on the application these features on the specific production of certain part type through the simulation in the simulation program. There are several programs, which are used on the production simulation, for example: Plant Simulation, Simul 8, Witness etc. Witness program is the world recognized program. The utilization of individual machines layout is possible to determine by the using of this program. The simulation of production system is possible to use in the assembly system. The similar problem is solving in a project VEGA 1/0206/09 / Intelligent assembly cell.

Abstract: Omar A. Abdulkareem1a, A.M. Mustafa Al Bakri1b, H. Kamarudin1c, and I. Khairul Nizar2d 1Center of Excellence Geopolymer System Research, School of Material Engineering, Universiti Malaysia Perlis (UniMAP), P.O. Box 77, D/A Pejabat Pos Besar, Kangar, Perlis, 01000, Malaysia. 2School of Environmental Engineering, Universiti Malaysia Perlis (UniMAP), Box 77, D/A Pejabat Pos Besar, Kangar, Perlis, 01000, Malaysia. aeng.omar83@yahoo.com,bmustafa_albakri@unimap.edu.my, cvc@unimap.edu.my, dnizar@unimap.edu.my. Keywords: curing periods, geopolymerization, alkaline activator, compressive strength, fly ash.

Abstract: The imprinter bottom roller is under very high linear pressure during the work, which often causes wear and damage between bottom roller and anvil roller. Traditionally, the extra strength design method is frequently used in the design of imprinter bottom roller, which leads to the waste of materials and increase of weights. So, reasonable processing craft and appropriate theoretical analysis method should be adopted to improve the manufacturing of bottom roller and make the material strength into full use, in the condition of meeting the structure safety standard. This paper gives a brief analysis of the process craft of bottom roller and uses finite element technique to give the bottom roller numerical simulation and FEA of its deflection and strength. The results show that: in the process of work, the distribution of stress changes largely and unevenly. The stress and deformation in middle part prove the largest with decreasing to both sides successively. The imprinter bottom roller produces a maximum displacement of 0.0516 mm, which meets the work requirements.

Abstract: Traditional Pressure Swing Adsorption (PSA) approach of using single adsorbent probably makes methane concentration very close to the explosion limit and may result in explosion risk in the adsorption process, when methane concentration in coal min methane is blow 30%. Based on pressure swing adsorption, Proportion Pressure Swing Adsorption (PPSA), a new enrichment method with high safety, was suggested to enrich low concentration Coal mine methane (LCCMM). A mixture of active carbon (AC) and carbon molecular sieve (CMS) was employed as adsorbent in the process of PPSA. The methane and oxygen in CMM were adsorbed simultaneously. The experimental study was carried out in order to verify the feasibility of this method. The equilibrium adsorption characteristic of AC and CMS were tested, the mixture of AC1 and CMS5 are chosen as adsorbents for LCCMM enrichment by PPSA.

Abstract: A local and formal RC frame building in Wenchuan dicstrict, named Shuang-he market building which is damaged in 2008 Wenchuan earthquake, is studied by nonlinear finite element method. By using probabilistic seismic demand model (PSDM), the seismic fragility assessment of the RC frame is demonstrated on RC frames. Probabilistic seismic demand model (PSDM) for RC frame structures was built to assess the safety levels of the actual RC frames representative of design and construction practices in the Wenchuan county town. The fragility curves for immediate occupancy, significant damage, and collapse prevention damage levels of the RC frame building are analyzed. The result reveals the safety levels of RC frame building in Wenchuan district before the 2008 Wenchuan earthquake.

Abstract: A method about analysis and simulating metal cutting process on lathe is introduced through establishing the system’s mathematic model by using MATLAB tools. The effects of cutting and machine tool’s structure parameters on the performance of metal cutting process are obtained, which will provide a theoretic basement for optimizing the performance of metal cutting process.