bluuebunny/crossref_metadata_2025 huggingface dataset:
Ultrasonic Characterization of Co-Additives Effects on Elastic Moduli and Acoustic Properties of Li1-xCoxFe2O4
Authors: Al-Suraihy Ibrahim , Doghmane Abdellaziz , Hadjoub Zahia
Published: September 2013

Acoustic microscopes can be used to measure Rayleigh and longitudinal wave velocities in a specimen at microscopic resolution. These velocities are deduced from the analysis of the so-called acoustic signatures or V(z) curves. Such curves are obtained by recording the output signal, V, as the specimen is defocused along the z axis of the lens. In this context, we investigate Co-Additives effects on reflectance functions, R(θ) and acoustic signatures. The elastic properties of Lithium cobalt mixed ferrites of different compositions from the experimentally and simulation observed that the values of longitudinal wave velocities vary from 5072 m/s to 6833 m/s whereas transverse velocities from 3084 m/s to 4105 m/s. The variation of the elastic moduli with composition was interpreted in terms of the binding forces between the atoms.
The Effect of Zeolite on the Crystallization Behaviour and Tribological Properties of UHMWPE Composite
Authors: Boon Peng Chang , Hazizan Md Akil , Md. Nasir Ramdziah
Published: September 2013

In this work, the effects of adding different filler loadings (520 wt%) of zeolite to the ultra-high molecular weight polyethylene (UHMWPE) matrix on the crystallinity behaviour and tribological properties were studied. The zeolite/UHMWPE composites were fabricated using hot compression moulding. The crystallization behaviour was investigated using differential scanning calorimetry (DSC). The tribological properties were monitored using a Ducom TR-20 pin-on-disc tester under different sliding speeds of 0.209 ms-1 and 0.419 ms-1 and with various applied loads of 5, 10, 15, 20, 25, 30 and 35 N. The worn surfaces of the zeolite/UHMWPE composites were observed under the scanning electron microscope (SEM). The results showed that the addition of zeolite into UHMWPE matrix can effectively enhance the percentage crystallinity of the UHMWPE. 15 wt% zeolite-reinforced UHMWPE composites show the increase of 47% in percentage crystallinity as compared to pure UHMWPE. The wear mass loss of the composites was found to be reduced by the incorporation of zeolite in UHMWPE. In addition, the average coefficient of friction (COF) was also found to decrease with the addition of zeolite. The lowest average COF was obtained by 20 wt% zeolite reinforcements into UHMWPE. Shallower grooves and smoother worn surfaces were observed for zeolite/UHMWPE as compared to pure UHMWPE.
Mechanical Properties of Rubber Toughened Polyester-Kenaf Composites under Active Environment
Authors: Bonnia N.N. , Shuhaimen N.S. , Redzuan A.A.
Published: September 2013

In this study rubber toughened polyester composite filled with kenaf was exposed in different environmental condition such as in artificial sea water (SW), distilled water (DS), environment exposure (Ex) and soil exposure (SL). Rubber-toughened polyester-kenaf fibre composites were prepared by adding 25% of kenaf fibre in unsaturated polyester resin and cross linked with a mixture of methyl ethylketone peroxide and cobalt octanoate. Three percent (3%) of liquid natural rubber (LNR) were added as a toughening agent. The sample was prepared using compression molding technique. The mechanical properties of the composites were evaluated by hardness, flexural and fracture toughness testing. It was found that the samples that being immersed in seawater (SW) had lower mechanical properties as compared to other conditions. The value of hardness strength were decrease about 1.7% and for fracture toughness the decreasing is about 8.53% while flexural strength had been decrease by 30%. Bonding mechanisms were then assessed by scanning electron microscope and FTIR analysis
Study on the Properties of Blends between Acrylonitrile-Butadiene Rubber and Acrylonitrile-Butadiene-Styrene or Poly(Styrene-co-Acrylonitrile)
Authors: Yasinee Wuttison , Supakanok Thongyai , Sirirat Wacharawichanant , Praserthdam Piyasan
Published: September 2013

Acrylonitrile-butadiene rubber (NBR) or nitrile rubber is an unsaturated copolymer of butadiene and acrylonitrile. NBR has been widely used for fuel hoses, seals and gaskets due to its excellent oil and fuel resistance. Aiming to develop NBR which has resistance to oxygenated solvent, NBR with acrylonitrile content of 34 wt%, was blended with Acrylonitrile-butadiene-styrene (ABS) and Poly (Styrene-co-Acrylonitrile) (SAN) as binary polymer systems. The NBR/ABS and SAN blends were prepared by mechanical blending in the composition of 80/20, 70/30 and 60/40 w/w. The effects of ABS or SAN content on mechanical, morphological and thermal properties were investigated and compared with commercials NBR. Mechanical properties were determined using the tensile testing machine. The morphologies of polymer blends were investigated using scanning electron microscope (SEM). The thermal properties were examined using differential scanning calorimeter (DSC), thermal gravimetric analysis (TGA) and dynamic mechanical analysis (DMA). It has been found that percent compatibility of ABS and SAN into NBR rich phase are 2.69 and 1.53 wt% respectively.
Thermal Analysis and Surface Morphology Study of Cholesterol: Β-Cyclodextrin Inclusion Complex
Authors: Fauziah Che In , Zaibunnisa Abdul Haiyee , Osman Hassan , Wan Aida Wan Mustapha
Published: September 2013

nclusion complex of cholesterol:β-cyclodextrin (CβIC) was characterized for thermal analysis by differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). The difference of endothermic peak between inclusion compounds of cholesterol:β-cyclodextrin (CβIC) with pure cholesterol and β-cyclodextrin endothermic peaks confirmed the formation of inclusion complex. SEM results showed that of cholesterol:β-cyclodextrin inclusion complex (CβIC) observed in the form of irregular crystalline particles which has different morphology from CHO and βCD. The results obtained from this study will able to give valuable information about cholesterol-reduced egg yolk properties that could be useful to produce healthy-egg yolk based products.
Effect of Epoxidized Palm Oil Loading on the Swelling and Mechanical Properties of SBR Vulcanizates
Authors: Nurul Ayunie Mohd Zaki , Romli Ahmad Zafir , Wahab M.A. , Abidin Mohd Hanafiah
Published: September 2013

The effects of epoxidized palm oil (EPO) content in carbon black filled styrene butadiene rubber (SBR) on tensile strength, elongation at break and crosslink density were investigated. Five different loadings of EPO in parts per hundred rubbers (phr) were used to test the tensile strength of the carbon black filled SBR which showed a decreasing trend as the content of EPO in the vulcanizates increased. In contrast, elongation at break showed the opposite trend where the elongation at break increased as the content of the EPO increased. The SBR vulcanizates with the highest content of EPO gave the highest value of elongation at break which is 2393.56%. In the case of swelling index, it was found to increase as the amount of EPO increased.
Formulation and Evaluation of Avocado Oil Nanoemulsion Hydrogels Using Sucrose Ester Laureate
Authors: Mohamed Salama Mohamed , Ahmad Mustafa Masoud Eid
Published: September 2013

Nanoemulsion is a new class of emulsion with uniform and extremely small droplet sizes, typically in the range of 20-200 nm. Avocado oil was proven to be used as anti-aging and moisturizing agent. This study aimed to characterize nanoemulsion hydrogels prepared using avocado oil and sucrose ester laureate as surfactant. The nanoemulsion hydrogels were prepared by nanophase emulsification technique. These formulations were examined using zetasizer to determine the mean diameter of dispersed oil droplets, polydispersibility index (PDI) and zeta potential.The viscosity of the prepared nanoemulsion hydrogel was also studied. The results revealed that nanoemulsions prepared with 50% w/w oil, 30% w/w glycerol and 20% w/w surfactant showed droplets size below 200 nm with good polydispersibility index and zeta potential < -30 mV. The optimum formulation of nanoemulsion was prepared in the form of nanoemulsion hydrogel using carbopols 934 and 940. The results of the rheology for the nanoemulsion hydrogel showed that the storage modulus (G) which describes the elasticity of the component were greater than the loss modulus (G) values that reveals the viscosity of the component.
Thermal Analysis of Kenaf Sandwich Panel
Authors: Nor Hasnidawani Johari , Hassan Noor Azlina , Halim Zahurin
Published: September 2013

The introduction of the eco-core sandwich panel composite is contributing a new approach to the designer to achieve high performance and light weight. In this research project, the new kenaf eco-core sandwich panel will be developed and then laminated with galvanized steel. The final goal is to find the optimum eco-core metal matrix composite sandwich structure with maximum mechanical properties such as stiffness and buckling. Kenaf eco-core sandwich will be fabricated and study on the interaction between eco-core sandwich panel and metal faces will be performed. The characterization of the eco-core sandwich panel will be done using different analytical tools. This study would provide a way to enhance the application of this new eco-core metal matrix composite sandwich structure.The amount of sample used was approximately 12 mg. The temperature profile was from 27°C to 1000°C at a heating rate of 10°C/min. In this study, result shows that degradation of composites starts to occur at about 180°C. Increasing the kenaf percent ratio will decrease the percent residue.
Degradation Behaviour of Thin Polymer Films of Poly(Amide Ester) Hydrogel Using Quartz Crystal Microbalance
Authors: Kamarun Dzaraini , Norizan Ahmat , Krause Steffi , Hunter Chris , Milanesi Lilia
Published: September 2013

Quartz Crystal Microbalance (QCM) has been typically used as a mass sensor in the study of monolayer and multilayer depositions and dissolution, mass transport in polymer films on electrodes, corrosion processes at electrodes and mass changes caused by protein adsorption at electrodes. Thin films of an aromatic poly (amide ester) hydrogel with hydrolyzable cross links were prepared in-situ on a gold-coated quartz crystal which is the transducing element of a Quartz Crystal Microbalance (QCM). Here we report the synthesis and degradation behavior of an aromatic poly (amide ester) hydrogel with hydrolyzable cross links using QCM. Degradation of the hydrogel films was found to proceed with Δf increment, indicating mass decrease and is in line with the theory proposed by Sauerbrey. Films with a higher cross-link density underwent partial degradation with swelling; and are depicted as a decrease in the Δf values with time. Deviation from the general base catalysis of ester hydrolysis was observed at higher base concentration due to the biphasic environment of the hydrolysis reaction.
Effect of Heat Treatment on the Mechanical Properties of Roll-Bonded Al3003/STS439 Hybrid Plate
Authors: Jin Ju Young , Kim In Kyu , Hong Sun Ig
Published: September 2013

In this study, roll-bonded Al/STS clad was heat-treated at various temperature (200-600 °C) for 1hour and then their mechanical performance and interfacial structure was studied. To estimate the mechanical properties of heat-treated clad materials at various temperatures, the tension tests were performed. For Al/STS clad heat-treated from 200 °C to 500 °C, no interfacial reaction layer was observed. Brittle intermetallic layer was observed between Al and STS, which induced the interface crack due to the large mismatch of the thermal expansion coefficient between two metal plates. XRD peaks from the interface region indicate the presence of Al2Fe, Al5Fe and Al13Cr2 in addition to Fe, Cr, Al and Mn. The UTS of Al/STS sheet was observed to follow the rule of mixture. One noticeable observation from stress-strain responses is that the fracture strain of Al/STS clad sheet increased markedly more than that of Al clad sheet by the increasing heat treatment temperature.
Homology Analysis of Prior Austenite Grain Size of SAE52100 Bearing Steel Processed by Cyclic Heat Treatment
Authors: Nakane Kazuaki , Kida Katsuyuki , Mizobe Koshiro
Published: September 2013

Here, we introduce the mathematical methods to quantitatively evaluate the change of the tissue to quenching. SAE 52100 sample was repeatedly quenched and the influence of this cyclic heat treatment was investigated. The repeated quenching process increased the retained austenite content and had little influence on the materials hardness. The prior austenite grain size was decreased and consequently, refinement of the martensitic phase in the material occurred. The higher content of the retained austenite (higher fracture toughness) and the refinement of the microstructure accounted for the higher fatigue properties of the repeatedly quenched material. Here we use mathematical homology to quantify these features.
Homology Estimate of Grain Size Measurement Based on the JIS Samples
Authors: Nakane Kazuaki , Mizobe Koshiro , Kida Katsuyuki
Published: September 2013

Test method for measuring austenite and martensite microscopic grain size of the steel is commonly done. Determination of average crystal density for the specimen is defined by JIS (Japanese Industrial Standards) in Japan. In general, this kind of determination is carried out by engineers. The results may depend on their skill, so automated tool to determine the grain size is needed. In this paper we try to apply homology method to analyze the structures. As the first trial, we apply this method to the figures on JIS. The result of homology is compared with the grain size defined in JIS. We can make sure the correlation between grain size and the homology value.
Nickel Base Alloy Powder Spray Welding Process Application in Production
Authors: Xu Yu Hai , Zhao Yu Ping
Published: September 2013

In this paper, we study Spray welding technology has been widely used in our country, it is between the spraying and welding process, the workpiece surface after spray welding coating is thin and smooth, dilution rate is extremely low, the deposited layer and base metal metallurgy, high bonding strength, density, and coating no slag inclusion, porosity and oxidation is suitable for occasions with thin coating. In 45Mn parent metal, for example, this paper mainly introduces the application of the technology in production.
Conceptual Design of a Multi-Functional Hot-Dip Galvanizing Simulator
Authors: Hao Xiao Dong , Zhang Qi Fu
Published: September 2013

Simulation techniques play a crucial role in determining a successful engineering design. A multifunctional galvanizing simulator is the basic equipment for enterprise to acquire the process information for producing annealed sheets, galvanized sheets and galvannealed sheets under laboratory conditions. This paper extended Geros function-behavior-structure framework and used this framework for the conceptual design of a multifunctional hot-dip galvanizing simulator.
Experimental Research on Flotation of Copper Oxide Ore in Guizhou
Authors: Pang Wen Hao , Liu Quan Jun , Ding Peng
Published: September 2013

The ore samples which contained 1.15% Cu were selected from one copper oxide ore in Guizhou. The oxidation rate of copper mineral was up to 83.48%. The run-of-mine ore characters were thorough studied. On the basis of the analysis of raw ore properties, the copper concentrate with grade above 22.1% and recovery of 88.52% were obtained by using a new type of highly efficient compound collector and the process flows with one roughing-two cleaning-two scavenging.
Restoration of Disturbed Lands as the Factor of Environment Safety and Population Health in Mining Towns in the South of the Russian Far East
Authors: Krupskaya Lyudmila Timopheevna , Zvereva Valentina Pavlovna , Krupskiy Alexander Valerievich
Published: September 2013

The results of research of environmental and social security of tin processing toxic waste stored in the tailing ponds are shown. To reduce the negative environment impact the necessity to develop the measures, including restoration of mining disturbed land, was substantiated.
Study on the Beneficiation Process of a Nickel Oxide Ore
Authors: Shi Gui Ming , Yu Xia Jing
Published: September 2013

For a nickel oxide ore, 1# ore sample was treated by sulfuric acid leaching and 2# ore sample was treated by ammonium sulfate roasting-sulfuric acid leaching through exploring experiments. The leaching rate of 92.04% with l# nickel oxide ore and the leaching rate of 72.36% with 2# nickel oxide ore were obtained by conducting the conditional experiments of sulfuric acid concentration, leaching time, ammonium sulfate dosage and so on.
Effect of Heat Treatment on the Bending Behavior of STS/Al/STS Hybrid Metal Plates
Authors: Kim In Kyu , Hong Sun Ig
Published: September 2013

The microstructures and bending properties of STS439/Al1050/STS304 clad plates were investigated after annealing process at various temperatures. Interfacial layer was developed at the STS439/Al1050 and Al1050/ STS304 interfaces at 550OC. The presence of Al3Fe2 at the STS/Al interface was confirmed by EDX. The initial bending hardenability and load under condition A (STS439 side in tension) was found to be greater than under condition B (STS304 side in tension). The higher hardenability and load under condition A can be explained by the greater strain hardenability of STS439 (bottom side) in tension. No interfatial cracks were observed across the interface in the as roll-bonded clad composite and annealed clad composites at 450OC. After annealing at 550OC, the load drops in the early part of load-displacement curves associated with the interface debonding was observed. As-rolled clad metal and that annealed at 450OC exhibited the relative high load.
Effect of LiCl·H2O on Sintering Properties of MgO from Bischofite
Authors: Huang Qiong Zhu , Lu Gui Min , Yu Jian Guo
Published: September 2013

Effect of LiCl·H2O on sintering properties of MgO prepared from natural brine from Qarhan Salt Lake, crystalline bischofite and MgCl2·6H2O(AR) was studied. The results showed that LiCl·H2O of addition exceeded 1 wt% had promoting effect on sintering of magnesia prepared from MgCl2·6H2O(AR). While 1.5 wt% LiCl·H2O was added, the bulk density of magnesia was 3.40 g/cm3, and the relative density was 95.0%. With 0.5 wt% LiCl·H2O, the bulk densities of magnesia prepared from crystalline bischofite and brine were 3.04 and 3.10 g/cm3, and the relative densities increased by 8.4% and 14.8%, respectively. The main mechanism for promoting MgO sintering with LiCl·H2O was that Li2O produced by hydrolysis solubilized in MgO to form solid solutions and oxygen vacancies which were favorable to sintering. The main reasons for promoting sintering of brine magnesia with LiCl·H2O were solid solution and liquid phase sintering, while the main reason was solid solution for magnesia from crystalline bischofite and MgCl2·6H2O(AR).
Controlled Release Behaviors of Ketoprofen from Matrix Polymer of Chitosan and poly(ethylene glycol)
Authors: Thitipha Chimsook , Chimsook Thitiphan
Published: September 2013

The aim of present work was to prepare floating microsphere of ketoprofen using matrix polymer of chitosan and poly (ethylene glycol) by solvent diffusion method. The floating microsphere of ketoprofen was prepared from matrix polymer of chitosan and poly (ethylene glycol) with various composition ratios and evaluated such as particle size, drug compatibility and drug release of microspheres. The scanning electron microscopy of microspheres confirmed their hollow structures with smooth surface. Formulation CPK 4 to CPK 6 exhibited the best controlled release pattern in ketoprofen. The concentration and size of poly (ethylene-glycol) affected the particle size, percentage yield and drug release of microspheres.
Intelligent Numerical Manipulation of Micrometer-Scale Emulsions Using Polymer Confinement
Authors: Zhang Li Guo , Xue Le Xun , He Pei Yuan , Qi Yuan Ming , Lu Yu Min
Published: September 2013

The manipulation of emulsions at micrometer-scale is a challenging topic for industrial application, especially for monodisperse microemulsions production. The development of material science and afterwards the creation of polymer confinement proposed efficient devices for micrometer scale emulsions fabrication. In this work, the flow regime of emulsion generation was studied to depict numerical manipulation of micrometer-scale emulsions through biomicrofluidic technology. At first, correlation analysis between experiment conditions and results were conducted, then different linear modeling and non-linear modeling, including Artificial Neural Network Modeling (NNM) technology, were performed to characterize the emulsion variation. Both models can well manipulate emulsion variation. Compared with linear modeling, non-linear models ameliorate the performance on the manipulation of micrometer-scale emulsion.
Experimental Measurement of Induction Period of Gypsum Precipitation in the Laminar Flow State
Authors: Cheng Huai Gang , Song Hui Ping , Cheng Fang Qin , Li Zhi Hong
Published: September 2013

The gypsum precipitation was investigated under different conditions of temperature and supersaturation, which has significant effects on the optimization of humidification-dehumidification process. The spectrophotometer was used to measure the precipitation induction period of gypsum. The primary nucleation of calcium sulphate solution was investigated with the combination of nucleation induction period and classical nucleation theory. It was found that a power relation existed between the induction period and the operation conditions.
Preparation of Porous Mullite Ceramics with Low Thermal Conductivity
Authors: Gong Lun Lun , Wang Yong Hong , Cheng Xu Dong , Zhang Rui Fang , Zhang He Ping
Published: September 2013

Porous mullite ceramics were prepared using an industrial grade mullite powder by foaming and starch consolidation method. The influence of solid loading of suspension and sintering temperature on the porosity of samples was evaluated. The sintered mullite ceramic with porosity from 73 to 86 vol% contained the microstructure with spherical pores and a larger mean pore size. Thermal conductivity measurements were carried out by the hot-disk technique at room temperature resulted in values as low as 0.09 W/(m·K).
Structure Relaxations during the Isothermal Annealing of Amorphous Ca7Mg3 Alloy
Authors: Zhou Li Li , Peng You Lin , Luo Hui , Liu Rang Su
Published: September 2013

The molecular dynamics simulation studies on the microstructure evolution properties of amorphous Ca7Mg3 alloy during the isothermal annealing have been performed. The simulated structure factor S(q) of Ca7Mg3 is well agreed with the experimental data. Results indicate that the metallic glass of Ca7Mg3 alloy is relaxed into amorphous structure of greater stability in which much more icosahedron structures is formed; interestingly, it is also found that the short short-range order has no change, while the short-range order of the system increases during the isothermal annealing process.
Determination of the Elastic Modulus of Hydroxyapatite Doped with Magnezium through Nondestructive Testing
Authors: Suciu Oana , Bereteu Liviu , Drăgănescu Gheorghe , Ioanovici Teodora
Published: September 2013

In this paper there are presented determination methods of longitudinal elasticity modulus based on processing and analysis of vibration signals which are the results of an impulse from a small rigid ball applied on some samples of hydroxyapatite with discoid form. Hydroxyapatite is a bioactive bioceramics used, usually in implants, rods and screws covering, in order to allow human tissue to adhere to implant surface. In order to improve mechanical properties of hydroxyapatite it is doped with magnesium. This chemical element exists in normal bone tissue; it doesnt create any compatibility problem and has a stabilizing role in heat treatments stopping undesirable phase transformations.
Comparative Assessment of Composite Materials Performance Subjected to Fillet and Butt Welding
Authors: Galaţanu Sergiu Valentin , Pascu Romulus , Dome Monioa , Dragoi Sorin
Published: September 2013

This study presents a comparative assessment of composite materials performance, based on 80%Al+20%CrC, 82%CuNiAl+18%WC and 82%CuZn48+18%CrC, butt welded and corner welded. This comparative assessment resulted in information regarding the chemical content of the welded joints in percent, macro-microstructure estimation of specific areas of the welded edge joints, and determination of HV5 hardness of specific areas of the welded joints, both for butt welding and corner welding. It was shown that there is a slight variation of chemical composition both for butt welding and corner welding. Also all nanostructured composite materials, butt welded and corner welded, examined for macroscopic and microscopic examinations showed no welding defects. After testing the HV5 hardness of specific areas of butt and corner welded joints, made using WIG and CMT welding processes, the estimator value for structural hardening ΔHV5 between specific areas (WELD, HAZ, BM) was determined.
Some Aspects Regarding the Analysis of Straight Rods with Polygonal Cross Section Subjected to Torsion
Authors: Glovnea Marilena , Suciu Cornel , Spînu Sergiu
Published: September 2013

The present paper aims to model straight rods having regular polygonal cross sections, analyzing in particular triangular cross sections (isosceles and equilateral triangles) as well as rectangular cross sections subjected to torsion. Stress and strain states for such cross sections under torsion were determined and plotted as 3D and contour plots using Mathcad.
Keywords: torsion, polygonal cross section, modeling.
Eye Bars - Pins Connections
Authors: Petzek Edward , Butiscă Anamaria , Toma Luiza
Published: September 2013

This type of connections was used from the beginning of the steel constructions and is very efficient in some typical cases. Connections with eye bars and pins were used initially in suspension bridges, cantilever truss girders and other structures. In modern steel structures this type of connection is often used in cases when simple solutions are necessary like scaffoldings, mobile structures, emergency bridges, etc, or cases in which a certain rotation (pin connection) is desired like structures on cables, chimney, cable stayed bridges and bowstring bridges. At the end of the 19th century and the beginning of the 20th century, when the technology of foundation was not yet developed, engineers preferred the cantilever arrangement (known also as the Gerber system) to the continuous bridge, because it has favourable moments along its length and is not subjected to settlement stresses. It is important to mention that the cantilever truss girder is easier to analyse. However a cantilever arrangement requires special hinge connections and is less rigid than a continuous one. Some famous bridges have been built in this system. One of these structures of the past is the Traians bridge over the Mures in Arad, erected in 1910. The main cantilever truss has the following spans: L = 50,05 + 85,30 + 50,05 = 185,40 m. After two World Wars and other damages the bridge is still in operation for usual traffic - cars and tramways (with restrictions for trucks). The bridge is a historical monument of the engineering science and has a remarkable aesthetic aspect and an emblematical importance for the city of Arad. One of the aspects of the rehabilitation project is the analysis of the Gerber hinge which consists of lug plates and bolts in order to assure the movement of the suspended central part of the structure. These elements have to support the reaction force from all the loads on the bridge and they have a complex stress distribution. Due to the different events, the increasing of the traffic and traffic loads, the existence of cracks in these plates is possible and probable. The paper includes also the evaluation of the technical state of the bridge, stress evaluation based on 3D analysis, assessment of the remaining fatigue life.
Structural and Mechanical Characterization of Hard Layers Obtained by Plasma Jet Thermal Spraying
Authors: Pascu Romulus , Buzdugan Dragos , Dragoi Sorin
Published: September 2013

In many countries, in the industrial practice, the hard layers deposition is used to increase the hardness of the components active zones. A viable solution to increase the imposed properties consists in the deposition of amorphous layers by thermal spraying. Ferroalloy powders were deposited by plasma jet thermal spraying on aluminium substrates in order to increase the hardness. By plasma jet thermal spraying of Fe-B, Fe-Ni-B and Fe-Cr-Mn-Mo-W-B-P-Si powders on aluminum supports, have been obtained hard layers having the thickness between 72 μm and 86 μm, and granular structures made from α solid solutions, fine particles of specific oxides and complex particles of Fe-B, Fe-B-Si, Fe-Cr, Fe-W-Mo and Fe-P. The measured hardness had the values between 383 and 391 HV1 for the deposited layers made from powders type Fe-B, the values between 410 and 420 HV1 for the deposited layers made from powders type Fe-Ni-B, and the values between 448 and 475 HV1 for the deposited layers made from powders type Fe-Cr-Mn-Mo-W-B-P-Si. No defects, such as cracks or microcracks, have been observed on the hard layers surfaces deposited by plasma jet thermal spraying.
Synthetic Analysis and Simulation of One-Side Processing Profile Error of Globoidal Cam
Authors: Chen Xiao Gao , Hu Zi Hua
Published: September 2013

Aiming at globoidal cam one-side machining errors in addition to programming error, there exists combined effects of a number of the original errors, such as, machine motion error, tool error, fixture error and et al. On basis of the analysis of the principle of one-side processing, the theoretical calculation synthetic model of the one-side machining profile normal error is established based on the multi-body system error modeling theory and spatial mechanism conjugate meshing principle. And by applying Newtons iterative method and simulations in Matlab, the law of comprehensive influence of each original error on globoidal cam profile normal error is revealed. The simulation results verify the correctness of the theoretical calculation error synthetic model, and a scientific proof is provided for further improving machining accuracy of one-side machining of globoidal cam.
Study on the Manufacturing Service Trading Platform Based on Processing Behavior
Authors: Zheng Jin Xing , Gang Zhao , Zhao Yang
Published: September 2013

Collaboration, cloud computing have been identified as key business technology trends that will reshape enterprises worldwide. Cloud manufacturing (CM) - the manufacturing version of cloud computing can be implemented by various approaches. A part model based on processing behavior was developed and the definition, classification and data structure expressed by XML were presented. Processing behavior as trading service unit, can be requested or responded by designer clients or manufacturer clients on the trading service platform. Meanwhile, the data exchange protocol and trading mechanism were analyzed, and the workflow of the trading service platform was given. Finally, a case study of manufacturing trading service platform was demonstrated, which enable designers and manufacturing to make a deal, exploring the specific application of could manufacturing.
Gear Strength Optimization Analysis of Automobile Gearbox Based on the Software of MASTA
Authors: Wang Hong , Yu Fu Jin , Huang Kai Long , Li Yong Xiang , Shen Wen Quan
Published: September 2013

Automobile gear, as key part of automobile gearbox, bears the torque of automobile transmission, whose strength will directly affect the transmission efficiency of automobile gearbox and the service life of transmission system. On the basis of gear transmission theory, This paper focuses on gear pair of an automobile transmission as the research object, with the help of the professional transmission system software of MASTA, to realize the gear meshing analysis of the automobile gearbox, establish the simulation model of the automobile gearbox, simulate the actual load condition to complete the process analysis of the gear transmission. Finally, the strength optimization analysis of gear pair is implemented to obtain the reasonable gear design, which is more close to the gear meshing transmission process. There are great benefits to improve the overall performance of the automobile gearbox, effectively reduce the test cost, shorten development cycle, and optimize product structure. Therefore, it will provide guidance for the development and application of new transmission gear in the future, and present a new perspective and approach for the optimization analysis of gear strength.
Influence of Fluid-Structure Interaction on Control Accuracy of a High-Flow Control Valve
Authors: Cao Fang , Wang Yong
Published: September 2013

According to the real structure and work condition in recycling generating electricity project, a fluid-structure interaction (FSI) system model of high-flow control valve is set up. The flow and pressure in coupling and uncoupling condition are investigated. Representative points close to the valve are selected as control targets, the control accuracy of flow and pressure is studied. The impact of FSI on flow and pressure is analyzed. It has an important guiding significance for numerical simulation on FSI problems in the actual project to research on pressure and flow of control valve based on FSI. And it provides theoretical guidance for the optimization design and experiment of control valve.
Design and Simulation of a New Type of Device for Dividing Air Flow Equipped on the Agricultural Product Baking House on Solidworks
Authors: Liu Jun , Jia Zhen Wei , Guo Rong Xing , Li Yan
Published: September 2013

In order to solve the problem that the air flow was not average in the baking room, a new type of device called air flow-divider by this paper was designed. The physical model of the device was built by Solidworks. The influence of the device towards air flow was simulated by FloXpress. The result of the simulation indicates that the air flow was more even in the baking house after the new device was fixed.
Eccentric and Nonuniform Axial Force Analysis Based on Steel Tube Components of Recycled Resource
Authors: Tang Yun Chao , Feng Wen Xian , Zhang Ye
Published: September 2013

To make great use of recycled deserted solid and concrete confined by steel tube has been one of the most significant tasks for sake of green low-carbon production and environmental-friendly sustainable development, especially now, as the earthquakes in recent years have resulted in a host of deserted solids and concrete wastes. Engineering application of recycled-aggregate-concrete-filled (RAC-filled) steel tube is a new challenge facing humanity. Force of Steel tube components in practical engineering application is nonlinear and random. Owing to the difficulty in conventional method, it becomes a main subject to reveal the nonuniform axial force mechanisms of steel tube components. First of all, this article adopts finite element method (FEM) to simulate actual force, to analyze mechanics of axial force of steel tube components under uniform, nonuniform and eccentric conditions, thus building a mechanical model. Then the effect on the load capacity of steel tube caused by local factors such as steel tube components under different force conditions and deformation in the process of steel tube production is analyzed. Finally, the three force simulations of circular steel tube components in the diameter of 165mm, a wall thickness of 4mm and 2mm are carried out separately, it turns out that the error of component with a thickness of 2mm is 4.96% while the other is 7.35%. Obviously the simulation and experimental results fit relatively well. Besides, eccentric load is related to eccentricity: the larger the eccentricity is, the smaller the load capacity is. Moreover, it needs to be singled out that nonuniform capacity is greater than centralized eccentric axial load capacity. The research results demonstrate that different parameter selection,different force and manufacturing precision of steel tube and its component exert relatively high influence on load capacity of component. The results also indicate that variety of force conditions and deformation has to be considered in applications of RAC-filled steel tube. Thus, the research provides reference and basis for RAC-filled steel structure design and manufacturing.
Research of a Small-Sized Magnetic Hydro-Cylinder without Piston Rod
Authors: Song Yi Lin , Zhang Shun Ping , Gao Shu Mei
Published: September 2013

In order to develop a device for the elderly on bed for long-term to do legs rehabilitation exercise, a small-sized magnetic hydro-cylinder without piston rod is researched. The finite element analysis software--Ansoft Maxwell and an experiment device developed by us are used to analyze and to research the magnetic coupling force performance, the effects of the arrangement of the magnet, the separation distance between the magnets and the magnet thickness on the cylinder performance. Finite element analysis and experimental results show that the cylinder wall thickness should be thinned under the premise of meeting the strength requirement, the magnets should be arranged in the reverse direction, the separation distance between the adjacent magnets should be set to 4 mm, the thickness of magnet should be set to about 10 mm. Under those conditions, the better performance of magnetic hydro-cylinder without piston rod can be gotten, and the miniaturization of the cylinder structure can be realized.
Research on Synthesized Modular Modeling Based on General Mathematic Model of Arbitrary Rotary Helical Surface
Authors: Gu Li Zhi , Zhou Zong Zhi
Published: September 2013

Based on the analysis of the helical surface movement forming principle, adopted synthesized modular modeling ideas, realized the construction of a complete helical surface mathematical model consisting of three core elements, element of the general mathematical model of rotator generatrix profile, element of the general mathematical model of characteristic line and element of the general mathematical model of transformation between the cross-section coordinate system and workpiece coordinate system. Generatrix of the linear-typed contour, the arc-typed contour, the higher order equation-typed contour, and the discrete point-typed contour was investigated systematically for the model. With the synthesized modular model, if the specific profile of a helical Component is given on the cross-section, it is of convenience and ease to obtain the concrete parametric model of the helical surface, simply by changing the parameter settings through the interface to acquire any types of helical surface model, thereby increasing the efficiency of modeling and providing technical support for the precise model of the helical surface with parameterization.
Research on Mathematical Modeling and Kinematic Simulation of Elliptic Family Gears
Authors: Xia Lian , Li Da Zhu , Han Jiang
Published: September 2013

Elliptic family gears are commonly used in non-circular gears, which include elliptic gear, high-order gear, elliptic deformed gear and high-order deformed gear, thereinto high-order deformed gear can include the elliptic family gears through adjust its order and deformed coefficient. Because non-circular gear has different tooth profile in different position of pitch curve and there is difference in the left and right tooth profile of the same gear tooth, thus the CAD modeling of non-circular gear is difficult for these characteristics; but the precise model of non-circular gear has important significance to the realization of numerical control machining, kinematic simulation and relevant mechanical analysis. This paper deduce the corresponding pure rolling mathematical model based on the pure rolling contact theory that cylindrical gear and non-circular gear mesh in the end face, and realize the CAD modeling of non-circular straight and helical gears by letting the cylindrical gear and non-circular gear make solid geometry operation, which is suitable for pitch curve with convex and concave. The non-circular gear shaping methods with equal polar and equal arc length are simulated by setting different discrete polar angles, and the transmission ratio curve and the angular acceleration curve of driven gear are get through the kinematic simulation of gear pair, which realize the transmission performance analysis of elliptic family gear pair. The above research results can be applied to the modeling and kinematic performance analysis of other non-circular gears.
Research and Application of NC Machine Tool Energy Consumption Control Optimization
Authors: Xu Xiu Ling , Wang Hong Liang , Yu Tian Biao
Published: September 2013

The numerical control machine tool, which is a typical energy-using product, because there are all sorts of energy loss and auxiliary functions, has low efficiency in machining process. Author makes a study of NC machine tool energy consumption controlling. With simens840Dsl numerical control system as an example, based on the analysis of CNC system control principle, according to processing characteristic of the part, the macro program is wrote to optimize dynamic characteristics of NC machine tool. According to the machine idle time in different work condition, three energy-saving control profiles are formulated, including machine standby, NC standby, auto shut off. By the formulation of the corresponding PLC control logic, low energy consumption of intelligent control of NC machine tool is realized. Integrate PAC3200/4200 multi-function meter in NC machine tools, quantitative measurement and analysis of energy consumption for numerical control system and ancillary equipment can be implemented, and machine tool real-time energy data can be obtained. This scheme has been successfully applied in long-men portable CNC machine tools, and obtained the ideal effect: to realize the optimize control of energy consumption, improve the performance of the machine tool, become more market competitiveness.
Product 3D Dynamic Display and Lectotype System
Authors: Ye Jian Hua
Published: September 2013

With the information technology development, the manufacturing informatization has developed rapidly in recent years. 3D computer aided design (CAD) has become indispensable for developing new products. Network also plays an important role in exchanging information. In this case, people have a growing tendency to exchange information by 3D model rather than text or images. Through network platform to provide 3D dynamic display and lectotype service becomes the trend of the development gradually. So in this paper, a 3D dynamic display and interactive lectotype system was presents for mechanical design. This paper put forward a solution to exchange information by 3D model by integration of 3D CAD and Web3D techniques. Use the Viewpoint technique to displays interactive 3D models. Base on SolidWorks to exchange the 3D CAD model to Viewpoint model, and generation 2D and 3D commonly format files for downloading. Use database management system to manage all kinds of data. Proved by practice, this system can significantly increase conversion and improve the customer experience
Remanufacturing Cleaning Technology and its Application in Concrete Pump Truck
Authors: Duan Peng Hui , Yue Wen Hui , Zhu Yong Xing , Weng Jian Xin
Published: September 2013

Remanufacturing Cleaning is an important process during the remanufacturing engineering, which is unique and significantly different from the manufacturing process and has an important effect on ensuring the quality of remanufactured product. The cleanliness it achieved is an important quality index of remanufactured products, which directly affects the surface analysis, surface inspection, remanufacturing processing and assembly process and further affects the quality and cost of remanufactured products. First of all, this paper gives a systematic induction and summary on the cleaning techniques and methods of remanufacturing processes such as high-pressure water jet cleaning, ultrasonic cleaning and chemical cleaning. At the same time, the paper carries out a comparative analysis on merits and demerits of each cleaning technology. Secondly taking the remanufacturing cleaning of concrete pump truck for an example, this thesis emphasizes on introducing the cleaning techniques of pump truck vehicle cleaning and parts cleaning after dismantling, and then analysis the deficiencies of concrete pump truck cleaning from the perspective of resource and environment attribute. Finally, the paper gives development trend and prospect for the remanufacturing cleaning technology of concrete pump truck.
Hydraulic System Simulation of 3-UPS Parallel Mechanism Based on ADAMS/Hydraulics
Authors: Yan Bing Bing , Ren Wen Bo , Yin Bao Lin , Li Yang
Published: September 2013

In order to guaranty the work stability of the move-in-mud robot and movement relationship of wriggle turning joint, to use the 3-UPS parallel mechanism as the steering joint. Make full use of the characteristics flexibility, heavy force loading and small workspace of the parallel mechanism. Supporting link of the parallel mechanism driven by hydraulic cylinders, so a completely hydraulic system is an important factor to ensure the stationary work of parallel mechanism, provide the required power to go forward and ensure the forward speed of the move-in-mud robot. Establish the virtual prototype model of mechanical-hydraulic coupling system by using of Pro/E and ADAMS/Hydraulics software, do the dynamic simulation analysis of hydraulic control system based on Hydraulics module, the simulation process can be made more visual and vivid by three-dimensional visualization. Obtain the platform speed and hydraulic cylinder pressure curve after simulation, compare simulation results with theoretical calculations, and verify that the design is reasonable. The results show that it lays the foundation for the further optimization and research of the move-in-mud robot.
The Knowledge Innovation Mechanism and Model Simulation in Contemporary Integrated Manufacturing System
Authors: Zhong Bo Wen , Jin Zi Qi , Wang Xiao Hong , Jiang Hua
Published: September 2013

In this paper, a knowledge innovation model of contemporary integrated manufacturing system based on knowledge innovation theory and theory of creative thinking was proposed. Based on the interaction of innovation group knowledge and individual thinking, the basic idea of the model revealed the knowledge relation and cognitive development of multidisciplinary knowledge and creative thinking within modern integrated manufacturing system and explained knowledge innovation process of integrated manufacturing system for heterogeneous integration. The simulation results proved that the interdisciplinary knowledge innovation model of contemporary integrated manufacturing system better explains the internal mechanism of multidisciplinary knowledge innovation process. The simulation results are displayed by the pictures and validated by thepractices.