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  • 2005-2009  (22)
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Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Dynamic Characteristics and Mode Selection of High Tower (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 33-37 (Mar. 2008), p. 1201-1206 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The dynamic characteristics of a TV tower with 610m in height is actively analyzed byusing commercial package ANSYS in this study. The mode selection is carried out by determining themodal mass participation ratio. The observations made based on numerical investigation demonstratethat the natural frequencies of the high rise unsymmetrical tower are substantially close and the modaldisplacement of the antenna is much larger than that of the major tower. In order to select the majormode shapes, the modal mass participation ratios of the first 30 modes are calculated and at least first10 mode shapes should be considered when investigating the seismic responses. It is seen that themode shapes whose vibration directions are paralleled to the short axis of the elliptical core tube arecritical to the structural seismic responses. In this direction, the mass participation ratios of the firstthree mode shapes add up to 0.63, the 10 modes, the sum of whose modal participation ratio is 0.8184,are selected in order. Therefore, at least 10 modes should be involved in the analysis of structuralseismic responses
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.1201.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Numerical Simulation of Liquid-Solid Two-Phase Flows on Internal and Outside Flow Field in High Pressure Abrasive Water Jet Cutting Nozzle (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 392-394 (Oct. 2008), p. 565-569 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Based on premixed high pressure water jet cutting, five kinds of nozzle models wereestablished, and the control equations and closed equtions of liquid-solid two-phase were given. Theinside-outside liquid-solid two-phase flow characteristics of the nozzles were simulated by HybridFinite Analytic Method (HFAM). The results indicate that the taper-beeline nozzle has betterconvergence characteristic, good hydraulic characteristic and lower radical velocity, thus it is moresuitable for premixed high pressure water jet cutting nozzle
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.392-394.565.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Intelligent Monitoring Technique for Working Status of Shenzhen Citizen Center Roof Truss Structure under Wind Load (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 33-37 (Mar. 2008), p. 1141-1148 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Taken the roof of Shenzhen citizen center with huge size and very complicated structureas the engineering background, the intelligent methods of safety monitoring of integer behavior forlarge span complex space truss structures under wind-excited by the data-acquisition based onlimited sensors are discussed in detail in this paper. In order to acquire the working status of thewhole structure, the method that can be adopted to obtain structural real-time response under windload is listed as follows, step1: to identify the wind load; step 2: to update the structural finiteelement model; step 3: to measure peak factor of structural response; step 4: to directly analyze thestructural real timely response. The first two steps are key techniques among all the steps of themethod.The weighted proper orthogonal decomposition technique is adopted to identify the characteristicsof wind pressures at all internal nodes on the truss structural roof in the frequency domain by usingthe measured wind pressure data from non-uniformly taps. Moreover, by using measured structuralacceleration response from finite acceleration sensors on the structure, the accurate analytical modelof the structure is established by updating the finite element model based on modifying nodeparameters. Then, the monitoring result of entire truss structure in the worst working performancein every ten minutes is obtained according to positive deductive method with the measured meanwind speed and wind direction from anemometer and peak factor acquired from finite strain gaugeson the truss structure in every 10 minutes. Finally, based on the above-mentioned method, workingstatus intelligent monitoring system is established, which can display the stress level and safe classof all structural members
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.1141.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Preparation and Photocatalytic Property of WO〈sub〉3〈/sub〉-TiO〈sub〉2〈/sub〉 /Ti Ceramic Film via Anodic Oxidation Treatment (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 1500-1502 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The high efficient WO3-TiO2/Ti ceramic film was prepared on the surface of titanium by theapproach of anodic oxidation in order to make the absorbable spectrum of catalyst spread to the visibleregion and restrain the high recombination rate of electron-hole pairs during photoreaction. The surfacemorphology and the distribution of elements were studied with scanning electron microscopy and energydispersive spectroscopy. The phase composition of the films was investigated with XRD. The resultsshowed that the main components in the coating were WO3, rutile TiO2 and anatase TiO2. The compoundWO3-TiO2/Ti ceramic film enlarged the range of the reacting visible light and increased the absorbingintensity. The rhodamine B was successfully photodegraded under visible light irradiation byWO3-TiO2/Ti catalyst films. It was found that the highest degradation rate of rhodamine B was achievedthrough an optimal W dosage of 4.2 %(wt %) in WO3-TiO2/Ti ceramic film. It was also confirmed that therecombination rate of electron-hole pairs in WO3-TiO2/Ti ceramic film declined due to the existence ofWO3 in TiO2/Ti ceramic film
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1500.pdf
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Elastic-Plastic Torque Analysis of Notched Cross-Section Bars Using the Finite Difference Method (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 385-387 (July 2008), p. 869-872 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A new strategy of finite differences method is proposed for analysis of notchedcross-section bars under elastic-plastic torsion. Relation curves of the elastic-plastic torqueresponding with different positions, angles and lengths of the notches in one section are obtained bynumerical tests. It can be seen that these relation curves exhibit obvious nonlinearity. Meanwhile,the stress intensity factors can also be easily calculated by utilizing the results of above finitedifferences method. It provides an effective way for solving such elastic-plastic fracture mechanicsproblem
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.385-387.869.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Finite Element Modelling and Analysis of Cutting-Direction Burr Formation (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 392-394 (Oct. 2008), p. 88-92 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: To prevent or reduce the formation of burr efficiently in metal cutting, it is necessary toreveal the burr formation mechanism. A finite element model of cutting-direction burr formation inorthogonal machining was presented in this paper. The simulation of the burr formation process wasconducted. Undeformed chip thickness, rake angle, rounded cutting edge radius and workpiecematerial were included in cutting conditions, whose influences on burr formation were investigated,according to the simulation results. By comparing the results of the simulation and the experiment,good consistency is achieved which proves that the finite element model of burr formation in thispaper is significant and effective to predict burr formation
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.392-394.88.pdf
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Finite Element Analysis of the Effects of Coated Tool on High Speed Orthogonal Machining (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 392-394 (Oct. 2008), p. 879-883 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Two 3-D finite element models of coated tool and uncoated tool were established usingthe finite element code DEFORM-2D based on the updated Lagrangian formula. And theirmachinability on high speed orthogonal machining was simulated and compared. The investigationresults indicate that the coated tool has higher surface temperature and lower inside temperaturecompared with the uncoated tool. Moreover, the cutting forces of the model using coated tool arelower than that using uncoated tool
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.392-394.879.pdf
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Light-Induced Functional VO〈sub〉2〈/sub〉 Films (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 47-50 (June 2008), p. 532-535 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Ultrafast optical pump-probe technique employed in a degenerate-four-wave-mixingconfiguration was used to study the light-induced optical property change during extremely shorttime period of femtoseconds (fs) to picoseconds (ps) for VO2 thin films. Dramatic change in opticalproperties serves as basis of light-induced functional materials in ultrafast applications. Upon lightillumination the structural change was identified as a phase transition (PT) from insulator tometallic phases. After the light-induced PT a fast recovery process occurred, which was stronglydependent on optical pump energy. It could be governed by pure electronic relaxation excludingthermal contribution at sufficiently low excitation. The insulator and metallic phases are coexistentexhibiting fluctuations of dielectric constants. Different desorption activity was monitored forinsulator and metallic VO2 thin solid films under femtosecond optical excitation
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.532.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Low Temperature Explosion for Nanometer Active Materials (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 193-196 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This paper describes a new method for prediction of the Chapman–Jouguet detonationparameters of CaHbNcOdLieMnf explosives for mixture of some of low temperature explosionexplosives at [removed info]0 = 1000 kg/m3. Explosion temperatures of water-gel explosives and explosiveformulations are predicted using thermochemistry information. The methodology assumes that theheat of detonation of an explosive compound of products compositionH2O–CO2–CO–Li2O–MnO2–Mn2O3 can be approximated as the difference between the heats offormation of the detonation products and that of the explosive, divided by the formula weight of theexplosive. For the calculations in which the first set of decomposition products is assumed,predicted temperatures of explosion of water-gel explosives with the product H2O in the gas phasehave a deviation of 153.29 K from results with the product H2O in the liquid state. Lithium andmanganese oxides have been prepared by the explosion of water-gel explosives of the metal nitrates,M (NO3) x (M = Li, Mn) as oxidizers and glycol as fuels, at relative low temperature. We have alsoused the Dulong-Petit’s values of the specific heat for liquid phase H2O. Lithium manganese oxidepowders with chrysanthemum-like morphology secondary particles, but with smaller primaryparticles of diameters from 5 to 30 nm and a variety of morphologies were found. The oxidesproduced by this cheap method affirmed the validity of explosion synthesis of nano-size materialsfor lithium ion batteries
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.193.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Preparation and Characterization of Porous β-TCP/PLLA Composites with High β-TCP Content (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 330-332 (Feb. 2007), p. 491-494 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Porous β-tricalcium phosphate (β-TCP)/ Poly L-lactic acid (PLLA) composites wereprepared by thermally induced phase separation method. The results showed that the composite hadan interconnected pore structure with ～200μm macropores. The inorganic particle content in thecomposites varied from 50% to 80% and these particles were homogeneously dispersed in PLLAmatrix. The composites obtained in this study could act as a promising scaffold for bone tissueengineering because of the pore structure and the mechanical properties
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.491.pdf
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