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  • 1
    Electronic Resource
    Electronic Resource
    Theoretical Research on Aerostatic Rectangular Guideways with Finite Difference Method (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 339 (May 2007), p. 371-376 
    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 load capacity and stiffness of the aerostatic rectangular guideways, which applyannular orifice restrictor and porous restrictor respectively, were analyzed with finite differencemethod in this paper. A program for solving the pressure distribution, load capacity and stiffness isprogrammed with VB. The calculated results show that the rise of supply pressure is good forimproving the load capacity and stiffness of guideways. The decrease of the orifice diameter inannular orifice restriction and the permeability in porous restriction is advantageous to improve thestiffness of guideways, but both the corresponding bearing clearance and load capacity decrease. Inboth the annular restriction and porous restriction, the best film thickness which make the stiffnessmaximum exists under the definite supply pressure and parameter of the restrictor. Under the samesupply pressure, the load capacity and stiffness of porous restriction is higher than the orificerestriction. Meanwhile, the design and manufacture of porous restrictor is simple. The porousrestrictor is the perfect restrictor of aerostatic guideways
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.339.371.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Simulation of Ceramic Injection Molding for Zirconia Optical Ferrule (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 997-1000 
    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: Zirconia Ferrule is a key part for manufacturing fiber connectors. The ceramic injectionmolding (CIM) process of the optical ferrule was simulated with the commercial CAE software moldflow.In order to obtain the optimum results, the orthogonal method was introduced to discuss the influence ofeach parameter such as die temperature, melt temperature, ram speed and gate dimension with the twokinds of distribution layout system respectively. The simulation results show that the curved distributionrunner system is more suitable than the rectangular distribution one in the optical ferrule molding.Moreover, the effect of gravity on the ceramic injection molding process was discussed for determining amore reasonable balanced runner system of the special designed two-plate mold with six die cavities. Itwas found that short shot occurred at the top of the die cavity while other five cavities were filled well inthe original designed mold. And when the top die cavity’s round runner with section diameter of 4.0mmwas increased to 4.17 mm, each cavity was balanced filled without short shot
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.997.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Microstructure of Brazing Joint of Silicon Nitride (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 4048-4052 
    Details
    ISSN: 1662-9752
    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: Si3N4 and 40CrMo steel was joined using Ag-Cu-Ti-Pd brazing filler. Microstructure ofthe joint and bonding interface was studied by SEM and EDS, and the phase structure was analyzedby XRD. The results indicate that reaction layers at ceramic/ filler alloy and filler alloy/steelinterfaces are formed. There is a reaction layer containing TiN and Ti5Si3 between ceramic and filleralloy, while the reaction layer between filler alloy and steel is composed of Fe-Ti compound. Themiddle part of the joint is an eutectic structure composed of Ag-riched and Cu-riched solid solutions.With the increase of the brazing temperature, the thickness of the joint seem decrease, the thickness ofthe reaction layer between Si3N4 and filler alloy increases and then decreases, and the thickness ofthe reaction layer between filler alloy and steel increases
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.4048.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Stereochemistry of the Spontaneous, Acid-Catalyzed and Base-Catalyzed Hydrolyses of Styrene Oxide (1994)
    s.l. : American Chemical Society
    The @journal of organic chemistry 59 (1994), S. 1638-1641 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00086a012
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  • 5
    Electronic Resource
    Electronic Resource
    A molecular dynamics model of the amorphous regions of polyethylene oxide (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 105 (1996), S. 1668-1681 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report a molecular dynamics model of the amorphous regions of polyethylene oxide for use in study of the ionic transport mechanisms in this polymer when it is used as an electrolyte in batteries. The model is produced by beginning with a molecular dynamics of dimethyl ether which we have reported earlier and "polymerizing'' it computationally by successively choosing pairs of unbonded methyl groups and changing the forces to describe the chemical bond in the polymer. This is not intended to be a fully realistic simulation of the actual chemical polymerization process, but we argue that it produces a useful model of a sample of the amorphous polymer. We report structural and dynamical properties of the resulting model, in which we have adopted torsion forces reported by Krimm and coworkers to fit the observed vibrational spectrum. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.472035
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  • 6
    Electronic Resource
    Electronic Resource
    A grazing incidence x-ray diffraction study of the transverse structure function of the liquid–vapor interface of Ga (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 4743-4749 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report the results of a grazing incidence x-ray diffraction study of the liquid–vapor interface of Ga. It is shown that the transverse structure function in the liquid–vapor interface of Ga is indistinguishable from the structure function of bulk liquid Ga. When compared with the transverse structure functions obtained from calculations of models of the liquid–vapor interface of a similar system [J. Chem. Phys. 86, 1036 (1987)], this result implies that the widely used point local density approximation to the properties of an inhomogeneous liquid is inaccurate and must be replaced by a representation which includes, at least to first order, the effect of the force which generates the density inhomogeneity in the liquid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.462785
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  • 7
    Electronic Resource
    Electronic Resource
    A HDRI Camera Based on SLM (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 364-366 (Dec. 2007), p. 1237-1241 
    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 high dynamic range image camera (HDRI) is a kind of camera which captures theHDRI image. HDRI means the image with high dynamic range, it can record the gray informationof the object with much wider dynamic range. HDR image has great applications in many fields.The existing HDRI camera needs either the special image sensor or can capture the still object only.In this paper, a new kind of camera is proposed. In this camera, a space light modulator (SLM) isused to acquire images with different exposure, then a HDRI is made with these images. Thiscamera can acquire dynamic image and it is cheap and easy to extend
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.364-366.1237.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Study on the Correlativity between Grinding Parameters and Surface Residual Stresses in Ceramic (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 375-376 (Mar. 2008), p. 480-484 
    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 generation and distribution of workpiece surface and sub-surface residual stress werepredicted through the dynamic finite element simulation of the grinding ceramic process. The base ofthe simulation is that the thermo elastic-plastic finite element theory and the coupling of grindingforces and temperature were adopted. The results obtained from X-ray diffraction measurementcompared well with the values calculated from theory. The correlation between grinding parametersand the ceramic residual stresses was investigated. The research results show that the normal grindingforce is the primary factor responsible for the generation of residual stress in grinding ceramic. Themechanical effect of the grains is to affect the magnitude, the depth of penetration and the gradient ofthe residual stresses
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.375-376.480.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Analysis and Simulation of Grinding Wheel Surface Topography (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 359-360 (Nov. 2007), p. 509-512 
    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 topography of the grinding wheel has a profound effect in analysis and predicting thefinished surface roughness. In this paper, the statistical analysis is applied to establish a distributionfunction of the grain protrusion heights, and the 3-D simulating topography of grinding wheel willbe identified. Through experiments, the generated grinding wheel topography is effective inpredicting the finished surface roughness
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.509.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Precision Grinding of Concave Spherical Surface of High-Alumina (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 726-728 
    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 performances of high-alumina ceramic are analyzed such as physical and mechanicalproperty. In consideration of its brittleness-ductility change, the critical cutting depth agc of high-aluminaceramic is 3μm. When the cutting depth of single grain is less than the critical cutting depth of aluminaceramic in precision manufacturing, the material is wiped off with ductility. So the cutting depth of singlegrain agm should be selected within 0.1~2.5μm.Grinding wheel sharp edge is utilized for the sphericalsurface generation cutting. The ceramic-bonded fine grain diamond wheel is selected after consideringmanufacturing technology, machining parameters, its making and mending. The granularity of grindingwheel is M1~M5 and the consistence is 125%. The method of spherical surface generation cutting and theeffect of high-alumina ceramic ductile machining were verified by the experiment of high-aluminaceramic precision grinding using precision grinding machine MGK1420. The result shows that thesurface quality is very high and achieves the requirements
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.726.pdf
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