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  • Springer  (3)
  • Hindawi
  • Molecular Diversity Preservation International
  • 1990-1994  (3)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    The effect of the sheet rigidity on strength of the spot weld tension shear joint (1990)
    Springer
    Acta mechanica solida Sinica 3 (1990), S. 403-416 
    Details
    ISSN: 0894-9166
    Keywords: spot welded joint ; stress intensity factor ; fatigue life ; tension test ; fatigue test ; finite element method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract This paper presents some test and analysis results for a spot welded joint subjected to tensile and alternate load. The effect of sheet rigidity on the tensile strength and fatigue life of the spot welded joint is studied by using the stress intensity factorsK I,K II,K III and an “effective stress intensity factor” Kϕθmax calculated by the finite element method for crack around the nugget. The results show that the “effective stress intensity factor” Kϕθmax is an essential parameter for estimating the fatigue life of the spot welded joint.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02284772
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Orientation-based unique representation for planar curves and shapes (1992)
    Springer
    The visual computer 8 (1992), S. 191-199 
    Details
    ISSN: 1432-2315
    Keywords: Planar shape representation ; Graphics ; Pattern recognition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract This paper presents an orientation-based representation for planar curves and shapes. The new representation can uniquely represent all types, of planar shapes, be it convex, nonconvex, polygonal, smoothly curved, or piecewise smooth shapes. It is based on a new parameterization, theabsolute integral orientation. This representation is invariant under translation and rotation. The absolute integral orientation is a parameter invariant under scaling. As a result, matching of similar shapes (i.e., determination of the relative orientation and the scaling factor) using the absolute integral orientation as the parameter is easier than using the arclength as the parameter. In addition, the new representation has the feature of adaptive sampling, making it more compact and efficient than arc-length-based representations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01902139
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation and immobilization of polymer-protected bimetallic colloids (1991)
    Springer
    Polymer bulletin 25 (1991), S. 139-144 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Co-reduction of mixed metal ions of platinum-rhodium or rhodium-gold by refluxing its alcohol ic solution in presence of a protective polymer results in a corresponding stable bimetallic sol, which in turn interacts with a suspension of silica gel, bearing thioether ligand, to give supported bimetallic catalysts. The TEM and XRD measurements indicate the formation of the bimetallic alloy clusters. The sols are used as catalysts for the selective partial hydrogenation of cis, cis-1.5-cyclooctadiene to cyclooctene. The bimetallic sol catalyst PVP-Pt-Rh shows an activity which is about twice as that of the monometallic sol PVP-Rh.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00338911
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    Paper (German National Licenses)
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