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  • 3-D city model  (1)
  • Collinear cracks  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of Two Collinear Cracks in a Piezoelectric Layer Bonded to Two Half Spaces Subjected to Anti-plane Shear (2000)
    Springer
    Meccanica 35 (2000), S. 443-456 
    Details
    ISSN: 1572-9648
    Keywords: Piezoelectric materials ; Triple integral equations ; Fourier transform ; Collinear cracks ; Mechanics of fracture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract In this paper, the behavior of two collinear anti-plane shear cracks in a piezoelectric layer bonded to two half spaces is investigated by a new method for the impermeable crack face conditions. The cracks are parallel to the interfaces in the mid-plane of the piezoelectric layer. By using the Fourier transform, the problem can be solved with two pairs of triple integral equations. These equations are solved using the Schmidt method. This process is quite different from that adopted previously. Numerical examples are provided to show the effect of the geometry of the interacting cracks and the piezoelectric constants of the material upon the stress intensity factor of the cracks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010351615603
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  • 2
    Electronic Resource
    Electronic Resource
    Expression and Visualization of Cloverleaf Junction in a 3-Dimensional City Model (2000)
    Springer
    Geoinformatica 4 (2000), S. 375-386 
    Details
    ISSN: 1573-7624
    Keywords: 3-D city model ; triangulated irregular network (TIN) ; cloverleaf junction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
    Notes: Abstract Seldom research work has been conducted on cloverleaf junction expression in a 3-dimensional city model (3DCM). One apparent reason is that the cloverleaf junction is often in a complex and enormous construction. Its main body is bestraddle in air, and has aerial intersections between its parts. This complex feature makes cloverleaf junctions quite different from buildings and terrain, it is therefore difficult to express this kind of spatial objects in the same way as for buildings and terrain. In this paper, authors analyzed spatial characteristics of cloverleaf junction, proposed an all-constraint points triangulated irregular network (TIN) algorithm to partition cloverleaf junction road surface, and developed a method to visualize cloverleaf junction road surface using TIN. Accordingly, an appropriate data structure for cloverleaf junction is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026513912425
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