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Träfflista för sökning "LAR1:ltu srt2:(1980-1989)"

Sökning: LAR1:ltu > (1980-1989)

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81.
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82.
  • Andersson, Börje, et al. (författare)
  • Thermal stresses in large butt-welded plates
  • 1981
  • Ingår i: Journal of thermal stresses. - : Informa UK Limited. - 0149-5739 .- 1521-074X. ; 4:3-4, s. 491-500
  • Tidskriftsartikel (refereegranskat)abstract
    • In shipyard panel-production lines several rectangular plates ae butt welded to form large panels. One problem is the tendency of hot cracking in the end portion of the butt weld. In this paper transient temperature fields and stress fields in butt-welded plates are calculated using the finite-element method. The calculations are performed for different welding speeds, for different heat inputs, and for one-sided and two-sided welding.
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83.
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84.
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85.
  • Andersson, G. (författare)
  • Creep experiments on powder
  • 1983
  • Ingår i: Scandinavian journal of metallurgy. - 0371-0459 .- 1600-0692. ; 12:6, s. 312-314
  • Tidskriftsartikel (refereegranskat)abstract
    • The change in strain during constant loading in die, isostatic and triaxial compaction has been studied for tungsten carbide powder. The creep effect change is largest for isostatic loose powder compaction whereas the slightly precompacted specimens (20 MPa) show less strain change. The creep effect gives modest contributions to the total strain for reasonable times. The highest pressure at which the effect has been recorded is 200 MPa.
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86.
  • Andersson, L.C., et al. (författare)
  • Lineament mapping in Northern Sweden from Landsat images using orthogonal image transforms
  • 1980
  • Ingår i: Sixth Annual Symposium Machine Processing of Remotely Sensed Data and Soil Information Systems and Remote Sensing and Soil Survey, June 3 - 6, 1980, Purdue Univ., Laboratory for Applications of Remote Sensing, West Lafayette, Ind. - New York : IEEE Communications Society. ; , s. 147-157
  • Konferensbidrag (refereegranskat)abstract
    • The emphasis of this paper is put on mapping of geological linear structures, and in particular the correlation between these structures orientation and geological or geophysical data. It is also the intention of the authors to present a method to map these structures more objectively than up to now
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87.
  • Andersson, L.C., et al. (författare)
  • Lineaments analysis using global and local Fourier transforms
  • 1983
  • Ingår i: Proceedings of the fourth international conference on basement tectonics, Oslo, Norway, August 10-14, 1981. - Salt Lake City : International Basement Tectonics Association. - 0916347001 ; , s. 63-69
  • Konferensbidrag (refereegranskat)
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88.
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89.
  • Andersson, L-E, et al. (författare)
  • Some fundamental transmission properties of impedance transitions
  • 1984
  • Ingår i: Wave motion. - : Elsevier BV. - 0165-2125 .- 1878-433X. ; 6:4, s. 389-406
  • Tidskriftsartikel (refereegranskat)abstract
    • Reflection and transmission of waves by impedance transitions from a constant input to a constant output characteristic impedence are considered. Several fundamental properties are explored, primarily for impedance transitions with piece-wise constant characteristic impedance in an arbitrary number N of intervals of equal length. For example, the following properties are shown: (i) The relative momentum transmission depends only on the ratio of output to input characteristic impedance. (ii) For a given impedance transition there are at most, and generally exactly, 2N different transitions, including the original one, with identical transmission properties. (iii) For monotoneous impedance transitions the efficiency of energy transmission is minimized by one with an abrupt change in characteristic impedance. (iv) There exists an optimal impedance transition, with a certain antisymmetry, which maximizes the efficiency of energy transmission for a given incident wave of finite duration and energy. Several of the results can be extended to more general classes of impedence transitions. Simple illustrative examples are given.
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90.
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