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Träfflista för sökning "WFRF:(Johansson Kenneth) ;lar1:(cth)"

Sökning: WFRF:(Johansson Kenneth) > Chalmers tekniska högskola

  • Resultat 1-10 av 54
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1.
  • Ebenhag, Sven-Christian, 1976, et al. (författare)
  • Time transfer using an asynchronous computer network: Results from three weeks of measurements
  • 2007
  • Ingår i: European Frequency and Time Forum, 29/5 - 1/6, Geneva, CH.
  • Konferensbidrag (refereegranskat)abstract
    • We have performed a time transfer experimentbetween two atomic clocks, over a distance of approximately 75km using an 10 Gbit/s asynchronous fiber-optic computernetwork. The time transfer was accomplished through passivelistening on existing data traffic and a pilot sequence in the SDHbit stream. In order to assess the fiber-link clock comparison, wesimultaneously compared the clocks using a GPS carrier phaselink. The standard deviation of the difference between the twotime transfer links over the three-week time period was 243 ps.
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  • Hedekvist, Per Olof E, 1967, et al. (författare)
  • Accurate time transfer utilizing the synchronization in an SDH-network
  • 2006
  • Ingår i: 2006 Optical Fiber Communication Conference, and the 2006 National Fiber Optic Engineers Conference; Anaheim, CA; United States; 5 March 2006 through 10 March 2006. - 9781557528032
  • Konferensbidrag (refereegranskat)abstract
    • A nationwide system for accurate time distribution is being developed, utilizing synchronization in an SDH-network. The first experimental results based on this technique are presented, performed on, but not limited to, STM-64.
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  • Johansson, Göran, 1975, et al. (författare)
  • Computational modeling of inelastic large ratcheting strains
  • 2005
  • Ingår i: International Journal of Plasticity. ; 21:5, s. 955-980
  • Tidskriftsartikel (refereegranskat)abstract
    • A framework forphenomenological hyperelasto-plasticity with initial anisotropy,kinematic hardening as well as anisotropic damage is presented inMenzel et al. (2003a).In this contribution we exploit and extend this framework toinclude several back-stresses in order to capture the ratchettingresponse of polycrystalline metals subjected to cyclic stress withnon-zero mid-value. The evolution equations for kinematichardening resemble a linear combination of the multiple-Armstrong-Frederic and the Burlet-Cailletaudmodels, which are extended to the large strain setting. Thecapability of the model to capture various phenomenologicalcharacteristics, in particular multi-axial ratchetting, isillustrated by numerical examples. Comparisons with uni-axial andbi-axial experimental ratchetting results for carbon steel aregiven. Finally, the finite element analysis of a simplifiedrailway turnout component subjected to cyclic loading ispresented.
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  • Johansson, Göran, 1975, et al. (författare)
  • Modeling of anisotropic inelasticity in pearlitic steel at large strains due to deformation induced substructure evolution
  • 2005
  • Ingår i: European Journal of Mechanics - A/Solids. ; 24:6, s. 899-1088
  • Tidskriftsartikel (refereegranskat)abstract
    • A macroscopic model for deformation induced anisotropy due to substructure evolution at large strains in pearlitic steel is proposed within a thermodynamically consistent framework. The model is motivated via experimental observations, e.g., [Ivanisenko, Y., Lojkowski, W., Valiev, R.Z., Fecht, H.-J., 2003. The mechanism of formation of nanostructure and dissolution of cementite in a pearlitic steel during high pressure. Acta Mater. 51, 55555570]. Although each pearlitic grain has a preferred direction determined by cementite lamellas, initial random orientation of the grains is interpreted as initial macroscopic isotropy. However, the oriented grains tend to align after large shear deformation. The proposed model for evolution of orientation and stiffness is inspired by recent developments in bio-mechanics, e.g., [Imatani, S., Maugin, G.A., 2002. A constitutive model for material growth and its application to three-dimensional finite element analysis. Mech. Res. Commun. 29, 477483; Menzel, A., 2004. Modelling of anisotropic growth in biological tissues. Biomech. Model. Mechanobiol. 3, 147171]. One important application is large irreversible shear deformations in the surface layer of railway track components.
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  • Resultat 1-10 av 54
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konferensbidrag (37)
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övrigt vetenskapligt/konstnärligt (28)
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Runesson, Kenneth, 1 ... (44)
Johansson, Håkan, 19 ... (37)
Larsson, Fredrik, 19 ... (25)
Johansson, Jan, 1960 (6)
Ekh, Magnus, 1969 (4)
Ebenhag, Sven-Christ ... (4)
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Hedekvist, Per Olof ... (4)
Haas, Rüdiger, 1966 (2)
Johansson, Magnus, 1 ... (2)
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Kling, Teresia, 1985 (1)
Sánchez, José, 1979 (1)
Nelander, Sven, 1974 (1)
Chanock, Stephen J (1)
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Johansson, Mats, 195 ... (1)
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Göteborgs universitet (2)
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