• CO2 pipeline integrity: A coupled fluid-structure model using a reference equation of state for CO2 

      Aursand, Eskil; Aursand, Peder; Berstad, Torodd; Dørum, Cato; Hammer, Morten; Munkejord, Svend Tollak; Nordhagen, Håkon Ottar (Journal article; Peer reviewed, 2013)
      We present a coupled fluid-structure model to study crack propagation and crack arrest in pipelines. Numerical calculations of crack arrest, crack velocity and pressure profiles have been performed for steel pipes with an ...
    • CO2 pipeline integrity: A new evaluation methodology 

      Berstad, Torodd; Dørum, Cato; Jakobsen, Jana Poplsteinova; Kragset, Steinar; Li, Hailong; Lund, Halvor; Morin, Alexandre; Munkejord, Svend Tollak; Mølnvik, Mona Jacobsen; Nordhagen, Håkon Ottar; Østby, Erling (Journal article; Peer reviewed, 2011)
      A coupled fluid-structure model for pipeline integrity simulations has been developed. The pipe material and fracture propagation have been modelled using the finite-element method with a local fracture criterion. The ...
    • Effect of preheating and preplaced filler wire on microstructure and toughness in laser-arc hybrid welding of thick steel 

      Bunaziv, Ivan; Langelandsvik, Geir; Ren, Xiaobo; Westermann, Ida; Rørvik, Gisle; Dørum, Cato; Danielsen, Morten Høgseth; Eriksson, Magnus Carl Fredrik (Peer reviewed; Journal article, 2022)
      Acicular ferrite (AF) is the most important microstructural constituent to achieve high toughness at low temperatures in weld metal of steels. This is due to the relatively small grain size and large misorientation angles. ...
    • Finite element modelling of steel bridge structures exposed to ship collisions 

      Ofstad, Kevin Mandt (Master thesis, 2018)
      The behavior of the Bressan-Williams-Hill fracture criterion (BWH), which is often used in simulating ship collisions, was studied by modeling and studying existing experiments done on the subject. Three experiments are ...
    • Local and global responses of a floating bridge under ship-girder collisions 

      Sha, Yanyan; Amdahl, Jørgen; Dørum, Cato (Journal article; Peer reviewed, 2018)
      The Norwegian Public Roads Administration is running a project “Ferry Free Coastal Route E39” to replace existing ferry crossings by bridges across eight fjords in western Norway. Since most of the fjords are wide and deep, ...
    • Numerical and analytical studies of ship deckhouse impact with steel and RC bridge girders 

      Sha, Yanyan; Amdahl, Jørgen; Dørum, Cato (Peer reviewed; Journal article, 2021)
      Bridges crossing navigable waterways are under the threat of accidental collisions from passing ships. However, previous research focus was mainly placed on ship collision with bridge substructures while ship-bridge ...
    • Numerical Investigation of the Collision Damage and Residual Strength of a Floating Bridge Girder 

      Sha, Yanyan; Amdahl, Jørgen; Dørum, Cato; Yu, Zhaolong (Chapter, 2018)
      For bridges across wide and deep waterways, fixed foundation structures are not possible to be built due to technical restrictions. Alternatively, pontoon supported floating bridges which do not require fixed foundations ...
    • Simulation of shipping container impact with bridge girders 

      Sha, Yanyan; Liu, Zhenhui; Amdahl, Jørgen; Dørum, Cato (Chapter, 2020)
      One of the challenges in bridge design is to ensure bridge girder integrity under accidental collision loads induced by the superstructures of drifting ships. Such accidents can happen either during earthquakes or tsunami ...
    • Validation study of failure prediction in crash analysis 

      Reyes, Aase Gavina Roberg; Dørum, Cato; Hopperstad, Odd Sture; Langseth, Magnus; Lademo, Odd-Geir; Eriksson, Magnus (Chapter, 2008)
      Modeling of plastic deformation and failure is critical in crash analysis. In the present paper, we have studied one approach to represent instabilities and damage evolution in non-linear finite element analyses of forming ...