Blar i Institutt for konstruksjonsteknikk på forfatter "Okstad, Knut Morten"

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    • A comparative study of beam element formulations for nonlinear analysis: corotatinal vs. geometrically exact formulations 

      Mathisen, Kjell Magne; Bazilevs, Yuri; Haugen, Bjørn; Helgedagsrud, Tore Andreas; Kvamsdal, Trond; Okstad, Knut Morten; Raknes, Siv Bente (Chapter, 2017)
      In this work the geometrically exact three-dimensional beam theory has been used as basis for development of a family of isoparametric higher order large deformation curved beam elements. Geometrically exact three-dimensional ...

    • Implementation of isogeometric thin shell analysis within an object oriented computing environment 

      Haave, Simen Skogholt; Rakvåg, Marit (Master thesis, 2018)
      The drawback in today's computational analysis in structural engineering is that design and analysis are not integrated in a unified platform. A majority of the time spent in structural analysis is used to transform a ...

    • Isogeometric analysis of finite deformation nearly incompressible solids 

      Mathisen, Kjell Magne; Okstad, Knut Morten; Kvamsdal, Trond; Raknes, Siv Bente (Peer reviewed; Journal article, 2011)
      This paper addresses the use of isogeometric analysis to solve finite deformationsolid mechanics problems, in which volumetric locking may be encountered. The current workis based on the foundation developed in the project ...

    • Isogeometric methods for CFD and FSI-simulation of flow around turbine blades 

      van Opstal, Timo Matteo; Fonn, Eivind; Holdahl, Runar; Kvamsdal, Trond; Kvarving, Arne Morten; Mathisen, Kjell Magne; Nordanger, Knut; Okstad, Knut Morten; Rasheed, Adil; Tabib, Mandar (Journal article; Peer reviewed, 2015)
      Coupled fluid-structure interaction simulations of wind turbines have traditionally been considered computationally too expensive to carry out. However, more powerful computers and better solution techniques based on ...