• An experimental study of static and dynamic behaviour of bolted end-plate joints of steel 

      Grimsmo, Erik Løhre; Clausen, Arild Holm; Langseth, Magnus; Aalberg, Arne (Journal article; Peer reviewed, 2015)
      Many actions, such as accidental or malicious explosions, may impose high loading rates to structural frames. To enhance the knowledge of the behaviour of joints subjected to severe impulsive loading, a double-sided ...
    • Ballistic impact of layered and case-hardened steel plates 

      Holmen, Jens Kristian; Solberg, Jan Ketil; Hopperstad, Odd Sture; Børvik, Tore (Journal article; Peer reviewed, 2017)
      We investigated the ballistic resistance of hot-rolled structural steel plates with a nominal yield stress of 355 MPa in this study. Ballistic tests were conducted with 7.62mm armor piercing bullets on monolithic and ...
    • Behaviour of Al-Mg-Si alloys at a wide range of temperatures and strain rates 

      Vilamosa, Vincent; Clausen, Arild Holm; Børvik, Tore; Skjervold, SR; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2015)
      The thermo-mechanical behaviour in tension of three as-cast and homogenized Al-Mg-Si alloys, distinguished by their Mg and Si content, was investigated at a wide range of strains (the entire deformation process up to ...
    • Effect of heat-treatment on the structural response of blast-loaded aluminium plates with pre-cut slits 

      Granum, Henrik; Aune, Vegard; Børvik, Tore; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2019)
      This study investigates the structural response of blast-loaded aluminium plates with pre-cut slits. The 1.5 mm thick plates were tested after three different heat-treatments and with four different pre-cut slit geometries ...
    • Effects of heat treatment on the ballistic properties of AA6070 aluminium alloy 

      Holmen, Jens Kristian; Johnsen, Joakim; Jupp, S; Hopperstad, Odd Sture; Børvik, Tore (Journal article; Peer reviewed, 2013)
      The ballistic properties of the aluminium alloy AA6070 in different tempers are studied, using target plates of 20 mm thickness in tempers O (annealed), T4 (naturally aged), T6 (peak strength) and T7 (overaged). The ...
    • Experimental study on the response of thin aluminium and steel plates subjected to airblast loading 

      Aune, Vegard; Fagerholt, Egil; Hauge, Kristoffer Olsen; Langseth, Magnus; Børvik, Tore (Journal article; Peer reviewed, 2016)
      This work presents results from an experimental investigation on the influence of stand-off distance on the dynamic response of thin ductile plates subjected to airblast loading. The square plates had an exposed area of ...
    • Fracture and fragmentation of blast-loaded laminated glass: An experimental and numerical study 

      Osnes, Karoline; Holmen, Jens Kristian; Hopperstad, Odd Sture; Børvik, Tore (Journal article; Peer reviewed, 2019)
      In this study, we use the explicit finite element method in combination with higher order elements and 3D node splitting to simulate fracture and fragmentation of blast-loaded laminated glass. Node splitting is a modelling ...
    • Impact against empty and water-filled X65 steel pipes - Experiments and simulations 

      Kristoffersen, Martin; Casadei, Folco; Børvik, Tore; Langseth, Magnus; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2014)
      Offshore pipelines are frequently subjected to accidental impact loads, e.g. from anchors or trawl gear. A lot of parameters – including the pipe geometry, material properties, pipeline content, impact velocity, etc. – ...
    • Influence of yield-surface shape in simulation of ballistic impact 

      Holmen, Jens Kristian; Hopperstad, Odd Sture; Børvik, Tore (Journal article; Peer reviewed, 2017)
      A high-exponent yield criterion is applied in 3D nonlinear finite element simulations of ballistic impact. The computational models are based on a comprehensive experimental study including material tests of 12 mm thick ...
    • Low velocity impact on crash components with steel skins and polymer foam cores 

      Reyes, Aase; Børvik, Tore (Journal article; Peer reviewed, 2019)
      Energy absorbing systems are extensively used in the automotive industry to ensure crashworthiness. Such crash components could typically consist of a sandwich structure with thin ductile plates as skins and a cellular ...
    • Low-velocity impact on high-strength steel sheets: An experimental and numerical study 

      Gruben, Gaute; Langseth, Magnus; Fagerholt, Egil; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2016)
      Low-velocity impact tests were performed on dual-phase and martensitic steel sheets and compared with corresponding quasi-static tests. The geometry and loading condition of the specimens were similar to formability tests, ...
    • Low-velocity impact on multi-layered dual-phase steel plates 

      Holmen, Jens Kristian; Hopperstad, Odd Sture; Børvik, Tore (Journal article; Peer reviewed, 2015)
      In this paper an experimental program investigating the behavior of monolithic and multi-layered configurations of 0.8 mm and 1.8 mm medium-strength steel plates is presented. We have considered impacts by blunt-ended and ...
    • Modeling of material failure in foam-based components 

      Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Hanssen, Arve Grønsund; Langseth, Magnus (Journal article; Peer reviewed, 2004)
      The modeling of material failure in foam-filled beams was explored through numerical analyses with LS-DYNA. The study was based on previous physical tests on bending of square aluminum extrusions filled with aluminum foam. ...
    • Numerical study on the structural response of blast-loaded thin aluminium and steel plates 

      Aune, Vegard; Valsamos, Georgios; Casadei, Folco; Larcher, Martin; Langseth, Magnus; Børvik, Tore (Journal article; Peer reviewed, 2016)
      The inelastic response of thin aluminium and steel plates subjected to airblast loading is studied numerically and validated against experimental data. Special focus is placed on the influence of elastic effects and negative ...
    • On the ballistic perforation resistance of additive manufactured AlSi10Mg aluminium plates 

      Kristoffersen, Martin; Costas, Miguel; Koenis, Tim; Brøtan, Vegard; Paulsen, Christian Oen; Børvik, Tore (Journal article; Peer reviewed, 2019)
      Materials and structures made through additive manufacturing (AM) have received a lot of attention lately due to their flexibility and ability to customize structural components of complex geometry. One range of application ...
    • On the dynamic response of adhesively bonded structures 

      Lissner, Maria; Alabort, Enrique; Erice, Borja; Cui, Hao; Blackman, Bamber R. K.; Petrinic, Nik (Peer reviewed; Journal article, 2020)
      Fracture mechanics experiments are used to investigate the rate-dependent failure of adhesively bonded structures under different deformation modes: I, II and I/II. First, the high-rate mechanical response of the adhesive ...
    • On the dynamic response of blast-loaded steel plates with and without pre-formed holes 

      Aune, Vegard; Valsamos, Georgios; Casadei, Folco; Langseth, Magnus; Børvik, Tore (Journal article; Peer reviewed, 2017)
      The dynamic response of blast-loaded steel plates is studied both experimentally and numerically. The blast loading was generated using a shock tube facility. This is an alternative to explosive detonations where the blast ...
    • Penetration of granular materials by small-arms bullets 

      Børvik, Tore; Dey, Sumita; Olovsson, L (Journal article; Peer reviewed, 2015)
      This paper presents an experimental and numerical study on the penetration of granular materials by small-arms bullets. In the experimental tests, five different types of granular material (0–2 mm wet sand, 0–2 mm dry sand, ...
    • Perforation of welded aluminum components: Microstructure-based modeling and experimental validation 

      Holmen, Jens Kristian; Børvik, Tore; Myhr, Ole Runar; Fjær, Hallvard Gustav; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2015)
      Perforation of welded aluminum structures by small-arms bullets is studied both experimentally and numerically in this paper. From the chemical composition, artificial aging history, and welding procedure, the spatial ...
    • Square aluminum tubes subjected to oblique loading 

      Reyes, Aase Gavina Roberg; Langseth, Magnus; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2003)
      The behavior and energy-absorbing capability of obliquely loaded square thin-walled aluminum columns in alloy AA6060 were studied through quasi-static experiments and FEM-analyses with LS-DYNA. The specimens were clamped ...