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    • Aluminum structures exposed to blast loading 

      Hustad, Tore Andre; Lindland, Andreas Lyngtveit (Master thesis, 2014)
      Design of blast resistance in structures is an important aspect in modern society. Plated structures are used in a lot of constructions that can be especially vulnerable to explosions. This includes e.g. protective, offshore ...
    • A Multi-Scale Approach for Modelling of Fracture in Aluminium Alloys under Impact Loading 

      Valle, Heidi; Frodal, Bjørn Håkon (Master thesis, 2015)
      The main objective of this thesis was to investigate the ballistic properties of an isotropic AlMgSi aluminium alloy both experimentally and numerically. Uncoupled and coupled fracture models were calibrated using ...
    • An experimental-numerical method to determine the work-hardening of anisotropic ductile materials at large strains 

      Khadyko, Mikhail; Dumoulin, Stephane; Børvik, Tore; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2014)
      The determination of work-hardening for ductile materials at large strains is difficult to perform in the framework of usual tensile tests because of the geometrical instability and necking in the specimen at relatively ...
    • A shock tube facility to generate blast loading on structures 

      Aune, Vegard; Fagerholt, Egil; Langseth, Magnus; Børvik, Tore (Journal article; Peer reviewed, 2016)
      This study evaluates the performance of a new shock tube facility used to produce blast loading in controlled laboratory environments. The facility was found to generate a planar shock wave over the tube cross section by ...
    • 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 ...
    • Ballistic Penetration and Perforation of Steel Plates 

      Børvik, Tore (Dr. ingeniøravhandling, 0809-103X; 2000:124, Doctoral thesis, 2001)
      Situations involving impact, i.e. the collision between two or more solids, were at one time primarily of concern to the military. Nowadays, as safety is highlighted within most branches of industry, the field of impact ...
    • Ballistic Perforation of Surface Hardened Mild Steel Plates 

      Thorsen, Henrik; Orthe, Erlend (Master thesis, 2014)
      The main objective with this thesis was to investigate experimentally and numerically the effect surface hardening has on the ballistic properties of monolithic and laminated mild steel plates. 300x300 mm^2 plates of ...
    • Behaviour and Modelling of Flexible Structures Subjected to Blast Loading 

      Aune, Vegard (Doctoral theses at NTNU;2017:101, Doctoral thesis, 2017)
      The last two decades have seen a significant increase in the research activity on blast-loaded structures. This is to a large extent related to the increased threat of deliberate use of high explosives against civilian ...
    • Behaviour of plated structures subjected to blast loading 

      Aune, Vegard; Børvik, Tore; Langseth, Magnus (Journal article; Peer reviewed, 2015)
      An experimental investigation using a new shock tube facility to study blast-load effects on thin aluminium plates is presented. The shock tube is designed to expose materials and structures to extreme loading conditions, ...
    • Bending of X65 Offshore Steel Pipes 

      Lofthaug, Kristoffer; Digerud, Erik (Master thesis, 2014)
      This thesis is part of an ongoing research program between SIMLab and Statoil about impact loads on X65 offshore pipelines and it is a continuation of previous work.Offshore pipelines are frequently impacted by accidental ...
    • Blast Loaded Aluminium Plates: Experiments and numerical simulations 

      Melby, Emil Arne; Eide, Hilde Olaug Stakvik (Master thesis, 2013)
      Light and flexible protective constructions in aluminium could be subjected to a blast load. In this thesis the effect of blast loading on aluminium plates of the type 1050A ? H14 was studied through experiments and numerical ...
    • Deformasjon av trykksatte rørledninger 

      Jakobsen, Espen (Master thesis, 2013)
      Offshore pipelines may be subjected to impact by anchor and trawl gear. An anchor impact will drag the pipeline out of its position, before it is released and the pipe straightens, due to the rebound and large axialforces. ...
    • Denting of coated and uncoated offshore steel pipes 

      Holm, Nicolay Line; Røshol, Eivind Torgunrud (Master thesis, 2015)
      In the present thesis, numerical and experimental investigations of coated offshore pipelines were conducted. The objective was to investigate how the polypropylene coating affected the global response of the pipes. The ...
    • Discrete modeling of low-velocity penetration in sand 

      Holmen, Jens Kristian; Olovsson, Lars; Børvik, Tore (Journal article; Peer reviewed, 2017)
      In this paper, a discrete particle method was evaluated and used in numerical simulations of low-velocity penetration in sand. Hemispherical, blunt, and ogival-nosed impactors were tested at striking velocities below 5 ...
    • Docol 600 DL Steel Plates Subjected to Blast Loading: Numerical Simulations and Experimental Validation 

      Heggelund, Solveig (Master thesis, 2014)
      The main objective in this thesis is to further investigate the accuracy of the accumulated blast impulse and plate response employing this method, and comparing the results with performed experiments. Experiments were ...
    • Dynamic versus quasi-static loading of X65 offshore steel pipes 

      Kristoffersen, Martin; Børvik, Tore; Langseth, Magnus; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2016)
      Anchors or trawl gear occasionally impact offshore pipelines, resulting in large local and global deformations. Impact velocities are typically less than 5 m/s, but local strain rates may be very high. In this study strain ...
    • 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 ...
    • Effects of Heat Treatment on the Ballistic Properties of AA6070 Aluminium Plates 

      Holmen, Jens Kristian; Johnsen, Joakim (Master thesis, 2012)
      The thesis includes a summary of important theory in the fields of impact engineering and plasticity theory, and a literature study is carried out on aluminium designations, alloying and heat treatment. The true stress-strain ...
    • Energy absorption and damage prevention in a submerged floating tunnel during internal blast loading 

      Tømte, Anders (Master thesis, 2015)
      Experiments on sandwich structures with an aluminum foam core and aluminum sheet plates are done in the shock tube facility at SIMLab. Aluminum foam is a lightweight material with many applications in a wide range of fields. ...
    • Experimental and Numerical Study on Plated Structures Subjected to Blast Loading - Numerical Simulations and Experimental Validation 

      Baglo, Cecilie; Dybvik, Therese Myrstad (Master thesis, 2015)
      The main objective of this thesis was to investigate the response of thin plates, made of Docol 600 DL steel and the aluminium alloy EN-AW-1050A-H14, subjected to blast loading. The intention was also to validate the use ...