• Impact behaviour of stiffened aluminium plates 

      Kårstad, Bente Larsen; Skajaa, Birgitte (Master thesis, 2015)
      In this master thesis, impact loading against stiffened aluminium plates of the aluminium alloy AA6082-T6 was studied. The main objective was to study the behaviour of extruded aluminium profiles welded together when exposed ...
    • Impact Behaviour of Stiffened Aluminium Plates 

      Lien, Even Josten; Skyrud, Aleksander (Master thesis, 2016)
      In this master thesis stiffened aluminium plates of the aluminium alloy AA6082 subjected to impact loading was studied. The main objective was to study the behaviour of welded and stiffened aluminium plates exposed to ...
    • Impact behaviour of stiffened steel plates 

      Sølvernes, Sindre Hellem (Master thesis, 2015)
      The impact behavior of stiffened steel plates subjected to impact loading from concentrated loads was studied experimentally and numerically. Both dynamic and quasi-static tests of stiffened steel plates with geometry ...
    • Impact Loading on Parts made of Injection-moulded PP 

      Berntsen, John Fredrick (Master thesis, 2015)
      This project is set as a part of the ongoing development of the constitutive model the SIMLab Polymer Model (SPM) developed at SIMLab, NTNU. The goal with this thesis is to explore the capabilities of this model using two ...
    • Influence of yield surface curvature on the macroscopic yielding and ductile failure of isotropic porous plastic materials 

      Dæhli, Lars Edvard; Morin, David; Børvik, Tore; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2017)
      Numerical unit cell models of an approximative representative volume element for a porous ductile solid are utilized to investigate differences in the mechanical response between a quadratic and a non-quadratic matrix yield ...
    • Low-velocity impact behaviour and failure of stiffened steel plates 

      Gruben, Gaute; Sølvernes, S; Berstad, Torodd; Morin, David; Hopperstad, Odd Sture; Langseth, Magnus (Journal article; Peer reviewed, 2017)
      The behaviour and failure of stiffened steel plates subjected to transverse loading by an indenter is studied in this paper. Low-velocity dynamic and quasi-static tests of stiffened plates with geometry adopted from a ...
    • Macroscopic modelling of flow-drill screw connections in thin-walled aluminium structures 

      Sønstabø, Johan Kolstø; Morin, David; Langseth, Magnus (Journal article; Peer reviewed, 2016)
      This paper presents an investigation on the modelling of flow-drill screw connections in thin-walled aluminium plates in large-scale finite element analyses using different macroscopic modelling techniques. Five models ...
    • Macroscopic strength and failure properties of flow-drill screw connections 

      Sønstabø, Johan Kolstø; Holmstrøm, Petter Henrik; Morin, David; Langseth, Magnus (Journal article; Peer reviewed, 2015)
      Force–displacement responses and failure behaviour of connections using flow-drill screws to join aluminium sheets were investigated under various quasi-static loading conditions. This included single connector tests under ...
    • Mechanical Behaviour of a Mineral Filled Elastomer Modified Polypropylene Compound - An Experimental-Numerical Investigation 

      Storheim, Birgitte (Master thesis, 2017)
      The present work is concerned with the mechanical behaviour of the mineral filled elastomer modified polypropylene compound found in the frontal bumper covering of the BMW 5-series (G30). Material tests machined from ...
    • Modelling and testing of thick aluminium castings under impact loadings 

      Martinsen, Christoffer (Master thesis, 2018)
      The main task of this thesis is to evaluate the capacity of a novel modelling approach for aluminium casting to describe the behaviour and failure of an aluminium rim under dynamic loadings. The thesis work will involve ...
    • Numerical Implementation of Brittle Failure Model for Glass 

      Næss, Nora Storebø (Master thesis, 2017)
      This thesis is concerned with a strength model for float glass. Failure of glass is usually initiated from surface flaws and the glass is reckoned as failed with the first failing flaw. The model implements a flaw map over ...
    • Numerical study of ductile failure under non-proportional loading 

      Morin, David; Dæhli, Lars Edvard; Børvik, Tore; Benallal, Ahmed; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2019)
      This paper investigates two numerical methods for predicting the initiation of ductile failure under moderately and strongly non-proportional loading paths. Two distinct phenomena are considered as indicators for the ...
    • On the description of ductile fracture in metals by the strain localization theory 

      Morin, David; Hopperstad, Odd Sture; Benallal, Ahmed (Journal article; Peer reviewed, 2017)
      Numerical simulations based on the bifurcation and imperfection versions of the strain localization theory are used in this paper to predict the failure loci of metals and applied to an advanced high strength steel subjected ...
    • On the effect of plastic anisotropy, strength and work hardening on the tensile ductility of aluminium alloys 

      Frodal, Bjørn Håkon; Morin, David; Børvik, Tore; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2019)
      The influence of plastic anisotropy, yield strength and work hardening on ductile failure is studied by nonlinear finite element simulations and strain localization analyses of tensile tests in different material orientations. ...
    • Plastmaterialer påkjent av skjærbelastning 

      Øygarden, Jesper (Master thesis, 2016)
      Hensikten med denne rapporten er å se på hvor godt en materialmodell beskriver materialoppførselen til en termoplast i skjær. Dette er gjort ved sammenligne resultatene fra plane skjærtester med med resultatene fra den ...
    • Progressive collapse of buildings caused by explosion 

      Dalen, Fredrik Schjelderup (Master thesis, 2016)
      Extreme loading may cause failure or damage to structural building members. Redistribution of forces might propagate the local failure into a complete or partial progressive collapse of the building. The prevailing method ...
    • Simulation of blast-loaded aluminium plates with crack-like defects 

      Granum, Henrik; Morin, David; Børvik, Tore; Hopperstad, Odd Sture (Chapter, 2019)
      This paper presents a numerical study on the response of blast-loaded AA6016 T4 aluminium plates with crack-like defects. Explicit finite element simulations were performed with LS-DYNA, using an uncoupled plasticity and ...
    • Static and dynamic testing and modelling of aluminium joints with flow-drill screw connections 

      Sønstabø, Johan Kolstø; Morin, David; Langseth, Magnus (Journal article; Peer reviewed, 2018)
      A new component test suited for quasi-static and dynamic testing of flow-drill screw connections is presented. The component specimen was made of two different aluminium alloys, and included connections with two material ...
    • Static crushing of aluminium tubes filled with PET foam and a GFRP skeleton. Numerical modelling and multiobjective optimization. 

      Costas, Miguel; Morin, David; Langseth, Magnus; Díaz, Jacobo M.; Romera, Luis Esteban (Journal article; Peer reviewed, 2017)
      This investigation focuses on the multiobjective optimization of a crash box subjected to static loading by using a validated numerical model and an analytical approach. The crash box is made with a unique combination of ...
    • Strain localization and ductile fracture in advanced high-strength steel sheets 

      Gruben, Gaute; Morin, David; Langseth, Magnus; Hopperstad, Odd Sture (Journal article, 2017)
      An experimental-numerical approach is applied to determine the strain localization and ductile fracture of high-strength dual-phase and martensitic steel sheet materials. To this end, four different quasi-static material ...