Blar i NTNU Open på forfatter "Kristoffersen, Martin"

Viser treff 21-40 av 48

    • Experimental and numerical studies on the structural response of normal strength concrete slabs subjected to blast loading 

      Kristoffersen, Martin; Pettersen, Jon Eide; Aune, Vegard; Børvik, Tore (Journal article; Peer reviewed, 2018)
      To assess the blast performance of concrete structures, a shock tube has been used to simulate blast loading against concrete slabs of two different mixes ordered as C45/55 and C20/25. The C45/55 slabs were tested without ...

    • Fracture mechanisms in largely strained solids due to surface instabilities 

      Erice, Borja; Perez-Martin, Maria Jesus; Kristoffersen, Martin; Morin, David; Børvik, Tore; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2020)
      The effect of self-contacting surface defects generated by largely compressing metals on the ductile-to-brittle transition observed in metallic structures is investigated. In order to analyse such an effect, a finite element ...

    • Fragmentation of metallic materials during impact 

      Kristoffersen, Martin; Hyland, Even (Master thesis, 2010)
      Studies on shear-plug formation and on double-layered steel plates impacted by blunt-nosed hardened steel projectiles showed that at certain velocities against certain targetplates the projectiles shattered upon impact. ...

    • Hollow core slabs in the assembly process - Structural behaviour and strength during positioning of elements 

      Kanstad, Terje; Cantero, Daniel; Kristoffersen, Martin; Ji, Guomin (Research report, 2023)

    • Hollow-Core Floors' Capacity Against Falling Elements in the Construction Phase 

      Kjekstad, Paal Johannes Omsland; Løseth, Ole Johan Gustad (Master thesis, 2022)
      Oppgaven tar for seg om ett utstøpt og samvirkende hulldekkegulv tåler at ett hulldekke faller ned fra en etasje over under bygging. Tre fullskala tester ble gjennomført hos Contiga AS i Stjørdalen, der tre dekker ble støpt ...

    • Hollow-Core Floors’ Resistance Against Falling Elements in the Construction Phase 

      Kjekstad, Paal Johannes Omsland; Løseth, Ole Johan Gustad (Master thesis, 2022)
      Oppgaven tar for seg om ett utstøpt og samvirkende hulldekkegulv tåler at ett hulldekke faller ned fra en etasje over under bygging. Tre fullskala tester ble gjennomført hos Contiga AS i Stjørdalen, der tre dekker ble støpt ...

    • 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. – ...

    • Impact Against Offshore Pipelines 

      Mogstad, Ivar; Asheim, Tom Inge (Master thesis, 2013)
      Impact against offshore pipelines is investigated in this thesis. Introductory low velocity experiments on pipeline specimens using the stretch bending rig at the Department of Structural Engineering, NTNU, were carried ...

    • Impact against X65 offshore pipelines 

      Kristoffersen, Martin (Doctoral thesis at NTNU;2014:362, Doctoral thesis, 2014)
      This thesis presents both experimental and numerical investigations into some of the plethora of parameters influencing pipeline impact behaviour and the potential fracture arising thereof. The seamless pipes studied are ...

    • Impact against X65 steel pipes - An experimental investigation 

      Kristoffersen, Martin; Børvik, Tore; Westermann, Ida; Langseth, Magnus; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2013)
      Offshore pipelines subjected to accidental loads, such as impacts from trawl gear or anchors, may experience large global displacements from its initial position and large local strains. The axial forces set up during ...

    • Impact on polymer-coated pipelines 

      Frydenberg, Håkon; Torp, Magnus Pjaaka (Master thesis, 2020)
      Denne masteroppgaven inneholder en eksperimentell og numerisk undersøkelse av den mekaniske styrken til undersjøiske rørledninger med isolasjonslag av polymer. Målet med oppgaven var å finne ut hvordan undersjøiske ...

    • Impact on polymer-coated pipelines 

      Frydenberg, Håkon; Torp, Magnus Pjaaka (Master thesis, 2020)
      Denne masteroppgaven inneholder en eksperimentell og numerisk undersøkelse av den mekaniske styrken til undersjøiske rørledninger med isolasjonslag av polymer. Målet med oppgaven var å finne ut hvordan undersjøiske ...

    • Internal Blast Loading of Submerged Floating Tunnels in Concrete 

      Krone, Erika (Master thesis, 2018)
      A submerged floating tunnel (SFT) has been proposed for crossing the fjords which today are operated by ferries along the Norwegian highway E39. One concern with a potential SFT, which probably would be built using reinforced ...

    • Macroporosity and water penetration measurements of sprayed concrete: Open vs closed macroporosity, size, shape, orientation and anisotropy 

      Hårr, Magne Stangeland; Kjeka, Gaute (Master thesis, 2022)
      Hensikten med oppgaven var å undersøke makroporøsitet og permeabilitet til sprøytebetong. Dette innebar å (1) undersøke åpen og lukket makroporøsitet målt med PF-metoden, (2) sammenligne luftinnhold i ulike betongtyper ...

    • Macroporosity and water penetration measurements of sprayed concrete: Open vs closed macroporosity, size, shape, orientation and anisotropy 

      Hårr, Magne Stangeland; Kjeka, Gaute (Master thesis, 2022)
      Hensikten med oppgaven var å undersøke makroporøsitet og permeabilitet til sprøytebetong. Dette innebar å (1) undersøke åpen og lukket makroporøsitet målt med PF-metoden, (2) sammenligne luftinnhold i ulike betongtyper ...

    • NUMERICAL SIMULATIONS OF SUBMERGED AND PRESSURISED X65 STEEL PIPES 

      Kristoffersen, Martin; Casadei, Folco; Børvik, Tore; Langseth, Magnus; Solomos, George; Hopperstad, Odd Sture (Chapter, 2013)
      While in service, pipelines may from time to time be exposed to impact loads from anchors or trawl gear. A lot of parameters influence the behaviour of the pipeline during impact, e.g. the diameter and thickness of the ...

    • On the ballistic impact resistance of additive manufactured maraging steel targets compared to that of cast targets 

      Edwards-Mowforth, Maisie; Costas, Miguel; Kristoffersen, Martin; Teixeira-Dias, Filipe; Børvik, Tore (Chapter, 2023)
      The advent of additive manufacturing (AM) in the defence industry has introduced possibilities for customisable and optimised light-weight armour. Maraging steel is well suited to AM and takes on ultra high-strength post ...

    • 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 ...

    • Pipeline Fracture due to Compression-Tension Loading Caused by Foreign Object Impact 

      Kristoffersen, Martin; Børvik, Tore; Olovsson, Lars (Chapter, 2018)
      In areas frequented by fishing vessels, trawl equipment or anchors may interfere with pipelines and cause damage through impact, potential hooking, and ensuing release of the pipeline. This load sequence of denting followed ...

    • Projectile Impact on Plain and Reinforced Concrete Slabs 

      Jacobsen, Øystein Eirik Kvist; Kristoffersen, Martin; Dey, Sumita; Børvik, Tore (Peer reviewed; Journal article, 2023)
      Reinforced concrete is a material frequently used in protective structures and infrastructure exposed to extreme loading. In this study, the ballistic perforation resistance of 100 mm thick plain and reinforced concrete ...