2024

• Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya. (2024) Numerical modelling of the solid- and fluid dynamic phenomena controlling the ring plate valve motion and tumbling.
  Academic chapter/article/Conference paper

2023

• Xu, Jianbin; Hopperstad, Odd Sture; Holmedal, Bjørn; Berstad, Torodd; Manik, Tomas; Marthinsen, Knut. (2023) On the spatio-temporal characteristics of the Portevin-Le Chatelier effect in aluminium alloy AA5182: An experimental and numerical study. International journal of plasticity
  Academic article
• Dæhli, Lars Edvard Blystad; Johnsen, Joakim; Berstad, Torodd; Børvik, Tore; Hopperstad, Odd Sture. (2023) An experimental–numerical study on the evolution of the Taylor–Quinney coefficient with plastic deformation in metals. Mechanics of materials (Print)
  Academic article
• Brekken, Kristoffer Aune; Bakk, Maria Sagberg; Dey, Sumita; Berstad, Torodd; Reyes, Aase; Børvik, Tore. (2023) On the ballistic perforation resistance of a sandwich structure with aluminium skins and aluminium foam core. Materials Letters
  Academic article

2022

• Elveli, Benjamin Stavnar; Berstad, Torodd; Børvik, Tore; Aune, Vegard. (2022) Performance of thin blast-loaded steel plates after ballistic impact from small-arms projectiles. International Journal of Impact Engineering
  Academic article
• Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya. (2022) Coupled fluid-solid modelling of the valve dynamics in reciprocating compressors.
  Academic chapter/article/Conference paper
• Færgestad, Rannveig Marie; Holmen, Jens Kristian; Berstad, Torodd; Cardone, Tiziana; Ford, Kevin Anthony; Børvik, Tore. (2022) Coupled finite element-discrete element method (FEM/DEM) for modelling hypervelocity impacts. Acta Astronautica
  Academic article
• Elveli, Benjamin Stavnar; Vestrum, Ole; Hauge, Knut Ove; Berstad, Torodd; Børvik, Tore; Aune, Vegard. (2022) Thin steel plates exposed to combined ballistic impact and partially confined airblast loading. Engineering Failure Analysis
  Academic article

2021

• Holmström, Petter Henrik; Clausen, Arild Holm; Berstad, Torodd; Morin, David; Hopperstad, Odd Sture. (2021) A pragmatic orthotropic elasticity-based damage model with spatially distributed properties applied to short glass-fibre reinforced polymers. International Journal of Solids and Structures
  Academic article
• Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya. (2021) Modelling the dynamics of ring plate valves in reciprocating compressors using coupled CFD-FEM simulations.
  Academic chapter/article/Conference paper

2020

• Brekken, Kristoffer Aune; Reyes, Aase Gavina Roberg; Berstad, Torodd; Langseth, Magnus; Børvik, Tore. (2020) Sandwich panels with polymeric foam cores exposed to blast loading: An experimental and numerical investigation. Applied Sciences
  Academic article

2017

• Gruben, Gaute; Sølvernes, Sindre Hellem; Berstad, Torodd; Morin, David; Hopperstad, Odd Sture; Langseth, Magnus. (2017) Low-velocity impact behaviour and failure of stiffened steel plates. Marine Structures
  Academic article

2014

• Ognedal, Anne Serine; Clausen, Arild Holm; Berstad, Torodd; Seelig, Thomas; Hopperstad, Odd Sture. (2014) Void nucleation and growth in mineral-filled PVC - An experimental and numerical study. International Journal of Solids and Structures
  Academic article
• Saai, Afaf; Svenum, I.-H.; Kane, Pascal-Alexandre; Friis, Jesper; Berstad, Torodd. (2014) Multi-scale modeling of WC-Co drill bits material with density functional theory and crystal elasticity model. Procedia Materials Science
  Academic article

2013

• Aursand, Eskil; Aursand, Peder; Berstad, Torodd; Dørum, Cato; Hammer, Morten; Munkejord, Svend Tollak. (2013) CO2 pipeline integrity: A coupled fluid-structure model using a reference equation of state for CO2. Energy Procedia
  Academic article

2012

• Nordhagen, Håkon Ottar; Kragset, Steinar; Berstad, Torodd; Morin, Alexandre; Dørum, Cato; Munkejord, Svend Tollak. (2012) A new coupled fluid-structure modeling methodology for running ductile fracture. Computers & structures
  Academic article

2011

• Kane, Alexandre; Børvik, Tore; Berstad, Torodd; Benallal, A; Hopperstad, Odd Sture. (2011) Failure criteria with unilateral conditions for simulation of plate perforation. European Journal of Mechanics. A, Solids
  Academic article
• Benallal, A; Berstad, Torodd; Børvik, Tore; Codes, RN des; Hopperstad, Odd Sture. (2011) Computational aspects in presence of negative strain-rate sensitivity with application to aluminium alloys exhibiting the Portevin-Le Chatelier effect. Modelling and Simulation in Materials Science and Engineering
  Academic article
• Berstad, Torodd; Dørum, Cato; Jakobsen, Jana Poplsteinova; Kragset, Steinar; Li, Hailong; Lund, Halvor. (2011) CO2 pipeline integrity: A new evaluation methodology. Energy Procedia
  Academic article

2010

• Clausen, Arild Holm; Hovden, Martin Thuve; Polanco-Loria, Mario; Berstad, Torodd; Hopperstad, Odd Sture. (2010) Constitutive nodel for thermoplastics - calibration and validation.
  Academic chapter/article/Conference paper
• Kane, Alexandre; Østby, Erling; Lademo, Odd-Geir; Berstad, Torodd; Hopperstad, Odd Sture. (2010) EFFECTS OF THE YIELD CRITERION ON PREDICTED FRACTURE RESPONSES OF PIPELINES SUBJECTED TO LARGE PLASTIC DEFORMATION WITH AND WITHOUT INTERNAL PRESSURE.
  Academic chapter/article/Conference paper
• Benallal, A; Berstad, Torodd; Børvik, Tore; Hopperstad, Odd Sture. (2010) Uniqueness, loss of ellipticity and localization for the time-discretized, rate-dependent boundary value problem with softening. International Journal for Numerical Methods in Engineering
  Academic article
• Dørum, Cato; Lademo, Odd-Geir; Myhr, Ole Runar; Berstad, Torodd; Hopperstad, Odd Sture. (2010) Finite element analysis of plastic failure in heat-affected zone of welded aluminium connections. Computers & structures
  Academic article
• Lademo, Odd-Geir; Engler, Olaf; Aegerter, J; Berstad, Torodd; Benallal, A; Hopperstad, Odd Sture. (2010) Strain-Rate Sensitivity of Aluminum Alloys AA1200 and AA3103. Journal of engineering materials and technology
  Academic article
• Polanco-Loria, Mario A.; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2010) Constitutive model for thermoplastics with structural applications. International Journal of Impact Engineering
  Academic article

2009

• Olden, Vigdis; Thaulow, Christian; Berstad, Torodd; Østby, Erling. (2009) Prediction of Hydrogen Embrittlement in 25% CR Duplex Stainless Steel Based on Cohesive Zone Simulation.
  Academic chapter/article/Conference paper
• Dørum, Cato; Dispinar, D.; Hopperstad, Odd Sture; Berstad, Torodd. (2009) A probabilistic approach for modelling of fracture in magnesium die-castings. La Metallurgia Italiana
  Academic article
• Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2009) A Constitutive Model for Thermoplastics Intended for Structural Applications.
  Academic chapter/article/Conference paper
• Clausen, Arild Holm; Polanco-Loria, Mario A.; Moura, Rafael Traldi; Alves, Marcilio; Berstad, Torodd; Langseth, Magnus. (2009) Polymer plates subjected to impact: Experimental tests and numerical simulations.
  Academic chapter/article/Conference paper
• Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Berstad, Torodd; Lademo, Odd-Geir. (2009) Forming limit diagrams with an FE-based approach for sheets under non-proportional loading.
  Academic chapter/article/Conference paper
• Chen, Yan; Hopperstad, Odd Sture; Clausen, Arild Holm; Børvik, Tore; Berstad, Torodd. (2009) Finite element analyses of Charpy tests on extruded aluminium alloys.
  Academic chapter/article/Conference paper
• Olden, Vigdis; Thaulow, Christian; Johnsen, Roy; Østby, Erling; Berstad, Torodd. (2009) Influence of hydrogen from cathodic protection on the fracture susceptibility of 25%Cr duplex stainless steel - Constant load SENT testing and FE-modelling using hydrogen influenced cohesive zone elements. Engineering Fracture Mechanics
  Academic article
• Dumoulin, Stephane C.; Hopperstad, Odd Sture; Berstad, Torodd. (2009) Investigation of integration algorithms for rate-dependent crystal plasticity using explicit finite element codes. Computational Materials Science
  Academic article
• Lademo, Odd-Geir; Engler, Olaf; Keller, S; Berstad, Torodd; Pedersen, Ketill Olav; Hopperstad, Odd Sture. (2009) Identification and validation of constitutive model and fracture criterion for AlMgSi alloy with application to sheet forming. Materials & design
  Academic article
• Dørum, Cato; Hopperstad, Odd Sture; Berstad, Torodd; Dispinar, D. (2009) Numerical modelling of magnesium die-castings using stochastic fracture parameters. Engineering Fracture Mechanics
  Academic article

2008

• Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Berstad, Torodd; Lademo, Odd-Geir. (2008) Prediction of necking for two aluminum alloys under non-proportional loading by using an FE-based approach. International Journal of Material Forming
  Academic article
• Olden, Vigdis; Thaulow, Christian; Johnsen, Roy; Østby, Erling; Berstad, Torodd. (2008) Application of hydrogen influenced cohesive laws in the prediction of hydrogen induced stress cracking in 25%Cr duplex stainless steel. Engineering Fracture Mechanics
  Academic article
• Pedersen, Ketill Olav; Lademo, Odd-Geir; Berstad, Torodd; Furu, Trond; Hopperstad, Odd Sture. (2008) Influence of texture and grain structure on strain localisation and formability for AlMgSi alloys. Journal of Materials Processing Technology
  Academic article
• Benallal, Ahmed; Berstad, Torodd; Børvik, Tore; Hopperstad, Odd Sture; Codes, R Nogueira de. (2008) On the Measurement and Evaluation of the Width of Portevin–Le Chatelier Deformation Bands with Application to AA5083-H116 Aluminium Alloy.
  Academic chapter/article/Conference paper
• Benallal, A; Berstad, Torodd; Børvik, Tore; Hopperstad, Odd Sture; Koutiri, I; Codes, RN de. (2008) An experimental and numerical investigation of the behaviour of AA5083 aluminium alloy in presence of the Portevin-Le Chatelier effect. International journal of plasticity
  Academic article
• Polanco-Loria, Mario A.; Hopperstad, Odd Sture; Børvik, Tore; Berstad, Torodd. (2008) Numerical predictions of ballistic limits for concrete slabs using a modified version of the HJC concrete model. International Journal of Impact Engineering
  Academic article
• Lademo, Odd-Geir; Berstad, Torodd; Eriksson, Magnus; Tryland, Tore Helge; Furu, Trond; Hopperstad, Odd Sture. (2008) A model for process-based crash simulation. International Journal of Impact Engineering
  Academic article
• Lademo, Odd-Geir; Pedersen, Ketill Olav; Berstad, Torodd; Furu, Trond; Hopperstad, Odd Sture. (2008) An experimental and numerical study on the formability of textured AlZnMg alloys. European Journal of Mechanics. A, Solids
  Academic article
• Benallal, Ahmed; Berstad, Torodd; Børvik, Tore; Hopperstad, Odd Sture; Codes, R Nogueira de. (2008) Effects of strain rate on the characteristics of PLC deformation bands for AA5083-H116 aluminium alloy. Philosophical Magazine
  Academic article
• Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2008) A modified Boyce-Raghava model for constitutive modelling of thermoplastics.
  Academic chapter/article/Conference paper

2007

• Chen, Yan; Hopperstad, Odd Sture; Lademo, Odd-Geir; Clausen, Arild Holm; Berstad, Torodd; Langseth, Magnus. (2007) Preliminary simulations of the instrumented Charpy V-notch impact test.
  Academic chapter/article/Conference paper
• Hopperstad, Odd Sture; Børvik, Tore; Berstad, Torodd; Lademo, Odd-Geir; Benallal, Ahmed. (2007) A numerical study on the influence of the Portevin-Le Chatelier effect on necking in an aluminium alloy. Modelling and Simulation in Materials Science and Engineering
  Academic article

2006

• Hopperstad, Odd Sture; Børvik, Tore; Berstad, Torodd; Lademo, Odd-Geir; Benallal, Ahmed. (2006) A preliminary numerical study on the influence of PLC on formability of aluminium alloys.
  Academic chapter/article/Conference paper
• Benallal, Ahmed; Berstad, Torodd; Børvik, Tore; Clausen, Arild Holm; Hopperstad, Odd Sture. (2006) Dynamic strain aging and related instabilities: experimental, theoretical and numerical aspects. European Journal of Mechanics. A, Solids
  Academic article
• Hanssen, Arve Grønsund; Girard, Y; Olovsson, L; Berstad, T; Langseth, Magnus. (2006) A numerical model for bird strike of aluminium foam-based sandwich panels. International Journal of Impact Engineering
  Academic article
• Furu, Trond; Dons, Anne Lise; Berstad, Torodd; Holmedal, Bjørn; Marthinsen, Knut. (2006) Through Process Modeling of Extrusion: Evolution in Microstructure and Mechanical Properties through the whole Process Chain from As Cast and Homogenized Condition to Forming of Profiles.
  Academic chapter/article/Conference paper
• Hopperstad, Odd Sture; Børvik, Tore; Berstad, T; Benallal, A. (2006) Finite element simulations of the Portevin-Le Chatelier effect in aluminium alloy. Journal de Physique IV : Colloque
  Academic article
• Clausen, Arild Holm; Auestad, Trond; Berstad, T; Børvik, Tore; Langseth, Magnus. (2006) High-temperature tests on aluminium in a split-Hopkinson bar - Experimental set-up and numerical predictions. Journal de Physique IV : Colloque
  Academic article
• Berstad, Torodd; Hopperstad, Odd Sture; Clausen, Arild Holm; Ilstad, Håvar; Melve, Bjørn. (2006) Implementation of Constitutive Model for Thermoplastics with some Preliminary Results.
  Academic chapter/article/Conference paper
• Hirsch, J; Holmedal, Bjørn; Nes, Erik Aasmund; Marthinsen, Knut; Engler, Olaf; Abtahi, Shahriar. (2006) Virtual Fabrication of Aluminium Products. John Wiley & Sons John Wiley & Sons
  Non-fiction book
• Kokkula, Satyanarayana; Hopperstad, Odd Sture; Lademo, Odd-Geir; Berstad, T; Langseth, Magnus. (2006) Offset impact behaviour of bumper beam-longitudinal systems: numerical simulations. International Journal of Crashworthiness
  Academic article

2005

• Lademo, Odd-Geir; Hopperstad, Odd Sture; Berstad, Torodd; Langseth, Magnus. (2005) Prediction of plastic instability and fracture in extruded aluminium alloys in shell element analysis.
  Academic chapter/article/Conference paper
• Berstad, Torodd; Furu, Trond; Holmedal, Bjørn; Hopperstad, Odd Sture; Lademo, Odd-Geir; Nes, Erik Aasmund. (2005) "FEM and a microstructure based work hardening model used to calculate forming limit curves". International Journal of Forming Processes
  Academic article
• Hopperstad, Odd Sture; Børvik, Tore; Berstad, Torodd; Clausen, Arild Holm; Benallal, Ahmed. (2005) A hypoelastic-viscoplastic constitutive model in LS-DYNA for dynamic strain aging – the McCormick model. Institutt for konstruksjonsteknikk, NTNU Institutt for konstruksjonsteknikk, NTNU
  Report
• Lademo, Odd-Geir; Hopperstad, Odd Sture; Berstad, Torodd; Langseth, Magnus. (2005) Prediction of plastic instability in extruded aluminium alloys using shell analysis and a coupled model of elasto-plasticity and damage. Journal of Materials Processing Technology
  Academic article
• Børvik, Tore; Clausen, Arild Holm; Eriksson, Magnus; Berstad, Torodd; Hopperstad, Odd Sture; Langseth, Magnus. (2005) Experimental and numerical study on the perforation of AA6005-T6 panels. International Journal of Impact Engineering
  Academic article
• Fjeldbo, Snorre Kjørstad; Holmedal, Bjørn; Lademo, Odd-Geir; Bjerkaas, Hans; Støren, Sigurd; Roven, Hans Jørgen. (2005) A numerical study on the onset of plastic instability in extruded materials with strong through-thickness texture variation.
  Academic chapter/article/Conference paper

2004

• Lademo, Odd-Geir; Berstad, Torodd; Pedersen, Ketill Olav; Hopperstad, Odd Sture. (2004) A numerical tool for formability analysis of aluminium alloys. Steel Grips - Journal of Steel and Related Materials
  Academic article
• Berstad, Torodd; Furu, Trond; Holmedal, Bjørn; Hopperstad, Odd Sture; Lademo, Odd-Geir; Nes, Erik Aasmund. (2004) FEM and a microstructure based work hardening model used to calculate forming limit curves. Esaform Conference on Material Forming. ESAFORM : Proceedings
  Academic article
• Furu, Trond; Johansen, Arve; Sæter, Jan Anders; Dons, Anne Lise; Pedersen, Ketill Olav; Berstad, Torodd. (2004) Through process modeling of extrusion: Evolution in microstructure and mechanical properties through the hole process chain from as cast and homogenized condition to forming of profiles. Aluminium
  Academic article
• Lademo, Odd-Geir; Berstad, Torodd; Pedersen, Ketill Olav; Hopperstad, Odd Sture. (2004) A numerical tool for formability analysis of aluminium alloys: Part II. Steel Grips - Journal of Steel and Related Materials
  Academic article
• Lademo, Odd-Geir; Berstad, Torodd; Eriksson, Magnus; Tryland, Tore; Furu, Trond; Hopperstad, Odd Sture. (2004) "A model for process-based crash simulation". International Journal of Crashworthiness
  Academic article

2003

• Børvik, Tore; Hopperstad, Odd Sture; Berstad, Torodd. (2003) On the Influence of Stress Triaxiality and Strain Rate on the Behaviour of a structural Steel. Part II. Numerical study. European Journal of Mechanics. A, Solids
  Academic article
• Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Berstad, Torodd; Hanssen, Arve Grønsund; Langseth, Magnus. (2003) Constitutive modeling of aluminum foam including fracture and statistical variation of density. European Journal of Mechanics. A, Solids
  Academic article

2002

• Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Berstad, Torodd; Langseth, Magnus. (2002) Implementation of a material model for aluminum foam in LS-DYNA. Department of Structural Engineering Department of Structural Engineering
  Report
• Hildrum, Hilde Giæver; Berstad, Torodd; Lademo, Odd-Geir; Malo, Kjell A.; Hopperstad, Odd Sture. (2002) An Introductory FEM Study of Strain Localisation in Welded Aluminium Structures. Part II: Fiilet Weld. [Mangler utgivernavn] [Mangler utgivernavn]
  Report
• Børvik, Tore; Hopperstad, Odd Sture; Berstad, Torodd; Langseth, Magnus. (2002) Perforation of 12 mm Thick Steel Plates by 20 mm diameter Projectiles with Blunt, Hemispherical and Conical Noses, Part II: Numerical Simulations. International Journal of Impact Engineering
  Academic article

2001

• Børvik, Tore; Hopperstad, Odd Sture; Berstad, T; Langseth, Magnus. (2001) Numerical Simulation of Plugging Failure in Ballistic Penetration. International Journal of Solids and Structures
  Academic article
• Børvik, Tore; Langseth, Magnus; Hopperstad, Odd Sture; Berstad, T. (2001) A Computational Model of Viscoplasticity and Ductile Damage for Impact and Penetration. European Journal of Mechanics. A, Solids
  Academic article

1999

• Langseth, Magnus; Hopperstad, Odd Sture; Berstad, Torodd. (1999) Impact loading of plates. Validation of numerical simulations by testing. International Journal of Offshore and Polar Engineering
  Academic article
• Langseth, Magnus; Hopperstad, Odd Sture; Berstad, Torodd. (1999) Crashworthiness of Aluminium Extrusions: Validation of Numerical Simulations, Effect of Mass Ratio and Impact Velocity. International Journal of Impact Engineering
  Academic article
• Mathisen, Kjell Magne; Hopperstad, Odd Sture; Okstad, Knut Morten; Berstad, Torodd. (1999) Error Estimation and Adaptivity in Explicit Nonlinear Finite Element Simulation of Quasi-Static Problems. Computers & structures
  Academic article

1998

• Hopperstad, Odd Sture; Berstad, Torodd; Ilstad, Håvar; Lademo, Odd-Geir; Langseth, Magnus. (1998) Effects of the Yield Criterion on Local Deformations in Numerical Simulation of Profile Forming. Journal of Materials Processing Technology
  Academic article