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. International Institute of Refrigeration
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

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
  Vitenskapelig artikkel
• 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)
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel

2022

• 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
  Vitenskapelig artikkel
• Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya. (2022) Coupled fluid-solid modelling of the valve dynamics in reciprocating compressors. International Institute of Refrigeration
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel

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
  Vitenskapelig artikkel
• 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. International Institute of Refrigeration
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

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
  Vitenskapelig artikkel

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
  Vitenskapelig artikkel

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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel

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
  Vitenskapelig artikkel

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
  Vitenskapelig artikkel

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
  Vitenskapelig artikkel
• Benallal, A; Berstad, Torodd; Børvik, Tore; des Codes, RN; 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
  Vitenskapelig artikkel
• Berstad, Torodd; Dørum, Cato; Jakobsen, Jana Poplsteinova; Kragset, Steinar; Li, Hailong; Lund, Halvor. (2011) CO2 pipeline integrity: A new evaluation methodology. Energy Procedia
  Vitenskapelig artikkel

2010

• Clausen, Arild Holm; Hovden, Martin Thuve; Polanco-Loria, Mario; Berstad, Torodd; Hopperstad, Odd Sture. (2010) Constitutive nodel for thermoplastics - calibration and validation.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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. The American Society of Mechanical Engineers (ASME)
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

2009

• Dørum, Cato; Dispinar, D.; Hopperstad, Odd Sture; Berstad, Torodd. (2009) A probabilistic approach for modelling of fracture in magnesium die-castings. La Metallurgia Italiana
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• Dørum, Cato; Hopperstad, Odd Sture; Berstad, Torodd; Dispinar, D. (2009) Numerical modelling of magnesium die-castings using stochastic fracture parameters. Engineering Fracture Mechanics
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• Olden, Vigdis; Thaulow, Christian; Berstad, Torodd; Østby, Erling. (2009) Prediction of Hydrogen Embrittlement in 25% CR Duplex Stainless Steel Based on Cohesive Zone Simulation.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• 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.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2009) A Constitutive Model for Thermoplastics Intended for Structural Applications.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• 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. EDP Sciences
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Chen, Yan; Hopperstad, Odd Sture; Clausen, Arild Holm; Børvik, Tore; Berstad, Torodd. (2009) Finite element analyses of Charpy tests on extruded aluminium alloys. EDP Sciences
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

2008

• Benallal, A; Berstad, Torodd; Børvik, Tore; Hopperstad, Odd Sture; Koutiri, I; de Codes, RN. (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
  Vitenskapelig artikkel
• Benallal, Ahmed; Berstad, Torodd; Børvik, Tore; Hopperstad, Odd Sture; Nogueira de Codes, R. (2008) Effects of strain rate on the characteristics of PLC deformation bands for AA5083-H116 aluminium alloy. Philosophical Magazine
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• Benallal, Ahmed; Berstad, Torodd; Børvik, Tore; Hopperstad, Odd Sture; Nogueira de Codes, R. (2008) On the Measurement and Evaluation of the Width of Portevin–Le Chatelier Deformation Bands with Application to AA5083-H116 Aluminium Alloy. Springer
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2008) A modified Boyce-Raghava model for constitutive modelling of thermoplastics.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2008) A Constitutive Model for Thermoplastics in Structural Applications.
  Annet
• Dørum, Cato; Dispinar, D; Berstad, Torodd; Hopperstad, Odd Sture. (2008) A probabilistic approach for modelling of fracture in magnesium die-castings.
  Annet
• Dørum, Cato; Hopperstad, Odd Sture; Berstad, Torodd; Laukli, Hans Ivar. (2008) A probabilistic approach for modelling fracture in die-castings.
  Annet
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel

2007

• 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
  Vitenskapelig artikkel
• 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. Tapir Akademisk Forlag
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

2006

• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Fagbok
• 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.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• 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. John Wiley & Sons
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Berstad, Torodd; Hopperstad, Odd Sture; Clausen, Arild Holm; Ilstad, Håvar; Melve, Bjørn. (2006) Implementation of Constitutive Model for Thermoplastics with some Preliminary Results.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel

2005

• 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
  Rapport
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• 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.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• 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
  Vitenskapelig artikkel

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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel

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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel

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
  Rapport
• 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
  Vitenskapelig artikkel
• 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]
  Rapport

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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel

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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel

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
  Vitenskapelig artikkel