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  1. Employees

Språkvelger

Norsk

Torodd Berstad

Torodd Berstad

Researcher
Department of Structural Engineering

torodd.berstad@ntnu.no
+4773594522 Materialteknisk, Gløshaugen
Publications Teaching Media

Publications

  • Chronological
  • By category
  • See all publications in Cristin

2023

  • 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). volum 179.
    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. volum 173.
    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. volum 144.
    Academic article
  • Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya; Hattori, Kazuhiro; Yamada, Kazuya; Delhaye, Virgile Roger; Nekså, Petter. (2022) Coupled fluid-solid modelling of the valve dynamics in reciprocating compressors. 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants - GL2022 - Proceedings - Trondheim, Norway, June 13-15th 2022.
    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

2021

  • Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya; Hattori, Kazuhiro; Yamada, Kazuya; Delhaye, Virgile Roger; Nekså, Petter. (2021) Modelling the dynamics of ring plate valves in reciprocating compressors using coupled CFD-FEM simulations. 10th IIR Conference on Compressors and Refrigerants.
    Academic chapter/article/Conference paper
  • 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. volum 230-231.
    Academic article

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. volum 10 (24).
    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. volum 54.
    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. volum 51 (7-8).
    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. volum 3.
    Academic article

2013

  • Aursand, Eskil; Aursand, Peder; Berstad, Torodd; Dørum, Cato; Hammer, Morten; Munkejord, Svend Tollak; Nordhagen, Håkon Ottar. (2013) CO2 pipeline integrity: A coupled fluid-structure model using a reference equation of state for CO2. Energy Procedia. volum 37.
    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. volum 94-95.
    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. volum 30 (4).
    Academic article
  • 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. volum 19 (1).
    Academic article
  • Berstad, Torodd; Dørum, Cato; Jakobsen, Jana Poplsteinova; Kragset, Steinar; Li, Hailong; Lund, Halvor; Morin, Alexandre; Munkejord, Svend Tollak; Mølnvik, Mona Jacobsen; Nordhagen, Håkon Ottar; Østby, Erling. (2011) CO2 pipeline integrity: A new evaluation methodology. Energy Procedia. volum 4.
    Academic article

2010

  • 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. 29th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2010) : Shanghai, China, June 6-11, 2010.
    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. volum 84 (7).
    Academic article
  • Clausen, Arild Holm; Hovden, Martin Thuve; Polanco-Loria, Mario; Berstad, Torodd; Hopperstad, Odd Sture. (2010) Constitutive nodel for thermoplastics - calibration and validation. 19th DYMAT Technical Meeting - Dynamic mechanical behaviour of Polymers and Composites.
    Academic chapter/article/Conference paper
  • 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. volum 88 (9-10).
    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. volum 132 (4).
    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. volum 37 (12).
    Academic article

2009

  • 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. volum 76 (7).
    Academic article
  • Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2009) A Constitutive Model for Thermoplastics Intended for Structural Applications. Proceedings. 7th European LS-DYNA Conference.
    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. Proceedings. 7th European LS-DYNA Conference.
    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. DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Material under Dynamic Loading. Volume 2/2.
    Academic chapter/article/Conference paper
  • Clausen, Arild Holm; Polanco-Loria, Mario A.; Moura, Rafael Traldi; Alves, Marcilio; Berstad, Torodd; Langseth, Magnus; Hopperstad, Odd Sture. (2009) Polymer plates subjected to impact: Experimental tests and numerical simulations. DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Material under Dynamic Loading. Volume 2/2.
    Academic chapter/article/Conference paper
  • 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. volum 46 (4).
    Academic article
  • 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
  • Dørum, Cato; Hopperstad, Odd Sture; Berstad, Torodd; Dispinar, D. (2009) Numerical modelling of magnesium die-castings using stochastic fracture parameters. Engineering Fracture Mechanics. volum 76 (14).
    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. volum 30 (8).
    Academic article
  • Olden, Vigdis; Thaulow, Christian; Berstad, Torodd; Østby, Erling. (2009) Prediction of Hydrogen Embrittlement in 25% CR Duplex Stainless Steel Based on Cohesive Zone Simulation. Proceedings of the ASME 28th International Conference on Ocean, Offshore and Arctic Engineering - OMAE2009.
    Academic chapter/article/Conference paper

2008

  • Dørum, Cato; Dispinar, D; Berstad, Torodd; Hopperstad, Odd Sture. (2008) A probabilistic approach for modelling of fracture in magnesium die-castings. High Tech Die Casting 2008.
    Other
  • Dørum, Cato; Hopperstad, Odd Sture; Berstad, Torodd; Laukli, Hans Ivar. (2008) A probabilistic approach for modelling fracture in die-castings. 8th World Congress on Computational Mechanics, 5th European Congress on Computational Methods in Applied Sciences and Engineering.
    Other
  • 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. volum 75 (8).
    Academic article
  • Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2008) A Constitutive Model for Thermoplastics in Structural Applications. 21st Nordic Seminar on Computational Mechanics.
    Other
  • Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2008) A modified Boyce-Raghava model for constitutive modelling of thermoplastics. Impact Loading of Lightweight Structures.
    Academic chapter/article/Conference paper
  • 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. volum 1 (4).
    Academic article
  • 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. volum 24 (10).
    Academic article
  • 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. volum 88 (28/29).
    Academic article
  • 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. IUTAM Symposium on Theoretical, Computational and Modelling Aspects of Inelastic Media.
    Academic chapter/article/Conference paper
  • Lademo, Odd-Geir; Berstad, Torodd; Eriksson, Magnus; Tryland, Tore Helge; Furu, Trond; Hopperstad, Odd Sture; Langseth, Magnus. (2008) A model for process-based crash simulation. International Journal of Impact Engineering. volum 35 (5).
    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. volum 27 (2).
    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. volum 200 (1-3).
    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. volum 35 (5).
    Academic article

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. Fourth national conference on Computational Mechanics.
    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. volum 15 (7).
    Academic article

2006

  • 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. volum 25 (3).
    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. 9th International LSDYNA Users Conference 2006.
    Academic chapter/article/Conference paper
  • 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. volum 134.
    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. Virtual Fabrication of Aluminium Products.
    Academic chapter/article/Conference paper
  • Hirsch, J; Holmedal, Bjørn; Nes, Erik Aasmund; Marthinsen, Knut; Engler, Olaf; Abtahi, Shahriar; Schneider, Wolfgang; Grun, G.a.; Hamerton, R.; Ekstrom, Hans Erik; Hurd, T.; Van der Vinden, Menno; Brunger, E.; Pettersen, Tanja; Furu, Trond; Gottstein, Gunter; Jacot, A.; Van houtte, Paul; Saiyi, Li. (2006) Virtual Fabrication of Aluminium Products. John Wiley & Sons. 2006. ISBN 3-527-31363-X.
    Non-fiction book
  • 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. volum 134.
    Academic article
  • 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. The 9th International Conference on Material Forming ESAFORM 2006.
    Academic chapter/article/Conference paper
  • 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. volum 11.
    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. volum 32 (7).
    Academic article

2005

  • Berstad, Torodd; Furu, Trond; Holmedal, Bjørn; Hopperstad, Odd Sture; Lademo, Odd-Geir; Nes, Erik Aasmund; Pedersen, Ketill Olav. (2005) "FEM and a microstructure based work hardening model used to calculate forming limit curves". International Journal of Forming Processes. volum 8/SI.
    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. volum 32 (1-4).
    Academic article
  • Fjeldbo, Snorre Kjørstad; Holmedal, Bjørn; Lademo, Odd-Geir; Bjerkaas, Hans; Støren, Sigurd; Roven, Hans Jørgen; Hjelen, Jarle; Hopperstad, Odd Sture; Berstad, Torodd; Pedersen, Ketill Olav; Furu, Trond. (2005) A numerical study on the onset of plastic instability in extruded materials with strong through-thickness texture variation. Proceedings of the 8th Esaform conference on material forming, Volume I.
    Academic chapter/article/Conference paper
  • 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. 2005.
    Report
  • 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. Proceedings of the 8th Esaform conference on material forming, Volume I.
    Academic chapter/article/Conference paper
  • 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. volum 166.
    Academic article

2004

  • Berstad, Torodd; Furu, Trond; Holmedal, Bjørn; Hopperstad, Odd Sture; Lademo, Odd-Geir; Nes, Erik Aasmund; Pedersen, Ketill Olav. (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; Lademo, Odd-Geir; Holmedal, Bjørn; Marthinsen, Knut; Hopperstad, Odd Sture; Nes, Erik Aasmund; Mortensen, D.. (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. volum 80 (6).
    Academic article
  • Lademo, Odd-Geir; Berstad, Torodd; Eriksson, Magnus; Tryland, Tore; Furu, Trond; Hopperstad, Odd Sture; Langseth, Magnus. (2004) "A model for process-based crash simulation". International Journal of Crashworthiness.
    Academic article
  • 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
  • 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

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. volum 22.
    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. volum 22 (6).
    Academic article

2002

  • 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. volum 27 (1).
    Academic article
  • 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. 2002.
    Report
  • Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Berstad, Torodd; Langseth, Magnus. (2002) Implementation of a material model for aluminum foam in LS-DYNA. 2002.
    Report

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. volum 38 (34-35).
    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) Crashworthiness of Aluminium Extrusions: Validation of Numerical Simulations, Effect of Mass Ratio and Impact Velocity. International Journal of Impact Engineering. volum 22.
    Academic article
  • 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. volum 9.
    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. volum 72 (4-5).
    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. volum 80-81.
    Academic article

Journal publications

  • 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). volum 179.
    Academic article
  • 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. volum 173.
    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. volum 144.
    Academic article
  • 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
  • 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. volum 230-231.
    Academic article
  • 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. volum 10 (24).
    Academic article
  • 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. volum 54.
    Academic article
  • 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. volum 51 (7-8).
    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. volum 3.
    Academic article
  • Aursand, Eskil; Aursand, Peder; Berstad, Torodd; Dørum, Cato; Hammer, Morten; Munkejord, Svend Tollak; Nordhagen, Håkon Ottar. (2013) CO2 pipeline integrity: A coupled fluid-structure model using a reference equation of state for CO2. Energy Procedia. volum 37.
    Academic article
  • 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. volum 94-95.
    Academic article
  • 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. volum 30 (4).
    Academic article
  • 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. volum 19 (1).
    Academic article
  • Berstad, Torodd; Dørum, Cato; Jakobsen, Jana Poplsteinova; Kragset, Steinar; Li, Hailong; Lund, Halvor; Morin, Alexandre; Munkejord, Svend Tollak; Mølnvik, Mona Jacobsen; Nordhagen, Håkon Ottar; Østby, Erling. (2011) CO2 pipeline integrity: A new evaluation methodology. Energy Procedia. volum 4.
    Academic article
  • 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. volum 84 (7).
    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. volum 88 (9-10).
    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. volum 132 (4).
    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. volum 37 (12).
    Academic article
  • 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. volum 76 (7).
    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. volum 46 (4).
    Academic article
  • 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
  • Dørum, Cato; Hopperstad, Odd Sture; Berstad, Torodd; Dispinar, D. (2009) Numerical modelling of magnesium die-castings using stochastic fracture parameters. Engineering Fracture Mechanics. volum 76 (14).
    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. volum 30 (8).
    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. volum 75 (8).
    Academic article
  • 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. volum 1 (4).
    Academic article
  • 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. volum 24 (10).
    Academic article
  • 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. volum 88 (28/29).
    Academic article
  • Lademo, Odd-Geir; Berstad, Torodd; Eriksson, Magnus; Tryland, Tore Helge; Furu, Trond; Hopperstad, Odd Sture; Langseth, Magnus. (2008) A model for process-based crash simulation. International Journal of Impact Engineering. volum 35 (5).
    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. volum 27 (2).
    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. volum 200 (1-3).
    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. volum 35 (5).
    Academic article
  • 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. volum 15 (7).
    Academic article
  • 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. volum 25 (3).
    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. volum 134.
    Academic article
  • 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. volum 134.
    Academic article
  • 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. volum 11.
    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. volum 32 (7).
    Academic article
  • Berstad, Torodd; Furu, Trond; Holmedal, Bjørn; Hopperstad, Odd Sture; Lademo, Odd-Geir; Nes, Erik Aasmund; Pedersen, Ketill Olav. (2005) "FEM and a microstructure based work hardening model used to calculate forming limit curves". International Journal of Forming Processes. volum 8/SI.
    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. volum 32 (1-4).
    Academic article
  • 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. volum 166.
    Academic article
  • Berstad, Torodd; Furu, Trond; Holmedal, Bjørn; Hopperstad, Odd Sture; Lademo, Odd-Geir; Nes, Erik Aasmund; Pedersen, Ketill Olav. (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; Lademo, Odd-Geir; Holmedal, Bjørn; Marthinsen, Knut; Hopperstad, Odd Sture; Nes, Erik Aasmund; Mortensen, D.. (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. volum 80 (6).
    Academic article
  • Lademo, Odd-Geir; Berstad, Torodd; Eriksson, Magnus; Tryland, Tore; Furu, Trond; Hopperstad, Odd Sture; Langseth, Magnus. (2004) "A model for process-based crash simulation". International Journal of Crashworthiness.
    Academic article
  • 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
  • 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
  • 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. volum 22.
    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. volum 22 (6).
    Academic article
  • 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. volum 27 (1).
    Academic article
  • Børvik, Tore; Hopperstad, Odd Sture; Berstad, T; Langseth, Magnus. (2001) Numerical Simulation of Plugging Failure in Ballistic Penetration. International Journal of Solids and Structures. volum 38 (34-35).
    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
  • 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. volum 22.
    Academic article
  • 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. volum 9.
    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. volum 72 (4-5).
    Academic article
  • 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. volum 80-81.
    Academic article

Books

  • Hirsch, J; Holmedal, Bjørn; Nes, Erik Aasmund; Marthinsen, Knut; Engler, Olaf; Abtahi, Shahriar; Schneider, Wolfgang; Grun, G.a.; Hamerton, R.; Ekstrom, Hans Erik; Hurd, T.; Van der Vinden, Menno; Brunger, E.; Pettersen, Tanja; Furu, Trond; Gottstein, Gunter; Jacot, A.; Van houtte, Paul; Saiyi, Li. (2006) Virtual Fabrication of Aluminium Products. John Wiley & Sons. 2006. ISBN 3-527-31363-X.
    Non-fiction book

Part of book/report

  • Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya; Hattori, Kazuhiro; Yamada, Kazuya; Delhaye, Virgile Roger; Nekså, Petter. (2022) Coupled fluid-solid modelling of the valve dynamics in reciprocating compressors. 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants - GL2022 - Proceedings - Trondheim, Norway, June 13-15th 2022.
    Academic chapter/article/Conference paper
  • Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya; Hattori, Kazuhiro; Yamada, Kazuya; Delhaye, Virgile Roger; Nekså, Petter. (2021) Modelling the dynamics of ring plate valves in reciprocating compressors using coupled CFD-FEM simulations. 10th IIR Conference on Compressors and Refrigerants.
    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. 29th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2010) : Shanghai, China, June 6-11, 2010.
    Academic chapter/article/Conference paper
  • Clausen, Arild Holm; Hovden, Martin Thuve; Polanco-Loria, Mario; Berstad, Torodd; Hopperstad, Odd Sture. (2010) Constitutive nodel for thermoplastics - calibration and validation. 19th DYMAT Technical Meeting - Dynamic mechanical behaviour of Polymers and Composites.
    Academic chapter/article/Conference paper
  • Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2009) A Constitutive Model for Thermoplastics Intended for Structural Applications. Proceedings. 7th European LS-DYNA Conference.
    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. Proceedings. 7th European LS-DYNA Conference.
    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. DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Material under Dynamic Loading. Volume 2/2.
    Academic chapter/article/Conference paper
  • Clausen, Arild Holm; Polanco-Loria, Mario A.; Moura, Rafael Traldi; Alves, Marcilio; Berstad, Torodd; Langseth, Magnus; Hopperstad, Odd Sture. (2009) Polymer plates subjected to impact: Experimental tests and numerical simulations. DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Material under Dynamic Loading. Volume 2/2.
    Academic chapter/article/Conference paper
  • Olden, Vigdis; Thaulow, Christian; Berstad, Torodd; Østby, Erling. (2009) Prediction of Hydrogen Embrittlement in 25% CR Duplex Stainless Steel Based on Cohesive Zone Simulation. Proceedings of the ASME 28th International Conference on Ocean, Offshore and Arctic Engineering - OMAE2009.
    Academic chapter/article/Conference paper
  • Dørum, Cato; Dispinar, D; Berstad, Torodd; Hopperstad, Odd Sture. (2008) A probabilistic approach for modelling of fracture in magnesium die-castings. High Tech Die Casting 2008.
    Other
  • Dørum, Cato; Hopperstad, Odd Sture; Berstad, Torodd; Laukli, Hans Ivar. (2008) A probabilistic approach for modelling fracture in die-castings. 8th World Congress on Computational Mechanics, 5th European Congress on Computational Methods in Applied Sciences and Engineering.
    Other
  • Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2008) A Constitutive Model for Thermoplastics in Structural Applications. 21st Nordic Seminar on Computational Mechanics.
    Other
  • Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2008) A modified Boyce-Raghava model for constitutive modelling of thermoplastics. Impact Loading of Lightweight Structures.
    Academic chapter/article/Conference paper
  • 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. IUTAM Symposium on Theoretical, Computational and Modelling Aspects of Inelastic Media.
    Academic chapter/article/Conference paper
  • 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. Fourth national conference on Computational Mechanics.
    Academic chapter/article/Conference paper
  • Berstad, Torodd; Hopperstad, Odd Sture; Clausen, Arild Holm; Ilstad, Håvar; Melve, Bjørn. (2006) Implementation of Constitutive Model for Thermoplastics with some Preliminary Results. 9th International LSDYNA Users Conference 2006.
    Academic chapter/article/Conference paper
  • 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. Virtual Fabrication of Aluminium Products.
    Academic chapter/article/Conference paper
  • 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. The 9th International Conference on Material Forming ESAFORM 2006.
    Academic chapter/article/Conference paper
  • Fjeldbo, Snorre Kjørstad; Holmedal, Bjørn; Lademo, Odd-Geir; Bjerkaas, Hans; Støren, Sigurd; Roven, Hans Jørgen; Hjelen, Jarle; Hopperstad, Odd Sture; Berstad, Torodd; Pedersen, Ketill Olav; Furu, Trond. (2005) A numerical study on the onset of plastic instability in extruded materials with strong through-thickness texture variation. Proceedings of the 8th Esaform conference on material forming, Volume I.
    Academic chapter/article/Conference paper
  • 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. Proceedings of the 8th Esaform conference on material forming, Volume I.
    Academic chapter/article/Conference paper

Report

  • 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. 2005.
    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. 2002.
    Report
  • Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Berstad, Torodd; Langseth, Magnus. (2002) Implementation of a material model for aluminum foam in LS-DYNA. 2002.
    Report

Teaching

Courses

  • KT8305 - Continuum Mechanics

Media

2021

  • Academic lecture
    Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya; Hattori, Kazuhiro; Yamada, Kazuya; Delhaye, Virgile Roger; Nekså, Petter. (2021) Modelling the dynamics of ring plate valves in reciprocating compressors using coupled CFD-FEM simulations. 10th International Conference on Compressors and Coolants . Slovak Association for Cooling and Air Conditioning Tech.; 2021-01-13 - 2021-01-15.
  • Academic lecture
    Færgestad, Rannveig Marie; Holmen, Jens Kristian; Berstad, Torodd; Cardone, Tiziana; Ford, Kevin Anthony; Børvik, Tore. (2021) Modelling and Simulation of Hypervelocity Impacts on Spacecraft in Low Earth Orbit. 13th European LS-DYNA Conference 2021 . DYNAmore GmbH; Ulm. 2021-10-05 - 2021-10-07.

2019

  • Lecture
    Morin, David; Berstad, Torodd; Costas, Miguel; Hopperstad, Odd Sture; Langseth, Magnus. (2019) *MAT_258: A Through-Thickness Regularization Scheme for Shell Element Analyses – Application to Aluminium Components. 12th European LS-DYNA Conference 2019 ; Koblenz. 2019-05-14 - 2019-05-16.
  • Lecture
    Morin, David; Reil, Matthias; Berstad, Torodd; Costas, Miguel; Langseth, Magnus. (2019) Modelling of Steel-Aluminium Components using Structural Adhesive and Self-Piercing Rivets. 12th European LS-DYNA Conference 2019 ; Koblenz. 2019-05-14 - 2019-05-16.

2015

  • Academic lecture
    Tryland, Tore; Berstad, Torodd. (2015) Keep the Material Model simple with input from Elements that predict the Correct Deformation Mode. 10th European LS-DYNA Conference 2015 . DYNAMORE GMBH; Wurthsburg. 2015-06-15 - 2015-06-17.

2012

  • Poster
    Aursand, Eskil; Aursand, Peder Kristian; Berstad, Torodd; Dørum, Cato; Hammer, Morten; Munkejord, Svend Tollak; Nordhagen, Håkon Ottar. (2012) CO2 pipeline integrity: A coupled fluid-structure model using a reference equation of state for CO2. GHGT-11 -- 11th International Conference on Greenhouse Gas Technologies . RITE / IEAGHGT; Kyoto. 2012-11-18 - 2012-11-22.
  • Academic lecture
    Fyllingen, Ørjan; Berstad, Torodd; Langseth, Magnus; Hopperstad, Odd Sture; Tarigopula, Venkatapathi; Schill, Mikael; Bernhardsson, Anders. (2012) On stretch-bending of a high-strength steel component taking into account the forming history. Nordic LS-DYNA Users Forum . Dynamore Nordic AB; Gøteborg. 2012-10-11 - 2012-10-11.
  • Academic lecture
    Nordhagen, Håkon Ottar; Aursand, Peder; Dørum, Cato; Berstad, Torodd; Hammer, Morten; Munkejord, Svend Tollak. (2012) Coupled fluid-structure simulation of running fractures in CO2 pipelines. The Third International Forum on Transportation of CO2 by Pipeline . Tiratsoo Technical; Newcastle Upon Tyme. 2012-06-20 - 2012-06-21.

2011

  • Academic lecture
    Polanco-Loria, Mario A.; Grytten, Frode; Berstad, Torodd; Sørbø, Steinar; Hinrichsen, Einar L. (2011) Numerical simulations of UD-FRC plates: A pin-hole loaded case and ballistic limit predictions. 3th International Conference on Impact Loading of Lightweight Structures . University of Valenciennes; Valenciennes. 2011-06-28 - 2011-07-01.
  • Academic lecture
    Saai, Afaf; Westermann, Ida; Dumoulin, Stephane; Hopperstad, Odd Sture; Berstad, Torodd. (2011) Influence of Microstructure and Texture on the Bendability of AA7108 Aluminium Alloy. ICTP 2011 ; 2011-09-25 - 2011-09-30.

2010

  • Academic lecture
    Holmedal, Bjørn; Hopperstad, Odd Sture; Berstad, Torodd. (2010) Modeling Transients Related to Strain-path Changes. 12th international conference on aluminium alloys (ICAA12) ; 2010-09-05 - 2010-09-09.
  • Poster
    Berstad, Torodd; Dørum, Cato; Jakobsen, Jana Poplsteinova; Kragset, Steinar; Li, Hailong; Lund, Halvor; Morin, Alexandre; Munkejord, Svend Tollak; Mølnvik, Mona J.; Nordhagen, Håkon Ottar; Østby, Erling. (2010) CO2 pipeline integrity: A new evaluation methodology. GHGT-10 – 10th International Conference on Greenhouse Gas Control Technologies . IEAGHGT; Amsterdam. 2010-09-19 - 2010-09-23.
  • Academic lecture
    Clausen, Arild Holm; Hovden, Martin Thuve; Polanco-Loria, Mario A.; Berstad, Torodd; Hopperstad, Odd Sture. (2010) A Constitutive Model for Thermoplastics with some Applications. IMPLAST (International Symposium on Plasticity and Impact Mechanics ; 2010-10-12 - 2010-10-14.
  • Academic lecture
    Clausen, Arild Holm; Hovden, Martin Thuve; Polanco-Loria, Mario A.; Berstad, Torodd; Hopperstad, Odd Sture. (2010) Constitutive model for thermoplastics - Calibration and validation. 19th DYMAT Technical Meeting ; Strasburg. 2010-12-01 - 2010-12-03.
  • Academic lecture
    Nordhagen, Håkon Ottar; Berstad, Torodd; Dørum, Cato; Kragset, Steinar; Lund, Halvor; Morin, Alexandre; Munkejord, Svend Tollak; Østby, Erling. (2010) Simulering av løpende brudd i rørledninger med høyt trykk. NPF, Offshore rørledninger/stigerør . NPF; Trondheim. 2010-10-19 - 2010-10-20.

2009

  • Poster
    Chen, Yan; Hopperstad, Odd Sture; Clausen, Arild Holm; Børvik, Tore; Berstad, Torodd. (2009) Finite element analyses of Charpy tests on extruded aluminium alloys. DYMAT 2009 ; Brussel. 2009-09-07 - 2009-09-11.
  • Academic lecture
    Clausen, Arild Holm; Moura, Rafael Traldi; Alves, Marcilio; Langseth, Magnus; Polanco-Loria, Mario; Berstad, Torodd; Hopperstad, Odd Sture. (2009) Impact of PEHD plates: Experimental tests and numerical simulations. COBEM 2009 ; Gramado. 2009-11-15 - 2009-11-20.
  • Academic lecture
    Clausen, Arild Holm; Polanco-Loria, Mario; Moura, Rafael Traldi; Alves, Marcilio; Berstad, Torodd; Langseth, Magnus; Hopperstad, Odd Sture. (2009) Polymer plates subjected to impact: Experimental tests and numerical simulations. DYMAT 2009 ; Brussel. 2009-09-07 - 2009-09-11.
  • Poster
    Delhaye, Virgile Roger; Polanco-Loria, Mario; Berstad, Torodd; Clausen, Arild Holm; Hopperstad, Odd Sture; Moussy, Francois; Othman, Ramzi. (2009) Characterization and numerical modelling of a polypropylene material applied in the automotive industry. DYFP 2009 ; Rolduc, Kerkrade. 2009-04-05 - 2009-04-09.
  • Academic lecture
    Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2009) A Constitutive Model for Thermoplastics Intended for Structural Applications. 7th European LS-DYNA Conference ; Salzburg. 2009-05-14 - 2009-05-15.
  • Poster
    Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2009) A constitutive model for thermoplastics in structural applications. DYFP 2009 ; Rolduc, Kerkrade. 2009-04-05 - 2009-04-09.

2008

  • Academic lecture
    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. IUTAM Symposium on Theoretical, Computational and Modelling Aspects of Inelastic Media ; 2008-01-14 - 2008-01-18.
  • Academic lecture
    Dørum, Cato; Dispinar, D; Berstad, Torodd; Hopperstad, Odd Sture. (2008) A probabilistic approach for modelling of fracture in magnesium die-castings. High Tech Die Casting 2008 ; 2008-04-09 - 2008-04-10.
  • Academic lecture
    Dørum, Cato; Hopperstad, Odd Sture; Berstad, Torodd; Laukli, Hans Ivar. (2008) A probabilistic approach for modelling fracture in die-castings. 8th World Congress on Computational Mechanics, 5th European Congress on Computational Methods in Applied Sciences ; 2008-06-30 - 2008-07-04.
  • Academic lecture
    Dørum, Cato; Østby, Erling; Berstad, Torodd; Popescu, Mihaela; Thaulow, Christian. (2008) Numerical simulation of crack-arrest in high pressure pipelines. 8th International Welding Symposium ; Kyoto. 2008-11-16 - 2008-11-18.
  • Academic lecture
    Olden, Vigdis; Thaulow, Christian; Johnsen, Roy; Østby, Erling; Berstad, Torodd; Nyhus, Bård. (2008) Influence of hydrogen from CP on the fracture susceptibility of 25% Cr duplex stainless steel - FE modeling of constant load testing using hydrogen influenced cohesive zone elements. ISOPE 2008 ; Vancouver. 2008-07-06 - 2008-07-11.
  • Academic lecture
    Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2008) A Constitutive Model for Thermoplastics in Structural Applications. 21st Nordic Seminar on Computational Mechanics ; 2008-10-16 - 2008-10-17.
  • Academic lecture
    Polanco-Loria, Mario; Clausen, Arild Holm; Berstad, Torodd; Hopperstad, Odd Sture. (2008) A modified Boyce-Raghava model for constitutive modelling of thermoplastics. International Conference on Impact Loading of Lightweight Structures . SIMLab, Centre of Research-based Innovation, NTNU; Trondheim. 2008-06-17 - 2008-06-19.

2007

  • Academic lecture
    Clausen, Arild Holm; Hopperstad, Odd Sture; Berstad, Torodd; Ilstad, Håvar; Melve, Bjørn. (2007) Modelling of thermoplastics: State-of-the-art and challenges. Materials Modeling - FEA Simulations of the Behaviour of Modern Industrial Materials Including their Failure . NAFEMS; 2007-03-20 - 2007-03-21.
  • Academic lecture
    Hopperstad, Odd Sture; Berstad, Torodd; Lademo, Odd-Geir; Langseth, Magnus. (2007) Modelling of material behaviour and fracture for aluminium alloys with applications to plastic forming and crashworthiness. 6th European LS-DYNA Users’ Conference ; Göteborg. 2007-05-29 - 2007-05-30.
  • Academic lecture
    Hopperstad, Odd Sture; Børvik, Tore; Berstad, Torodd; Lademo, Odd-Geir; Benallal, Ahmed. (2007) Simulation of the Portevin-Le Chatelier effect and plastic instability in aluminium alloys. Instabilities across the Scales (IAS07) . Delft University of Technology; Delft. 2007-07-02 - 2007-07-05.

2006

  • Poster
    Hopperstad, Odd Sture; Børvik, Tore; Berstad, Torodd; Benallal, Ahmed. (2006) Finite element simulations of the Portevin-Le Chatelier effect in aluminium alloy. 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading ; Dijon. 2006-09-11 - 2006-09-15.
  • Academic lecture
    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. The 9th International Conference on Material Formaing ESAFORM 2006 ; Glasgow. 2006-04-26 - 2006-04-28.

2004

  • Academic lecture
    Berstad, Torodd; Furu, Trond; Holmedal, Bjørn; Hopperstad, Odd Sture; Lademo, Odd-Geir; Nes, Erik Aasmund; Pedersen, Ketill Olav. (2004) FEM and a microstructure based work hardening model used to calculate forming limit curves. ESAFORM ; Trondheim. 2004-04-28 - 2004-04-30.
  • Academic lecture
    Berstad, Torodd; Lademo, Odd-Geir; Hopperstad, Odd Sture; Langseth, Magnus. (2004) Formability modeling with LA-DYNA". 8th International LS-Dyna User's Conference ; Detroit. 2004-05-03 - 2004-05-05.
  • Academic lecture
    Lademo, Odd-Geir; Berstad, Torodd; Hopperstad, Odd Sture; Tryland, Tore; Furu, Trond; Langseth, Magnus. (2004) A model for process-based crash simulations. 8th International LS-DYNA User's Conference ; Detroit. 2004-05-03 - 2004-05-05.
  • Academic lecture
    Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Berstad, Torodd; Langseth, Magnus. (2004) Implementation of a constitutive model for aluminum foam including fracture and statistical variation of density. 8th LS-DYNA International Users Conference . LS-DYNA; Detroit. 2004-05-02 - 2004-05-04.
  • Academic lecture
    Tryland, Tore; Lademo, Odd-Geir; Berstad, Torodd; Hopperstad, Odd Sture; Langseth, Magnus; Furu, Trond. (2004) Process based simulations of an aluminium bumper system. Int. Symposium Crashworthiness of Light-weight Automotive Structures ; Trondheim. 2004-06-17 - 2004-06-18.

2003

  • Academic lecture
    Benallal, Ahmed; Berstad, Torodd; Børvik, Tore; Clausen, Arild Holm; Hopperstad, Odd Sture. (2003) On the Effect of Negative Strain-Rate Sensitivity on the Behaviour of Aluminium Alloy 5083-H116. 5th Euromech Solid Mechanics Conference . [Mangler data]; Thessaloniki, Hellas. 2003-08-22.
  • Academic lecture
    Clausen, Arild Holm; Oppedal, Henning; Berstad, Torodd. (2003) FEM Simulations of a Split-Hopkinson Tension Bar. 16th Nordic Seminar on Computational Mechanics . [Mangler data]; Trondheim, Norge. 2003-10-18.

2002

  • Academic lecture
    Hopperstad, Odd Sture; Berstad, Torodd; Lademo, Odd-Geir; Reyes, Aase Gavina Roberg; Langseth, Magnus; Hanssen, Arve Grønsund. (2002) Modelling of the behaviour and failure of aluminium alloys and foams. CrashMAT 2002 . [Mangler data]; Freiburg. 2002-04-16.
  • Academic lecture
    Lademo, Odd-Geir; Hopperstad, Odd Sture; Berstad, Torodd; Langseth, Magnus. (2002) Modelling of aluminium for crashworthiness analyses. Nordic LS-DYNA Users Conferende . [Mangler data]; Gotenburg, Sweden. 2002-09-17.

2001

  • Academic lecture
    Lademo, Odd-Geir; Hopperstad, Odd Sture; Berstad, T; Langseth, Magnus. (2001) Numerical Simulations of Ductile Failure in Extruded Aluminium Alloys Using a Coupled Model of Elastoplasticity and Damage. Third European LS-DYNA Conference . [Mangler data]; Paris, France. 2001-06-19.

1995

  • Academic lecture
    Berstad, Torodd; Langseth, Magnus; Hopperstad, Odd Sture. (1995) Crashworthiness of thin-walled aluminium extrusions. 4th International Conference on Computational Plasticity . [Mangler data]; [Mangler data].

1994

  • Academic lecture
    Berstad, Torodd; Hopperstad, Odd Sture; Langseth, Magnus. (1994) Elasto-viscoplastic constitutive models in the explicit finite element code LS-DYNA3D. 2nd International LS-DYNA3D Conference . [Mangler data]; [Mangler data].
  • Academic lecture
    Langseth, Magnus; Berstad, Torodd; Hopperstad, Odd Sture; Clausen, Arild Holm. (1994) Energy absorption in axially loaded square thin-walled aluminium extrusions. 3rd International Conference on Structures Under Shock and Impact . [Mangler data]; [Mangler data].
  • Academic lecture
    Langseth, Magnus; Hopperstad, Odd Sture; Berstad, Torodd. (1994) Energy absorption in axially loaded square thin-walled aluminium extrusions. 7th Nordic Seminar on Computational Mechanics . [Mangler data]; [Mangler data].

1993

  • Academic lecture
    Langseth, Magnus; Berstad, Torodd; Larsen, Per Kristian. (1993) Impact loading of plates : a comparison between numerical simulations and experimental results. International Symposium on the Interaction of Nonnuclear Munitions withStructures (6 : 1993 : Panama City Beach, Fla.) . [Mangler data]; [Mangler data].
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