Blar i NTNU Open på forfatter "Børvik, Tore"
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Calibration of the modified Mohr-Coulomb fracture model by use of localization analyses for three tempers of an AA6016 aluminium alloy
Granum, Henrik; Morin, David; Børvik, Tore; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2021)This paper presents a novel calibration procedure of the modified Mohr-Coulomb (MMC) fracture model by use of localization analyses and applies it for three tempers of an AA6016 aluminium alloy. The localization analyses ... -
Combined three-point bending and axial tension of pressurised and unpressurised X65 offshore steel pipes – Experiments and simulations
Kristoffersen, Martin; Langseth, Magnus; Børvik, Tore (Journal article; Peer reviewed, 2018)Subsea pipelines are occasionally struck and hooked by objects such as anchors or trawl gear. The initial denting, followed by potential hooking and displacement of the pipeline, give rise to a complex load and deformation ... -
Comparing In Situ DIC Results from an Etched Surface with a Gold Speckled Surface
Paulsen, Christian Oen; Fagerholt, Egil; Børvik, Tore; Westermann, Ida (Journal article; Peer reviewed, 2019)A ferrite-pearlite two-phase steel was investigated using in situ scanning electron microscope (SEM) tensile testing combined with digital image correlation (DIC). Two different speckled patterns were used and compared. ... -
Constitutive modeling of a graded porous polymer based on X-ray computed tomography
Vestrum, Ole; Dæhli, Lars Edvard Blystad; Hopperstad, Odd Sture; Børvik, Tore (Peer reviewed; Journal article, 2020)This work focuses on the constitutive modeling of a graded porous polymer pipeline coating based on X-ray micro computed tomography (XRMCT). Previous work has revealed that finite element (FE) models generated from XRMCT ... -
Coupled finite element-discrete element method (FEM/DEM) for modelling hypervelocity impacts
Færgestad, Rannveig Marie; Holmen, Jens Kristian; Berstad, Torodd; Cardone, Tiziana; Ford, Kevin Anthony; Børvik, Tore (Peer reviewed; Journal article, 2022)Hypervelocity impacts (HVIs) from orbital debris are an increasing threat to current and future missions in low Earth orbit, making spacecraft shielding vital for future space exploration efforts. A debris shield is a ... -
Crack propagation in aluminium alloy plates: experiments, modelling and simulation
Blytt, Aslak Magdalon; Sundt, Sander (Master thesis, 2021)Denne masteroppgaven har studert sprekkpropagering i 1.5mm tykke plater av aluminiumslegeringen AA6016 utsatt for kvasisstatisk- og dynamisk last. Forsøkene har blitt modellert ved bruk av en FEA og en Gurson-Tvergaard-needleman ... -
Cylindrical cavity expansion approximations using different constitutive models for the target material
Johnsen, Joakim; Holmen, Jens Kristian; Warren, Thomas L.; Børvik, Tore (Journal article; Peer reviewed, 2017)In this article, we investigate the results obtained using different constitutive models for the solution of the cylindrical cavity expansion problem under plane strain conditions. The cylindrical cavity expansion solutions ... -
Damage and Failure in an X65 Steel Pipeline Caused by Trawl Gear Impact
Kristoffersen, Martin; Børvik, Tore; Langseth, Magnus; Hopperstad, Odd Sture; Ilstad, Håvar; Levold, Erik (Chapter, 2013)Offshore pipelines subjected to accidental impact loads from trawl gear or anchors may experience large global deformations and large local strains, creating a complex stress and strain history. In this study experiments ... -
Deformasjon av trykksatte rørledninger
Jakobsen, Espen (Master thesis, 2013)Offshore pipelines may be subjected to impact by anchor and trawl gear. An anchor impact will drag the pipeline out of its position, before it is released and the pipe straightens, due to the rebound and large axialforces. ... -
Deformation and Fracture of Impulsively Loaded Sandwich Panels
Wadley, Haydn N.G.; Børvik, Tore; Olovsson, Lars; Wetzel, J.J.; Dharmasena, Kumar P.; Hopperstad, Odd Sture; Deshpande, Vikram; Hutchinson, J.W. (Journal article; Peer reviewed, 2013)Light metal sandwich panel structures with cellular cores have attracted interest for multifunctional applications which exploit their high bend strength and impact energy absorption. This concept has been explored here ... -
Denting of coated and uncoated offshore steel pipes
Holm, Nicolay Line; Røshol, Eivind Torgunrud (Master thesis, 2015)In the present thesis, numerical and experimental investigations of coated offshore pipelines were conducted. The objective was to investigate how the polypropylene coating affected the global response of the pipes. The ... -
Design and Modeling of Vehicle Security Barriers
Sandvoll, Sigurd Vattekar; Stensvand, Ola Fjelltun (Master thesis, 2021) -
Discrete modeling of low-velocity penetration in sand
Holmen, Jens Kristian; Olovsson, Lars; Børvik, Tore (Journal article; Peer reviewed, 2017)In this paper, a discrete particle method was evaluated and used in numerical simulations of low-velocity penetration in sand. Hemispherical, blunt, and ogival-nosed impactors were tested at striking velocities below 5 ... -
Docol 600 DL Steel Plates Subjected to Blast Loading: Numerical Simulations and Experimental Validation
Heggelund, Solveig (Master thesis, 2014)The main objective in this thesis is to further investigate the accuracy of the accumulated blast impulse and plate response employing this method, and comparing the results with performed experiments. Experiments were ... -
Ductile failure of aluminium plates: experiments, modelling and simulations
Espeseth, Vetle (Doctoral theses at NTNU;2023:65, Doctoral thesis, 2023)Numerical models and simulations are valuable tools to aid engineers in the design of products and structures and can help reduce the number of costly and time-consuming experiments needed. The modelling of ductile material ... -
Ductile failure predictions using micromechanically-based computational models
Dæhli, Lars Edvard Blystad; Tekoglu, Cihan; Morin, David; Børvik, Tore; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2022)Three different micromechanically-based computational models for fracture in porous ductile solids are compared and assessed. Model A is a unit cell model of a porous ductile solid comprising a uniform periodic distribution ... -
Ductile fracture of aluminium alloys in the low to moderate stress triaxiality range
Tomstad, Asle Joachim (Doctoral theses at NTNU;2022:150, Doctoral thesis, 2022)This thesis investigates the effect of constituent particles on ductile fracture in 6000-series aluminium alloys in the low to moderate stress triaxiality range. In Part 1, tension tests on smooth and notched specimens ... -
Ductile-Brittle Transition in Offshore Steel
Hellum, Gry Myrmo (Master thesis, 2017)The main objective of this thesis was to investigate experimentally and numerically the main effects and interaction effects of temperature, strain rate and stress triaxiality on an offshore X65 steel. During preliminary ... -
Dynamic Behaviour of a High-Strength Structural Steel at Low Temperatures
Perez-Martin, Maria Jesus; Holmen, Jens Kristian; Thomesen, Susanne; Hopperstad, Odd Sture; Børvik, Tore (Journal article; Peer reviewed, 2019)The main objective of this experimental study is to determine the effect of low temperatures on the mechanical behaviour of Strenx 960 Plus high-strength structural steel at different strain rates and stress triaxialities. ... -
Dynamic versus quasi-static loading of X65 offshore steel pipes
Kristoffersen, Martin; Børvik, Tore; Langseth, Magnus; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2016)Anchors or trawl gear occasionally impact offshore pipelines, resulting in large local and global deformations. Impact velocities are typically less than 5 m/s, but local strain rates may be very high. In this study strain ...