Browsing NTNU Open by Author "Skallerud, Bjørn Helge"
Now showing items 1-20 of 34
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3D patient-specific numerical modeling of the soft palate considering adhesion from the tongue
Liu, Hongliang; Prot, Victorien Emile; Skallerud, Bjørn Helge (Journal article; Peer reviewed, 2018)Collapse of the soft palate in the upper airway contributes to obstructive sleeping apnea (OSA). In this study, we investigate the influence of the adhesion from the tongue on the soft palate global response. This is ... -
A gradient-based multiaxial criterion for fatigue crack initiation prediction in components with surface roughness
Skallerud, Bjørn Helge; Ås, Sigmund Kyrre; Ottosen, Niels S. (Journal article, 2018)The current study presents methods to predict the governing crack initiation site and fatigue crack initiation life of components with surface roughness. The surface topography is measured with white light interferometry ... -
Abaqus explicit procedure to describe OPB behaviour in Mooring lines
Utklev, Jens Christian (Master thesis, 2015)The procedure use data from model tests as input and calculate the local OPB stress field. -
Adiponectin reduces bone stiffness; verified in a 3D artificial human bone model in vitro
Haugen, Sigrid; He, Jianying; Sundaresan, Alamelu; Stunes, Astrid Kamilla; Aasarød, Kristin Matre; Tiainen, Hanna; Syversen, Unni; Skallerud, Bjørn Helge; Reseland, Janne Elin (Journal article; Peer reviewed, 2018)Primary human osteoblasts and osteoclasts incubated in a rotating coculture system without any scaffolding material, form bone-like tissue that may be used to evaluate effects of various compounds on mechanical strength. ... -
An experimental and numerical study on the volume change of particle-filled elastomers in various loading modes
Ilseng, Arne; Skallerud, Bjørn Helge; Clausen, Arild Holm (Journal article; Peer reviewed, 2017)Laboratory tests show that there is a pronounced difference in the volumetric response between uniaxial tension and confined axial compression loading for commercial particle-filled hydrogenated nitrile butadiene rubber ... -
Buckling initiation in layered hydrogels during transient swelling
Ilseng, Arne; Prot, Victorien Emile; Skallerud, Bjørn Helge; Stokke, Bjørn Torger (Journal article; Peer reviewed, 2019)Subjected to compressive stresses, soft polymers with stiffness gradients can display various buckling patterns. These compressive stresses can have different origins, like mechanical forces, temperature changes, or, for ... -
Crystal plasticity modeling of microstructure influence on fatigue crack initiation in extruded Al6082-T6 with surface irregularities
Hallberg, Håkan; Ås, Sigmund Kyrre; Skallerud, Bjørn Helge (Journal article, 2018)The influence of surface roughness and microstructure heterogeneities in the vicinity of macroscopic stress concentrations are investigated by crystal plasticity simulations. It is shown that in the extruded Al6082-T6 alloy ... -
Cyclic behavior and strain energy-based fatigue damage analysis of mooring chains high strength steel
P. Zarandi, Ershad; Skallerud, Bjørn Helge (Peer reviewed; Journal article, 2020)This study investigates the low-cycle fatigue behavior of mooring chains high-strength steel grade R4 under different strain amplitudes and strain ratios at room temperature. A fatigue test program has been carried out on ... -
Digital image correlation for continuous mapping of fatigue crack initiation sites on corroded surface from offshore mooring chain
Qvale, Paul; P. Zarandi, Ershad; Ås, Sigmund Kyrre; Skallerud, Bjørn Helge (Peer reviewed; Journal article, 2021)The full-field digital image correlation (DIC) technique was used to identify crack initiation and early crack growth on irregular, corroded surfaces from offshore mooring chain. Finite element analysis was paired with the ... -
Donnan Contribution and Specific Ion Effects in Swelling of Cationic Hydrogels are Additive: Combined High-Resolution Experiments and Finite Element Modeling
Zurzul, Natasa; Ilseng, Arne; Prot, Victorien Emile; Sveinsson, Hrafn Mar; Skallerud, Bjørn Helge; Stokke, Bjørn Torger (Journal article; Peer reviewed, 2020)Finite element modeling applied to analyze experimentally determined hydrogel swelling data provides quantitative description of the hydrogel in the aqueous solutions with well-defined ionic content and environmental ... -
Eksperimentelle og mekaniske undersøkelser av stivhet og styrke i lårben fra mus
Hessevik, Magnus (Master thesis, 2013)Denne oppgaven er en del av et prosjekt som bruker lårben fra mus til å undersøke hvordan benkvaliteten påvirkes med forskjellige genegiske modifiseringer og medisineringer. Forberedelser, behandling av benprøver og oppsett ... -
Enabling Sequential Rupture for Lowering Atomistic Ice Adhesion
Xiao, Senbo; Skallerud, Bjørn Helge; Wang, Feng; Zhang, Zhiliang; He, Jianying (Journal article; Peer reviewed, 2019)State-of-the-art passive icephobicity relies mainly on static parameters such as surface energy, coating elastic modulus, crack sizes and so on. Low ice adhesion resulting from dynamic de-icing process, for instance ice ... -
Experimental and numerical study of mooring chain residual stresses and implications for fatigue life
P. Zarandi, Ershad; Skallerud, Bjørn Helge (Peer reviewed; Journal article, 2020)Residual stresses in large mooring chains were measured for the first time in this study. Two measurement techniques were employed (neutron diffraction and hole drilling). Elastic-plastic finite element simulation of the ... -
Finite Element Approach to Estimating Shell Properties of Nanoparticle-stabilized Microbubbles
Morton, Daniel Thor (Master thesis, 2016)The application of nanoparticle-stabilized microbubbles (NP-MBs) for localized drug delivery is a new and promising method for enhancing the effectiveness of administered drugs. The NP-MBs move through the vascular system ... -
Fluid structure interaction aspects in obstructive sleep apnea patients
Hole, Øyvind (Master thesis, 2017)In this master thesis, a comparative study of the feasibility of fluid-structure interaction (FSI) tools has been done in light of simulating the problem of obstructive-sleep apnea (OSA). Part of the study has been done ... -
Grain-size Induced Strengthening and Weakening of Dislocation-free Polycrystalline Gas Hydrates
Wu, Jianyang; Skallerud, Bjørn Helge; He, Jianying; Zhang, Zhiliang (Journal article; Peer reviewed, 2017)Sediment-hosted gas hydrates have profound impacts on global energy sources and climate change. Their mechanical properties play a crucial role in gas recovery and understanding their evolution in nature, however, the ... -
Mechanical behaviour of particlefilled elastomers at various temperatures: An experimental and numerical study
Ilseng, Arne (Doctoral theses at NTNU;2016:295, Doctoral thesis, 2016)Numerical tools that facilitate predictions of the mechanical behaviour of elastomeric products exposed to various temperatures have great cost saving potentials in multiple industries. To unleash these potentials, precise ... -
Mechanical instability of monocrystalline and polycrystalline methane hydrates
Wu, Jianyang; Ning, Fulong; Trinh, Thuat; Kjelstrup, Signe; Vlugt, Thijs J.H.; He, Jianying; Skallerud, Bjørn Helge; Zhang, Zhiliang (Journal article; Peer reviewed, 2015)Despite observations of massive methane release and geohazards associated with gas hydrate instability in nature, as well as ductile flow accompanying hydrate dissociation in artificial polycrystalline methane hydrates ... -
MekIT’17 - Ninth national conference on Computational Mechanics
Skallerud, Bjørn Helge; Andersson, Helge Ingolf (Book, 2017) -
Mode I stress intensity factors for semi-elliptical fatigue cracks in curved round bars
Aursand, Mads; Skallerud, Bjørn Helge (Peer reviewed; Journal article, 2021)Some cyclically loaded components such as mooring chains can develop fatigue cracks in locations where the shape of the part is equivalent to that of a curved or bent round bar. Here we consider a semi-elliptical crack ...