Blar i NTNU Open på tittel
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Fatigue crack initiation in corroded offshore mooring chains
(Doctoral theses at NTNU;2022:296, Doctoral thesis, 2022)Mooring chains on floating offshore structures suffer from combined degradation from corrosion and fatigue. Corrosion reduces cross-sectional areas of the chains and creates surface pits. During cyclic loading of the chains, ... -
Fatigue crack propagation prediction of a pressure vessel mild steel based on a strain energy density model
(Journal article; Peer reviewed, 2017)Fatigue crack growth (FCG) rates have traditionally been formulated from fracture mechanics, whereas fatigue crack initiation has been empirically described using stress-life or strain-life methods. More recently, there ... -
Fatigue Crack Rrowth Simulation Using xEtended Finite Element Method
(Master thesis, 2013)Fatigue crack growth analysis of offshore structure is concerned by the industry because it?s economical and practical to increasing the usage life of the strucutre by extend it?s fatigue life. S-N approachs are the most ... -
Fatigue Damage Comparison of Mechanical Components in a Land-based and a Spar Floating Wind Turbine
(Journal article; Peer reviewed, 2015)This paper investigates the fatigue damage of the gears and bearings in a land-based and a spar-type floating wind turbine. The reference 5 MW NOWITECH gearbox is used on a land-based and a floating spar wind turbine. ... -
Fatigue damage in an offshore wind turbine using probability density evolution
(Master thesis, 2017)Due to large variability of the offshore environment, the load analysis of an offshore wind turbine is a complex task. It is normally performed in the time domain, by running Monte Carlo simulations. However, this is usually ... -
Fatigue Damage on Offshore Wind Turbines by a Cell Mapping Method
(Journal article; Peer reviewed, 2018)Due to large variability of the offshore environment, the load analysis of an offshore wind turbine is a complex task. It is normally performed in the time domain, by running stochastic simulations. This is usually very ... -
Fatigue Design Appropriations for Floating Offshore Wind Turbine Support Structures
(Master thesis, 2023)Flytende havvindturbiner (FOWT) utvikles for å utvide vindkraftproduksjonen til områder langt fra kysten og i dypere farvann. Ved å bruke erfaringen fra olje- og gassindustrien innen offshorestrukturer, kan FOWT-design dra ... -
Fatigue design for metallic components produced by additive manufacturing
(Doctoral theses at NTNU;2021:25, Doctoral thesis, 2021)Additive manufacturing is a fast-rising manufacturing that brings new possibilities in terms of what has previously been possible in manufacturing. Additive manufacturing is a computer-controlled process where the material ... -
Fatigue Design of Cables for Energy Transport
(Master thesis, 2020)Under vann brukes strømkabler til å distribuere strøm til offshoreinstallasjoner. Strømkablene består av innvendige strømledere som er beskyttet av flere lag med materiale. Ekstruderte blyhylser fungerer som et beskyttende ... -
Fatigue Design of Hydraulic Turbine Runners
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:19, Doctoral thesis, 2005)Turbine runners experience start-stop cycles and vibration cycles. Cracks initiated from service or manufacturing defects and propagated by start-stop cycles become critical when the stress intensity range due to vibrational ... -
Fatigue design sensitivities of large monopile offshore wind turbines
(Peer reviewed; Journal article, 2022)The input for fatigue analyses of offshore wind turbines is typically chosen based on design values provided by design standards. While this provides a straightforward design methodology, the contribution of different input ... -
Fatigue Estimation of Offshore Structure by Monitored Data and Machine Learning
(Master thesis, 2022)Som en konsekvens av at et økende antall offshore-plattformer passerer sin initielt tiltenkte levetid, er utmattingssvikt ansvarlig for et betydelig antall reparasjoner i Nordsjøen. I løpet av de siste årene har ... -
Fatigue evaluation of notched Al-Si-10Mg produced by SLM
(Master thesis, 2019)I dette arbeidet undersøkes hakkeffekten av additivt produsert Al-Si-10Mg. En forståelse av teorien er utviklet gjennom en litteraturvurdering med fokus på produksjonsprosessen, legeringsegenskaper, tretthet og varmebehandling. ... -
Fatigue Following Pediatric Acquired Brain Injury: Interplay With Associated Factors in a Clinical Trial Population Compared to Healthy Controls
(Peer reviewed; Journal article, 2021)Objective: The aims of the present study were to compare fatigue levels in children with pediatric acquired brain injury (pABI) with healthy controls (HCs), and examine the interplay of fatigue with associated factors. ... -
Fatigue in cancer treatment - assessment, course and etiology
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:138, Doctoral thesis, 2007)Aims. The major aims of the present work were to increase the understanding of cancer related fatigue with respect to assessment methodology, frequency and possible etiology. The validity of two fatigue instruments was ... -
Fatigue in Jacket Structures With Impaired Integrity
(Master thesis, 2012)Present regulations for offshore structures on the Norwegian continental shelf havea requirement for Accidental Limit State redundancy and Fatigue Limit State redundancyin a damaged state. However, the requirement is far ... -
Fatigue in Timber: A State of the Art Review, Modeling Investigations, and Fatigue Tests of Glued Laminated Timber in Shear
(Master thesis, 2020)Mengden av forskning på utmatting av tre er sparsom, noe som speiles i omfanget av de eksisterende dimensjoneringsreglene. Nye byggeprodukt av tre og følgelig større trestrukturer og -mengder gjør utvidelse av forskningsresultater ... -
Fatigue in young adults with juvenile idiopathic arthritis 18 years after disease onset: data from the prospective Nordic JIA cohort
(Journal article; Peer reviewed, 2021)Background: To study fatigue in young adults with juvenile idiopathic arthritis (JIA) 18 years after disease onset, and to compare with controls. Methods: Consecutive children with onset of JIA between 1997 and 2000, from ... -
Fatigue investigation of complex weldments by the means of the local strain energy density approach
(Journal article; Peer reviewed, 2018)The paper investigates the use of an energetic approach based on the strain energy density failure criteria to predict the fatigue life of welded joints in aluminum alloy. The cited criterion has already been proved valid ... -
Fatigue life assessment for a welded detail: advantages of a local energetic approach and experimental validation
(Journal article; Peer reviewed, 2018)In modern civil buildings, as well as in mechanical and naval constructions, welding is a widely diffused technological process. The fatigue assessment, as design or verification procedure, of a welded joint to evaluate ...