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The fate of hydrocarbon leaks from plugged and abandoned wells by means of natural seepages
(Peer reviewed; Journal article, 2020-10)When a well reaches the end of its productive life, it is permanently plugged and abandoned. Even though new technology and verification methods are being evaluated, it is evident that operational, barrier material and ... -
Fate of persistent organic pollutants during anaerobic treatment and production of biopellets
(Masteroppgave/UIS-TN-IMN/2012;, Master thesis, 2012)Treatment of municipal wastewater produces large quantities of sludge that represents a cost for the individual wastewater treatment plant. Proper sludge treatment enables reuse of sludge, possibly as fertilizers. Fertilizer ... -
Fatigue Analysis in Topside Pipe Systems Offshore
(Master thesis, 2021)Safety and reliability are terms generally associated with offshore oil and gas industry, particularly regarding piping where failure could potentially cause catastrophic outcomes. Hence, codes and standards have been ... -
Fatigue Analysis of Inter-Array Power Cables between Two Floating Offshore Wind Turbines Including a Simplified Method to Estimate Stress Factors
(Peer reviewed; Journal article, 2023-06)The use of floating offshore wind farms for electrical energy supply is expected to rise significantly over the coming years. Suspended inter-array power cables are a new design to connect floating offshore wind turbines ... -
Fatigue analysis of offshore piping systems
(Masteroppgave/UIS-TN-IKM/2012;, Master thesis, 2012)Oil and gas fields located in offshore are today being developed in even harsher and more challenging environments than anyone had thought of before. New designs, technologies, regulations and requirements have been developed ... -
Fatigue analysis of offshore wind turbine
(Masteroppgave/UIS-TN-IKM/2012;, Master thesis, 2012)In this master thesis analyses will be conducted on a 5MW offshore wind turbine, with a jacket foundation. The goal is to investigate how seven different wind profiles affect fatigue in the blade root, the tower top and ... -
Fatigue assessment of offshore jacket structures: A case study
(Masteroppgave/UIS-TN-IMBM/2018;, Master thesis, 2018-06-15)Offshore fixed jacket structures are vulnerable to fatigue damage from hazardous environment in North Sea. In this thesis, an offshore jacket structure was checked for the ULS 100- year return period of wave and checked ... -
Fatigue design challenges: Recent linear and nonlinear models
(Peer reviewed; Journal article, 2019)Reliable fatigue design rules affect the proactive identification of safety parameters in engineering structures. Numerous fatigue crack initiation and propagation models, linear and nonlinear, have been developed for ... -
Fatigue life analysis of wheel-rail contacts at railway turnouts using finite element modelling approach
(Peer reviewed; Journal article, 2021)The article deals with wheel-rail contact analysis at railway turnout using a finite element modelling approach. The focus is understanding the wheel-rail contact problems and finding the means of reducing these problems ... -
Fatigue life assessment of a steel bridge based on measured corrosion wastage and actual traffic loading
(Master thesis, 2022)Most steel bridge failures and collapses demonstrate that environmental influences substantially impact the structural integrity of steel bridges. Fatigue and corrosion have been recognized as the primary aging processes ... -
Fatigue Life Assessment of Rib to Deck Welded Joint of the Hardanger Bridge – a Realistic Traffic Loading of FEM
(Master thesis, 2022)The orthotropic steel decks in the Hardanger Bridge, as is common for long span suspension bridges, have welded joints that are susceptible to fatigue cracks. The rib-to-deck welded joints under the wheel load are the most ... -
Fatigue life estimation of existing steel structures under time-dependent structural degradation
(Masteroppgave/UIS-TN-IKM/2014;, Master thesis, 2014-06-30)The purpose of this thesis is to present a method to estimate remaining fatigue life of steel bridge members subjected to time-dependent corrosion. This method contributes to the further development of the theoretical ... -
Fatigue life estimation of tubular joints in offshore jacket according to the SCFs in DNV-RP-C203, with comparison of the SCFs in ABAQUS/CAE
(Master thesis, 2014-06-13)Mostly offshore platform installed in shallow water, less than 300 meters for drilling and production of oil and/or gas are normally fixed to seabed and constructed as truss framework with tubular members as structure ... -
Fatigue of service pipes
(Masteroppgave/UIS-TN-IKM/2012;, Master thesis, 2012)The first part of this thesis will present the principle of fatigue, vibration and damping of service pipes on the Norwegian continental shelf. Thus us used for the creation of a screening methodology for prioritizing ... -
Fatigue of Structural and Additively Manufactured Steels: Damage Assessment and Modelling Techniques
(PhD thesis UiS;, Doctoral thesis, 2022-09)The topics of damage assessment by in situ measurements before a macroscopic crack has been initiated, nonlinear damage modelling and additive manufacturing are herein discussed and researched from the perspective of the ... -
Fatigue reliability assessment of ageing railway truss bridges: Rationality of probabilistic stress-life approach
(Journal article; Peer reviewed, 2016-05)Rail authorities all over the world are paying attention to extend the service lives of railway bridges. The famous Miner’s rule employed deterministic or probabilistic fatigue assessment approaches are generally used to ... -
Fatigue Strength Curve for Tubular Joints of Offshore Structures under Dynamic Loading
(Journal article, 2021)Abstract Offshore structures are subjected to dynamic environmental loads (wave and wind loads). A stress-life fatigue strength curve is proposed for tubular joints which are in the splash zone area of offshore jacket ... -
Fatigue strength degradation of corroded structural details: A formula for S‐N curve
(Peer reviewed; Journal article, 2019)A formula is proposed to predict fatigue strength of corroded members and joints of steel structures. The concept of the formula is first studied from recently identified mechanism of corrosion fatigue. Hence, the corresponding ... -
Fatigue strength degradation of metals in corrosive environments
(Journal article; Peer reviewed, 2017)Structures exposed to aggressive environmental conditions are often subjected to time-dependent loss of coating and loss of material due to corrosion; this causes reduction in the cross-sectional properties of the members, ... -
Fatigue study of conductor at the conductor guides’ levels on the EKOFISK-K platform
(Masteroppgave/UIS-TN-IKM/2012;, Master thesis, 2012)This master thesis presents the method & results from a fatigue study of conductor at the conductor guides’ levels & static and dynamic hydrodynamic analysis of a 20’’ conductor installed on the Ekofisk-K platform using ...