Browsing Publikasjoner fra CRIStin - NTNU by Title
Now showing items 13267-13286 of 37394
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Fatigue and activity after stroke. Secondary results from the Life After stroke study
(Journal article; Peer reviewed, 2020)Objectives The aim of this study was to describe how the prevalence of fatigue changed from the subacute phase to the chronic phase after stroke, and to investigate how activity was associated with fatigue among participants ... -
Fatigue and cognition: Pupillary responses to problem-solving in early multiple sclerosis patients
(Journal article; Peer reviewed, 2017)Introduction In early multiple sclerosis (MS) patients, cognitive changes and fatigue are frequent and troublesome symptoms, probably related to both structural and functional brain changes. Whether there is a common ... -
Fatigue assessment of as‐built and heat‐treated Inconel 718 specimens produced by additive manufacturing including notch effects
(Journal article; Peer reviewed, 2020)The fatigue behaviour of notched and unnotched specimens produced by additively manufactured Inconel 718 were analysed in the as‐built and heat‐treated conditions. The surfaces display high roughness and defects acting as ... -
Fatigue Assessment of Inconel 625 Produced by Directed Energy Deposition from Miniaturized Specimens
(Peer reviewed; Journal article, 2022)In recent years, the industrial application of Inconel 625 has grown significantly. This material is a nickel-base alloy, which is well known for its chemical resistance and mechanical properties, especially in high-temperature ... -
Fatigue Assessment of Mooring Chain Considering the Effects Of Mean Load and Corrosion
(Peer reviewed; Journal article, 2021)Results from full scale fatigue tests of offshore mooring chains performed in recent years have revealed considerable influence of both mean load and corrosion condition on the fatigue capacity. It has been shown that a ... -
Fatigue assessment of semi-circular notched specimens produced by Laser Engineered Net Shaping method
(Journal article; Peer reviewed, 2018)As a primary failure mechanism, fatigue failure of additively manufactured metallic parts has attracted considerable attention in both aerospace and biomedical applications. According to some specific design requirements, ... -
Fatigue assessment of steel load-carrying cruciform welded joints by means of local approaches
(Journal article, 2018)In this paper, local approaches are employed to analyse stress distributions, local fatigue indicators of weld toe, and weld root in load‐carrying cruciform welded joints (LCWJs). An extension of previous available equations ... -
Fatigue assessment of steel rollers by means of the local energy
(Journal article; Peer reviewed, 2017)This paper aims to analyses the fatigue behavior of steel rollers using the average strain energy density (SED) criterion. Considering the variability of the V-notch opening angle, a simple scalar quantity, i.e. the value ... -
Fatigue Assessment of Ti–6Al–4V Circular Notched Specimens Produced by Selective Laser Melting
(Journal article; Peer reviewed, 2017)Additive manufacturing (AM) offers the potential to economically produce customized components with complex geometries in a shorter design-to-manufacture cycle. However, the basic understanding of the fatigue behavior of ... -
Fatigue assessment of welded joints by means of the strain energy density method: Numerical predictions and comparison with eurocode 3
(Journal article; Peer reviewed, 2019)The main aim of the present work is to investigate the effects of different parameters on the fatigue strength of four different welded details through an energetic approach based on the Strain Energy Density failure ... -
Fatigue Behavior of Metallic Components Obtained by Topology Optimization for Additive Manufacturing
(Peer reviewed; Journal article, 2021)The main goal of the present research is to propose an integrated methodology to address the fatigue performance of topology optimized components, produced by additive manufacturing. The main steps of the component design ... -
Fatigue behavior of porous Ti-6Al-4V made by laser-engineered net shaping
(Journal article; Peer reviewed, 2018)The fatigue behavior and fracture mechanisms of additively manufactured Ti-6Al-4V specimens are investigated in this study. Three sets of testing samples were fabricated for the assessment of fatigue life. The first batch ... -
Fatigue Capacity of Concrete Subjected to Partially Loaded Areas
(Chapter, 2022)The compressive strength of concrete at bearing areas is increased due to the confinement of surrounding concrete and reinforcement. In these partially loaded areas, local crushing and transverse tension forces must be ... -
Fatigue crack detection for lifetime extension of monopile-based offshore wind turbines
(Journal article; Peer reviewed, 2017)Lifetime extension becomes increasingly crucial for industry, since the first offshore wind farms face the end of their design lifetime. The remaining useful lifetime of offshore foundations is driven by fatigue design and ... -
Fatigue crack growth behavior of Ni-Cr-Mo-V steel welded joints considering strength mismatch effect
(Peer reviewed; Journal article, 2021)High strength steel welded joints are usually fabricated by heterogeneous weld metal for reducing the negative impacts of microstructural characteristics and defects on mechanical properties, such as hydrogen embrittlement ... -
Fatigue crack growth in mooring chain steel at different mean load levels
(Peer reviewed; Journal article, 2023)The fatigue crack growth rates of R4 mooring chain steel at different R-ratios are investigated. Crack growth experiments are performed at three different R-ratios, 0.1, 0.3 and 0.7, utilizing compact tension specimens in ... -
Fatigue Crack Growth Rate at Material and Geometry Transitions in Glass-Epoxy Composites
(Peer reviewed; Journal article, 2021)An element test specimen with ply drops, intended to be representative of a composite structure of varying thickness such as the main laminate in a wind turbine rotor blade structure, is used to investigate the fatigue ... -
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 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 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 ...