Blar i Institutt for konstruksjonsteknikk på forfatter "Haagensen, Per Jahn"
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3D Scanning of Corroded Mooring Chain
Hoel, Alexander (Master thesis, 2016)This thesis is concerned with mooring line failure and 3D representations of corroded chain surfaces. Equipment for making such representations have been evaluated through a feasibility study carried out at NTNU. An ATOS ... -
Analysis of fatigue test data of retrieved mooring chain links subject to pitting corrosion
Mendoza Espinosa, Jorge; Haagensen, Per Jahn; Kohler, Jochen (Peer reviewed; Journal article, 2021)Fatigue is one of the main failure mechanisms of catenary type mooring lines. Fatigue resistance is affected by a large number of factors. In this paper, the effect of pitting corrosion on the fatigue resistance of mooring ... -
Chains in Mooring Systems
Bjørnsen, Evy (Master thesis, 2014)Mooring systems of floating structures consist of long lengths of chain, rope or wire, or a combination of these elements. As part of a station-keeping system, the mooring lines have to keep the movements of the structure ... -
Crack growth in high strength mooring line steel under variable amplitude loading
Aursand, Mads; Frøseth, Gunnstein Thomas; Haagensen, Per Jahn; Skallerud, Bjørn Helge (Peer reviewed; Journal article, 2024)Mooring lines are of key importance for the safe and reliable operation of numerous floating offshore structures. Due to the constantly changing wind and wave conditions acting on such structures, any fatigue crack growth ... -
Degradation Mechanisms of Chain Links in Offshore Mooring Lines
Tømmervåg, Kristin Hanem (Master thesis, 2016)Degradation mechanisms contributing to mooring line failures are identified and discussed with respect to the service conditions for the defined mooring line segments. Corrosion, environmental assisted cracking (EAC) and ... -
Growth of Fatigue Cracks in Mooring Line Chains
Hove, Martin (Master thesis, 2016)This master thesis is the continuation of a project work conducted during the fall of 2015, and is part of a series of studies investigating the effect of surface condition on the fatigue life of mooring chains. The study ... -
Multiaxial fatigue analysis of offshore mooring chains, considering the effects of residual stresses and corrosion pits
Zarandi, Ershad P. (Doctoral theses at NTNU;2020:337, Doctoral thesis, 2020)The integrity of the mooring lines used to anchor offshore facilities and floating platforms has been always desired while its continuous achievement has been challenging. Many mooring line failures have occurred in the ... -
Numerical Investigation of 3D Scanned Mooring Chains - Effects of Stress Concentrations from Corrosion Pits
Bache, Truls Johan Martin Braut (Master thesis, 2017)This thesis aims to numerically evaluate severe corrosion pits on offshore mooring chain. Pitting corrosion is considered a significant degradation mechanism as cracks tend to nucleate and propagate in areas of high stress ...