Blar i Institutt for konstruksjonsteknikk på forfatter "Qvale, Paul"
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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 ... -
Effect of cyclic softening and mean stress relaxation on fatigue crack initiation in a hemispherical notch
Qvale, Paul; zarandi, ershad; Arredondo, Alberto; Ås, Sigmund Kyrre; Skallerud, Bjørn Helge (Journal article; Peer reviewed, 2022) -
Effect of long periods of corrosion on the fatigue lifetime of offshore mooring chain steel
Qvale, Paul; Nordhagen, Håkon Ottar; Ås, Sigmund Kyrre; Skallerud, Bjørn Helge (Peer reviewed; Journal article, 2022)R4-grade mooring chain steel specimens were subjected to alternating phases of saltwater corrosion and air fatigue to replicate seasonal load variations on chains in service. No significant difference in fatigue lifetimes ... -
Fatigue crack initiation in corroded offshore mooring chains
Qvale, Paul (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, ...