Navigasjon

  • Hopp til innhold
NTNU Hjemmeside NTNU Hjemmeside

ntnu.no

  • Studier
    • Studere på NTNU
    • Finn studieprogram
    • Søke opptak
    • Videreutdanning og deltid
    • Forkurs og oppfriskning
  • Studentliv
    • Student i Gjøvik
    • Student i Trondheim
    • Student i Ålesund
  • Forskning og innovasjon
    • Forskning
    • Innovasjon
    • Satsingsområder
    • Toppforskning
    • Ekspertlister
    • Ph.d.
  • Om NTNU
    • Fakulteter og institutter
    • Sentre
    • Bibliotek
    • Kart
    • Ledige stillinger
    • Arrangement
    • Nyheter
    • Kontakt oss
    • Om NTNU
  1. Ansatte

Språkvelger

English

Sigmund Kyrre Ås

Last ned pressefoto
Last ned pressefoto
Foto:

Sigmund Kyrre Ås

Førsteamanuensis

sigmund.k.aas@ntnu.no
92298107 Marinteknisk senter, E 2.232, Tyholt, Otto Nielsens veg 10
Publikasjoner Undervisning Formidling

Publikasjoner

  • Kronologisk
  • Etter kategori
  • Se alle publikasjoner i Cristin

2023

  • Bhardwaj, Sachin; Ås, Sigmund Kyrre; RATNAYAKE MUDIYANSELAGE, Chandima. (2023) Experimental and numerical investigation of residual stresses in proximity girth welds. The International Journal of Advanced Manufacturing Technology
    Vitenskapelig artikkel
  • Hellum, Vidar; Gabrielsen, Øystein; Ås, Sigmund Kyrre. (2023) Fatigue crack growth in mooring chain steel at different mean load levels. Marine Structures
    Vitenskapelig artikkel

2022

  • Qvale, Paul; P. Zarandi, Ershad; Arredondo, Alberto; Ås, Sigmund Kyrre; Skallerud, Bjørn Helge. (2022) Effect of cyclic softening and mean stress relaxation on fatigue crack initiation in a hemispherical notch. Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
    Vitenskapelig artikkel
  • Qvale, Paul; Nordhagen, Håkon Ottar; Ås, Sigmund Kyrre; Skallerud, Bjørn Helge. (2022) Effect of long periods of corrosion on the fatigue lifetime of offshore mooring chain steel. Marine Structures
    Vitenskapelig artikkel

2021

  • Qvale, Paul; P. Zarandi, Ershad; Ås, Sigmund Kyrre; Skallerud, Bjørn Helge. (2021) Digital image correlation for continuous mapping of fatigue crack initiation sites on corroded surface from offshore mooring chain. International Journal of Fatigue
    Vitenskapelig artikkel

2020

  • Savio, Luca; Sileo, Lucia; Ås, Sigmund Kyrre. (2020) A comparison of physical and numerical modeling of homogenous isotropic propeller blades. Journal of Marine Science and Engineering (JMSE)
    Vitenskapelig artikkel

2018

  • Hallberg, Håkan; Ås, Sigmund Kyrre; Skallerud, Bjørn Helge. (2018) Crystal plasticity modeling of microstructure influence on fatigue crack initiation in extruded Al6082-T6 with surface irregularities. International Journal of Fatigue
    Vitenskapelig artikkel
  • Skallerud, Bjørn Helge; Ås, Sigmund Kyrre; Ottosen, Niels S.. (2018) A gradient-based multiaxial criterion for fatigue crack initiation prediction in components with surface roughness. International Journal of Fatigue
    Vitenskapelig artikkel
  • Garbatov, Y.; Ås, Sigmund Kyrre; Branner, K.; Choi, B.K.; Den Besten, J.H.; Dong, P.. (2018) Committee III.2: Fatigue and Fracture. IOS Press
    Faglig kapittel

2014

  • Ås, Sigmund Kyrre; Fjær, Hallvard Gustav; Olden, Vigdis; Lindholm, Dag; Akselsen, Odd Magne. (2014) Simulation of multipass welding of a steel pipe including modelling of hydrogen diffusion and fracture mechanics assessment.
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
  • Akselsen, Odd Magne; Ren, Xiaobo; Ås, Sigmund Kyrre. (2014) Review of Laser and Hybrid Laser-Arc Welding.
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

2013

  • Ren, Xiaobo; Akselsen, Odd Magne; Ås, Sigmund Kyrre; Kaplan, Alexander. (2013) Residual stresses of hybrid laser-arc welding for arctic application.
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

2012

  • S. Azar, Amin; Ås, Sigmund Kyrre; Akselsen, Odd Magne. (2012) Analytical Modeling of Weld Bead Shape in Dry Hyperbaric GMAW Using Ar-He Chamber Gas Mixtures. Journal of materials engineering and performance (Print)
    Vitenskapelig artikkel
  • Ren, Xiaobo; Ås, Sigmund Kyrre; Akselsen, Odd Magne; Nyhus, Bård. (2012) Residual Stresses of X80 Pipe Girth Weld. International Society of Offshore & Polar Engineers
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
  • Shahrestani Azar, Amin; Ås, Sigmund Kyrre; Akselsen, Odd Magne. (2012) Determination of Welding Heat Source Parameters Using the Actual Bead Shape. Computational Materials Science
    Vitenskapelig artikkel
  • Ren, Xiaobo; Akselsen, Odd Magne; Ås, Sigmund Kyrre; Nyhus, Bård. (2012) Numerical analysis of residual stresses in hyperbaric welding. The American Society of Mechanical Engineers (ASME)
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

2011

  • Ørjasæter, Oddvin; Ås, Sigmund Kyrre; Haagensen, Per Jahn; Tveiten, Bård Wathne. (2011) Fatigue of High Quality Girth Welds. The American Society of Mechanical Engineers (ASME)
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
  • Ren, Xiaobo; Ås, Sigmund Kyrre; Akselsen, Odd Magne; Nyhus, Bård. (2011) Comparison of Hybrid Laser-arc and Conventional Welding for Arctic Applications. International Society of Offshore & Polar Engineers
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
  • Ren, Xiaobo; Akselsen, Odd Magne; Ås, Sigmund Kyrre; Nyhus, Bård. (2011) NUMERICAL SIMULATION OF HYBRID LASER-ARC WELDING OF X70 PIPELINE STEEL.
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
  • Lange, Torstein; Eggen, Tor Gunnar; Ås, Sigmund Kyrre. (2011) Strategisk Egenfinansiert Prosjekt (SEP) - ""Modelling of stress corrosion cracking"". SINTEF Rapport
    Rapport

2009

  • Tveiten, Bård Wathne; Ås, Sigmund Kyrre; Fjeldstad, Arne. (2009) Fatigue Assessment of Aluminum Rectangular Hollow Section T-joints by Hot-Spot Stress Approach. ISOPE - International Offshore and Polar Engineering Conference. Proceedings
    Vitenskapelig artikkel
  • Ås, Sigmund Kyrre; Fjeldstad, Arne. (2009) Fatigue Assessment of Aluminum Rectangular Hollow Section T-joints by Hot-Spot Stress Approach. ISOPE - International Offshore and Polar Engineering Conference. Proceedings
    Vitenskapelig artikkel

2008

  • Ås, Sigmund Kyrre; Skallerud, Bjørn Helge; Tveiten, Bård Wathne. (2008) Surface roughness characterization for fatigue life predictions using finite element analysis. International Journal of Fatigue
    Vitenskapelig artikkel

2006

  • Ås, Sigmund Kyrre. (2006) Fatigue Life Prediction of an Aluminium Alloy Automotive Component Using Finite Element Analysis of Surface Topography. Doktoravhandlinger ved NTNU (2006:25)
    Vitenskapelig monografi

2005

  • Ås, Sigmund; Skallerud, Bjørn Helge; Tveiten, Bård; Holme, Børge. (2005) Fatigue life prediction of machined components using finite element analysis of surface topography. International Journal of Fatigue
    Vitenskapelig artikkel

Tidsskriftspublikasjoner

  • Bhardwaj, Sachin; Ås, Sigmund Kyrre; RATNAYAKE MUDIYANSELAGE, Chandima. (2023) Experimental and numerical investigation of residual stresses in proximity girth welds. The International Journal of Advanced Manufacturing Technology
    Vitenskapelig artikkel
  • Hellum, Vidar; Gabrielsen, Øystein; Ås, Sigmund Kyrre. (2023) Fatigue crack growth in mooring chain steel at different mean load levels. Marine Structures
    Vitenskapelig artikkel
  • Qvale, Paul; P. Zarandi, Ershad; Arredondo, Alberto; Ås, Sigmund Kyrre; Skallerud, Bjørn Helge. (2022) Effect of cyclic softening and mean stress relaxation on fatigue crack initiation in a hemispherical notch. Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
    Vitenskapelig artikkel
  • Qvale, Paul; Nordhagen, Håkon Ottar; Ås, Sigmund Kyrre; Skallerud, Bjørn Helge. (2022) Effect of long periods of corrosion on the fatigue lifetime of offshore mooring chain steel. Marine Structures
    Vitenskapelig artikkel
  • Qvale, Paul; P. Zarandi, Ershad; Ås, Sigmund Kyrre; Skallerud, Bjørn Helge. (2021) Digital image correlation for continuous mapping of fatigue crack initiation sites on corroded surface from offshore mooring chain. International Journal of Fatigue
    Vitenskapelig artikkel
  • Savio, Luca; Sileo, Lucia; Ås, Sigmund Kyrre. (2020) A comparison of physical and numerical modeling of homogenous isotropic propeller blades. Journal of Marine Science and Engineering (JMSE)
    Vitenskapelig artikkel
  • Hallberg, Håkan; Ås, Sigmund Kyrre; Skallerud, Bjørn Helge. (2018) Crystal plasticity modeling of microstructure influence on fatigue crack initiation in extruded Al6082-T6 with surface irregularities. International Journal of Fatigue
    Vitenskapelig artikkel
  • Skallerud, Bjørn Helge; Ås, Sigmund Kyrre; Ottosen, Niels S.. (2018) A gradient-based multiaxial criterion for fatigue crack initiation prediction in components with surface roughness. International Journal of Fatigue
    Vitenskapelig artikkel
  • S. Azar, Amin; Ås, Sigmund Kyrre; Akselsen, Odd Magne. (2012) Analytical Modeling of Weld Bead Shape in Dry Hyperbaric GMAW Using Ar-He Chamber Gas Mixtures. Journal of materials engineering and performance (Print)
    Vitenskapelig artikkel
  • Shahrestani Azar, Amin; Ås, Sigmund Kyrre; Akselsen, Odd Magne. (2012) Determination of Welding Heat Source Parameters Using the Actual Bead Shape. Computational Materials Science
    Vitenskapelig artikkel
  • Tveiten, Bård Wathne; Ås, Sigmund Kyrre; Fjeldstad, Arne. (2009) Fatigue Assessment of Aluminum Rectangular Hollow Section T-joints by Hot-Spot Stress Approach. ISOPE - International Offshore and Polar Engineering Conference. Proceedings
    Vitenskapelig artikkel
  • Ås, Sigmund Kyrre; Fjeldstad, Arne. (2009) Fatigue Assessment of Aluminum Rectangular Hollow Section T-joints by Hot-Spot Stress Approach. ISOPE - International Offshore and Polar Engineering Conference. Proceedings
    Vitenskapelig artikkel
  • Ås, Sigmund Kyrre; Skallerud, Bjørn Helge; Tveiten, Bård Wathne. (2008) Surface roughness characterization for fatigue life predictions using finite element analysis. International Journal of Fatigue
    Vitenskapelig artikkel
  • Ås, Sigmund; Skallerud, Bjørn Helge; Tveiten, Bård; Holme, Børge. (2005) Fatigue life prediction of machined components using finite element analysis of surface topography. International Journal of Fatigue
    Vitenskapelig artikkel

Bøker

  • Ås, Sigmund Kyrre. (2006) Fatigue Life Prediction of an Aluminium Alloy Automotive Component Using Finite Element Analysis of Surface Topography. Doktoravhandlinger ved NTNU (2006:25)
    Vitenskapelig monografi

Del av bok/rapport

  • Garbatov, Y.; Ås, Sigmund Kyrre; Branner, K.; Choi, B.K.; Den Besten, J.H.; Dong, P.. (2018) Committee III.2: Fatigue and Fracture. IOS Press
    Faglig kapittel
  • Ås, Sigmund Kyrre; Fjær, Hallvard Gustav; Olden, Vigdis; Lindholm, Dag; Akselsen, Odd Magne. (2014) Simulation of multipass welding of a steel pipe including modelling of hydrogen diffusion and fracture mechanics assessment.
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
  • Akselsen, Odd Magne; Ren, Xiaobo; Ås, Sigmund Kyrre. (2014) Review of Laser and Hybrid Laser-Arc Welding.
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
  • Ren, Xiaobo; Akselsen, Odd Magne; Ås, Sigmund Kyrre; Kaplan, Alexander. (2013) Residual stresses of hybrid laser-arc welding for arctic application.
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
  • Ren, Xiaobo; Ås, Sigmund Kyrre; Akselsen, Odd Magne; Nyhus, Bård. (2012) Residual Stresses of X80 Pipe Girth Weld. International Society of Offshore & Polar Engineers
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
  • Ren, Xiaobo; Akselsen, Odd Magne; Ås, Sigmund Kyrre; Nyhus, Bård. (2012) Numerical analysis of residual stresses in hyperbaric welding. The American Society of Mechanical Engineers (ASME)
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
  • Ørjasæter, Oddvin; Ås, Sigmund Kyrre; Haagensen, Per Jahn; Tveiten, Bård Wathne. (2011) Fatigue of High Quality Girth Welds. The American Society of Mechanical Engineers (ASME)
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
  • Ren, Xiaobo; Ås, Sigmund Kyrre; Akselsen, Odd Magne; Nyhus, Bård. (2011) Comparison of Hybrid Laser-arc and Conventional Welding for Arctic Applications. International Society of Offshore & Polar Engineers
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
  • Ren, Xiaobo; Akselsen, Odd Magne; Ås, Sigmund Kyrre; Nyhus, Bård. (2011) NUMERICAL SIMULATION OF HYBRID LASER-ARC WELDING OF X70 PIPELINE STEEL.
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

Rapport

  • Lange, Torstein; Eggen, Tor Gunnar; Ås, Sigmund Kyrre. (2011) Strategisk Egenfinansiert Prosjekt (SEP) - ""Modelling of stress corrosion cracking"". SINTEF Rapport
    Rapport

Undervisning

Emner

  • TMR4505 - Marine Structures, Specialization Course
  • TMR4500 - Marine Structures, Specialization Project
  • TMR4200 - Fatigue and Fracture of Marine Structures

Formidling

2021

  • Vitenskapelig foredrag
    Ås, Sigmund Kyrre; Andersen, Marius Endre; Pettersen, Håkon Kvalvåg; Heien, Henrik. (2021) Rapid estimation of stress concentrations due to corrosion using machine learning . ASRANet 3rd International Conference on Structural Integrity for Offshore Energy Industry , Online 2021-11-15 - 2021-11-16

2019

  • Vitenskapelig foredrag
    Savio, Luca; Sileo, Lucia; Ås, Sigmund Kyrre. (2019) A comparison of physical and numerical modeling of homogenous isotropic propeller blades. CNR-INM Sixth International Symposium on Marine Propulsors SMP’19 , Rome 2019-05-26 - 2019-05-30

2012

  • Faglig foredrag
    Kane, Pascal-Alexandre; Ås, Sigmund Kyrre; Østby, Erling. (2012) 3D Fracture Simulations of SENT Specimens Including Welding Residual Stresses. The Twenty-second International OFFSHORE AND POLAR ENGINEERING CONFERENCE 2012-06-17 - 2012-06-22

2006

  • Vitenskapelig foredrag
    Skallerud, Bjørn Helge; Ås, Sigmund Kyrre. (2006) Prediction of fatigue crack intitiation life of an aluminum alloy for automotive applications accounting for surface roughness. KTH Seminar , Dep Solid Mechanics 2006-03-13 - 2006-03-13

NTNU – Norges teknisk-naturvitenskapelige universitet

  • For ansatte
  • |
  • For studenter
  • |
  • Innsida
  • |
  • Blackboard

Studere

  • Om studier
  • Studieprogram
  • Emner
  • Videreutdanning
  • Karriere

Aktuelt

  • Nyheter
  • Arrangement
  • Jobbe ved NTNU

Om NTNU

  • Om NTNU
  • Bibliotek
  • Strategi
  • Forskning
  • Satsingsområder
  • Innovasjon
  • Organisasjonskart
  • Utdanningskvalitet

Kontakt

  • Kontakt oss
  • Finn ansatte
  • Spør en ekspert
  • Pressekontakter
  • Kart

NTNU i tre byer

  • NTNU i Gjøvik
  • NTNU i Trondheim
  • NTNU i Ålesund

Om nettstedet

  • Bruk av informasjonskapsler
  • Tilgjengelighetserklæring
  • Personvern
  • Ansvarlig redaktør
Facebook Instagram Linkedin Snapchat Tiktok Youtube
Logg inn
NTNU logo