Gunnar Härkegård
About
Areas of activity
Mechanical Integrity and Fatigue Design
Recent and current research activities
-
FeVIND: Fatigue assessment (methods and data) of ductile cast iron components for wind turbines
- Weakest-link modelling, size effect
- Determination of size distribution of casting defects by means of X-ray computed tomography
- Monte-Carlo simulation of fatigue-crack growth from randomly distributed casting defects
-
MATSINT: Fatigue assessment of notches and cracks in ductile cast iron
- Self-arresting cracks at notches
- Fatigue assessment of notched components
- Growth of (short) fatigue cracks
-
Advanced Fatigue Modelling in Design
- Statistical description of defects
- Probabilistic modelling of fatigue limit
- Multiaxial fatigue assessment criteria
- Probabilistic fatigue assessment of Francis turbine runners
Current teaching activities
- TMM4195 Fatigue Design
Education and Experience
- Professor of Solid Mechanics at NTH (Trondheim)
- Visiting Professor at KTH (Stockholm), ETH (Zürich), University of Oxford and Visiting Fellow of Lincoln College (Oxford)
-
Research work on
- Non-metallic inclusions and fatigue
- Prestressed (wire-wound) high-pressure vessels
- Fatigue and creep at notches
- High-temperature fatigue
- Creep design
- Thermal stress
- Fretting fatigue
- Gas-turbine blades and disks
- Growth of short fatigue cracks
- Fatigue cracks at notches and defects incl. self-arresting cracks
- Weakest-link fatigue analysis
- Fatigue assessment of (heavy) components of ductile cast iron
- FEA post-processor for fatigue assessment
- Multiaxial fatigue
- Fatigue assessment of Francis turbine runners
- NTNU course in Machine Elements during ten years; Author of textbook (Tapir, 2004, edited reprint 2012) Dimensjonering av maskindeler
- Twenty years of experience from Swedish and Swiss industry with responsibility for advanced stress and lifetime analyses, materials development and materials selection for gas and steam turbines and high-pressure equipment.
- MSc (Engineering Physics) and DSc (Solid Mechanics) from KTH (Stockholm)
Membership in Academic and Professional Committees and Societies, Awards
- Member of the Swedish Fatigue Network, UTMIS (SE), member of the board 2007-2010
- Member of the European Structural Integrity Society, ESIS
- Fellow of the Institution of Mechanical Engineers, IMechE (UK), since 2008
- Member of the Editorial Board of the Journal of Strain Analysis (UK) 1998-2007
- CEGB Prize 2004
- Life Member of the American Society of Mechanical Engineers, ASME (US)
Search under 'Research results/NVI, Surname: Härkegård or H*rkeg*rd, First name: Gunnar
Competencies
Publications
2023
-
Härkegård, Gunnar.
(2023)
Intrinsic-crack modelling of the notch fatigue limit of a solid with an elliptical-cylindrical or a spheroidal cavity.
Engineering Fracture Mechanics
Academic article
2021
-
Härkegård, Gunnar.
(2021)
Critical-distance fatigue analysis of limiting cases of ellipsoidal cavities.
Engineering Fracture Mechanics
Academic article
2017
-
Härkegård, Gunnar.
(2017)
Comparison between different methods for the prediction of the fatigue limit of a member with a small crack.
Procedia Structural Integrity
Academic article
-
Qvale, Paul;
Härkegård, Gunnar.
(2017)
A simplified method for weakest-link fatigue assessment based on finite element analysis.
International Journal of Fatigue
Academic article
-
Klungerbo, Kristine;
Härkegård, Gunnar.
(2017)
Finite element analysis of peak stress and stress gradient at an elliptical through-hole.
Journal of Strain Analysis for Engineering Design
Academic article
2016
-
Härkegård, Gunnar.
(2016)
Modelling the effect of a spherical cavity on the fatigue limit of a 12% Cr steel.
Theoretical and Applied Fracture Mechanics
Academic article
-
Skallerud, Bjørn Helge;
Härkegård, Gunnar;
Lotsberg, Inge;
Wormsen, Anders.
(2016)
Preface to the special issue of International Journal of Fatigue on "fatigue at all scales".
International Journal of Fatigue
Editorial
-
Bruun, Øyvind Aleksander;
Härkegård, Gunnar.
(2016)
Erratum: A comparative study of design code criteria for prediction of the fatigue limit under in-phase and out-of-phase tension-torsion cycles (International Journal of Fatigue (2015) 73 (1-16) DOI: 10.1016/j.ijfatigue.2014.10.015).
International Journal of Fatigue
Errata
2015
-
Bruun, Øyvind Aleksander;
Härkegård, Gunnar.
(2015)
A comparative study of design code criteria for prediction of the fatigue limit under in-phase and out-of-phase tension-torsion cycles.
International Journal of Fatigue
Academic article
-
Härkegård, Gunnar.
(2015)
Short-crack modelling of the effect of corrosion pits on the fatigue limit of 12% Cr steel.
Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
Academic article
2014
-
Wormsen, Anders;
Härkegård, Gunnar.
(2014)
A novel probabilistic fatigue assessment tool and its application to an offshore riser joint.
Procedia Materials Science
Academic article
-
Crawford, B. R.;
Loader, C.;
Liu, Q.;
Harrison, T. J.;
Sharp, P. K.;
Härkegård, Gunnar.
(2014)
Experimental and modeling study of the effect of corrosion pitting on fatigue failure locations in aircraft components.
Advanced Materials Research
Academic article
2013
-
Cetin, Ali;
Næss, Arvid;
Härkegård, Gunnar.
(2013)
A physically based extreme value characterization of material fatigue.
International Journal of Fatigue
Academic article
-
Härkegård, Gunnar;
Svensson, Thomas;
Zambrano, Habib.
(2013)
Round-robin prediction of the fatigue limit of a ring of spheroidal graphite cast iron.
Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
Academic article
-
Zambrano, Habib;
Härkegård, Gunnar.
(2013)
Self-arresting cracks at notches in ductile cast iron.
Engineering Fracture Mechanics
Academic article
-
Cetin, Ali;
Härkegård, Gunnar;
Næss, Arvid.
(2013)
The fatigue limit: An analytical solution to a Monte Carlo problem.
International Journal of Fatigue
Academic article
2012
-
Karlén, Kristoffer;
Mårten, Olsson;
Ahmadi, Hamidreza;
Härkegård, Gunnar.
(2012)
On the effect of random defects on the fatigue notch factor at different stress ratios.
International Journal of Fatigue
Academic article
-
Shirani, Mehdi;
Härkegård, Gunnar.
(2012)
Damage tolerant design of cast components based on defects detected by 3D X-ray computed tomography.
International Journal of Fatigue
Academic article
-
Zambrano, Habib;
Härkegård, Gunnar;
Stärk, Klaus.
(2012)
Fracture toughness and growth of short and long fatigue cracks in ductile cast iron EN-GJS-400-18-LT.
Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
Academic article
-
Härkegård, Gunnar;
Marquis, Gary.
(2012)
Guest Editorial, Special Issue ‘Fatigue Design & Material Defects’.
International Journal of Fatigue
Editorial
-
Härkegård, Gunnar;
Marquis, Gary.
(2012)
Special Issue 'Fatigue Design & Material Defects'.
International Journal of Fatigue
Editorial
-
Härkegård, Gunnar.
(2012)
Dimensjonering av maskindeler.
Tapir Akademisk Forlag
Tapir Akademisk Forlag
Textbook
2011
-
Shirani, Mehdi;
Harkegård, Gunnar.
(2011)
Fatigue life distribution and size effect in ductile cast iron for wind turbine components.
Engineering Failure Analysis
Academic article
-
Härkegård, Gunnar.
(2011)
International Symposium on Fatigue Design & Material Defects: Book of Abstracts.
IPM, NTNU
Exhibition catalogue
-
Shirani, Mehdi;
Härkegård, Gunnar.
(2011)
Casting defects and fatigue behaviour of ductile cast iron for wind turbine components: A comprehensive study.
Materialwissenschaft und Werkstofftechnik
Academic article
-
Shirani, Mehdi;
Harkegård, Gunnar.
(2011)
Large scale axial fatigue testing of ductile cast iron for heavy section wind turbine components.
Engineering Failure Analysis
Academic article
2010
-
Cetin, Ali;
Harkegård, Gunnar.
(2010)
Fatigue life prediction for large threaded components.
Procedia Engineering
Academic article
-
Zambrano, Habib;
Harkegård, Gunnar.
(2010)
Self Arresting Fatigue Cracks at Notches in Nodular Cast Iron.
Procedia Engineering
Academic article
-
Shirani, Mehdi;
Harkegård, Gunnar;
Morin, N..
(2010)
Fatigue Life Prediction of Components Made of Spheroidal Graphite Cast Iron.
Procedia Engineering
Academic article
-
Harkegård, Gunnar;
Halleraker, G.
(2010)
Assessment of methods for prediction of notch and size effects at the fatigue limit based on test data by Bohm and Magin.
International Journal of Fatigue
Academic article
2009
-
Shirani, Mehdi;
Harkegård, Gunnar.
(2009)
Fatigue Crack Growth Simulation in Components with Random Defects.
Journal of ASTM International
Academic article
2008
-
Fjeldstad, Arne;
Wormsen, Anders;
Härkegård, Gunnar.
(2008)
Simulation of fatigue crack growth in components with random defects.
Engineering Fracture Mechanics
Academic article
-
Fjeldstad, Arne;
Wormsen, Anders;
Härkegård, Gunnar.
(2008)
Approximate stress intensity factors for cracked V-notched specimens based on asymptotic solutions with application to T-joints.
Engineering Fracture Mechanics
Academic article
-
Wormsen, Anders;
Fjeldstad, Arne;
Härkegård, Gunnar.
(2008)
A post-processor for fatigue crack growth analysis based on a finite element stress field.
Computer Methods in Applied Mechanics and Engineering
Academic article
2007
-
Wormsen, Anders;
Sjödin, Björn;
Härkegård, Gunnar;
Fjeldstad, Arne.
(2007)
Non-local stress approach for fatigue assessment based on weakest-link theory and statistics of extremes.
Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
Academic article
-
Wormsen, Anders;
Fjeldstad, Arne;
Härkegård, Gunnar.
(2007)
A post-processor for fatigue crack growth analysis based on a finite element stress field.
Computer Methods in Applied Mechanics and Engineering
Academic article
-
Mann, Torsten;
Härkegård, Gunnar;
Stärk, Klaus.
(2007)
Short fatigue crack growth in aluminium alloy 6082-T6.
International Journal of Fatigue
Academic article
-
Wormsen, Anders;
Sjodin, B;
Härkegård, Gunnar;
Fjeldstad, Arne.
(2007)
Non-local stress approach for fatigue assessment based on weakest-link theory and statistics of extremes.
Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
Academic article
2006
-
Nakajo, Arata;
Stiller, Christoph;
Harkegård, Gunnar;
Bolland, Olav.
(2006)
Modeling of thermal stresses and probability of survival of tubular SOFC.
Journal of Power Sources
Academic article
-
Tveiten, Bård Wathne;
Fjeldstad, Arne;
Härkegård, Gunnar;
Myhr, Ole Runar;
Bjørneklett, Børge.
(2006)
Fatigue life enhancement of aluminium joints through mechanical and thermal prestressing.
International Journal of Fatigue
Academic article
-
Wormsen, Anders;
Fjeldstad, Arne;
Härkegård, Gunnar.
(2006)
The application of asymptotic solutions to a semi-elliptical crack at the root of a notch.
Engineering Fracture Mechanics
Academic article
-
Mann, Torsten;
Tveiten, Bård Wathne;
Harkegård, Gunnar.
(2006)
Fatigue crack growth analysis of welded aluminium RHS T-joints with manipulated residual stress level.
Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
Academic article
-
Mann, Torsten;
Härkegård, Gunnar;
Tveiten, Bård.
(2006)
Fatigue assessment methods for welded structures and their application to an aluminium T-joint.
Tapir Akademisk Forlag
Doktoravhandlinger ved NTNU (2006:129)
Doctoral dissertation
2005
-
Härkegård, Gunnar;
Wormsen, Anders.
(2005)
Non-linear analysis of shallow cracks in smooth and notched plates. Part 1: analytical evaluation.
Journal of Strain Analysis for Engineering Design
Academic article
-
Wormsen, Anders;
Härkegård, Gunnar.
(2005)
Non-linear analysis of shallow cracks in smooth and notched plates. Part 2: finite element validation.
Journal of Strain Analysis for Engineering Design
Academic article
-
Huth, Hans-Jörg;
Härkegård, Gunnar.
(2005)
Fatigue Design of Hydraulic Turbine Runners.
Doktoravhandlinger ved NTNU (2005:19)
Doctoral dissertation
-
Harkegård, Gunnar;
Denk, Josef;
Stärk, Klaus.
(2005)
Growth of naturally initiated fatigue cracks in ferritic gas turbine rotor steels.
International Journal of Fatigue
Academic article
2004
-
Huth, Hans-Jörg;
Härkegård, Gunnar.
(2004)
Experimental fatigue testing of standard and shape optimised Francis runner notches.
NTNU
Report
-
Härkegård, Gunnar.
(2004)
Evaluation of the Gas Turbine Centre.
The Swedish Energy Agency
Report
-
Harkegård, Gunnar.
(2004)
Design and analysis of machine elements.
Tapir Akademisk Forlag
Tapir Akademisk Forlag
Textbook
Journal publications
-
Härkegård, Gunnar.
(2023)
Intrinsic-crack modelling of the notch fatigue limit of a solid with an elliptical-cylindrical or a spheroidal cavity.
Engineering Fracture Mechanics
Academic article
-
Härkegård, Gunnar.
(2021)
Critical-distance fatigue analysis of limiting cases of ellipsoidal cavities.
Engineering Fracture Mechanics
Academic article
-
Härkegård, Gunnar.
(2017)
Comparison between different methods for the prediction of the fatigue limit of a member with a small crack.
Procedia Structural Integrity
Academic article
-
Qvale, Paul;
Härkegård, Gunnar.
(2017)
A simplified method for weakest-link fatigue assessment based on finite element analysis.
International Journal of Fatigue
Academic article
-
Klungerbo, Kristine;
Härkegård, Gunnar.
(2017)
Finite element analysis of peak stress and stress gradient at an elliptical through-hole.
Journal of Strain Analysis for Engineering Design
Academic article
-
Härkegård, Gunnar.
(2016)
Modelling the effect of a spherical cavity on the fatigue limit of a 12% Cr steel.
Theoretical and Applied Fracture Mechanics
Academic article
-
Skallerud, Bjørn Helge;
Härkegård, Gunnar;
Lotsberg, Inge;
Wormsen, Anders.
(2016)
Preface to the special issue of International Journal of Fatigue on "fatigue at all scales".
International Journal of Fatigue
Editorial
-
Bruun, Øyvind Aleksander;
Härkegård, Gunnar.
(2016)
Erratum: A comparative study of design code criteria for prediction of the fatigue limit under in-phase and out-of-phase tension-torsion cycles (International Journal of Fatigue (2015) 73 (1-16) DOI: 10.1016/j.ijfatigue.2014.10.015).
International Journal of Fatigue
Errata
-
Bruun, Øyvind Aleksander;
Härkegård, Gunnar.
(2015)
A comparative study of design code criteria for prediction of the fatigue limit under in-phase and out-of-phase tension-torsion cycles.
International Journal of Fatigue
Academic article
-
Härkegård, Gunnar.
(2015)
Short-crack modelling of the effect of corrosion pits on the fatigue limit of 12% Cr steel.
Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
Academic article
-
Wormsen, Anders;
Härkegård, Gunnar.
(2014)
A novel probabilistic fatigue assessment tool and its application to an offshore riser joint.
Procedia Materials Science
Academic article
-
Crawford, B. R.;
Loader, C.;
Liu, Q.;
Harrison, T. J.;
Sharp, P. K.;
Härkegård, Gunnar.
(2014)
Experimental and modeling study of the effect of corrosion pitting on fatigue failure locations in aircraft components.
Advanced Materials Research
Academic article
-
Cetin, Ali;
Næss, Arvid;
Härkegård, Gunnar.
(2013)
A physically based extreme value characterization of material fatigue.
International Journal of Fatigue
Academic article
-
Härkegård, Gunnar;
Svensson, Thomas;
Zambrano, Habib.
(2013)
Round-robin prediction of the fatigue limit of a ring of spheroidal graphite cast iron.
Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
Academic article
-
Zambrano, Habib;
Härkegård, Gunnar.
(2013)
Self-arresting cracks at notches in ductile cast iron.
Engineering Fracture Mechanics
Academic article
-
Cetin, Ali;
Härkegård, Gunnar;
Næss, Arvid.
(2013)
The fatigue limit: An analytical solution to a Monte Carlo problem.
International Journal of Fatigue
Academic article
-
Karlén, Kristoffer;
Mårten, Olsson;
Ahmadi, Hamidreza;
Härkegård, Gunnar.
(2012)
On the effect of random defects on the fatigue notch factor at different stress ratios.
International Journal of Fatigue
Academic article
-
Shirani, Mehdi;
Härkegård, Gunnar.
(2012)
Damage tolerant design of cast components based on defects detected by 3D X-ray computed tomography.
International Journal of Fatigue
Academic article
-
Zambrano, Habib;
Härkegård, Gunnar;
Stärk, Klaus.
(2012)
Fracture toughness and growth of short and long fatigue cracks in ductile cast iron EN-GJS-400-18-LT.
Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
Academic article
-
Härkegård, Gunnar;
Marquis, Gary.
(2012)
Guest Editorial, Special Issue ‘Fatigue Design & Material Defects’.
International Journal of Fatigue
Editorial
-
Härkegård, Gunnar;
Marquis, Gary.
(2012)
Special Issue 'Fatigue Design & Material Defects'.
International Journal of Fatigue
Editorial
-
Shirani, Mehdi;
Harkegård, Gunnar.
(2011)
Fatigue life distribution and size effect in ductile cast iron for wind turbine components.
Engineering Failure Analysis
Academic article
-
Shirani, Mehdi;
Härkegård, Gunnar.
(2011)
Casting defects and fatigue behaviour of ductile cast iron for wind turbine components: A comprehensive study.
Materialwissenschaft und Werkstofftechnik
Academic article
-
Shirani, Mehdi;
Harkegård, Gunnar.
(2011)
Large scale axial fatigue testing of ductile cast iron for heavy section wind turbine components.
Engineering Failure Analysis
Academic article
-
Cetin, Ali;
Harkegård, Gunnar.
(2010)
Fatigue life prediction for large threaded components.
Procedia Engineering
Academic article
-
Zambrano, Habib;
Harkegård, Gunnar.
(2010)
Self Arresting Fatigue Cracks at Notches in Nodular Cast Iron.
Procedia Engineering
Academic article
-
Shirani, Mehdi;
Harkegård, Gunnar;
Morin, N..
(2010)
Fatigue Life Prediction of Components Made of Spheroidal Graphite Cast Iron.
Procedia Engineering
Academic article
-
Harkegård, Gunnar;
Halleraker, G.
(2010)
Assessment of methods for prediction of notch and size effects at the fatigue limit based on test data by Bohm and Magin.
International Journal of Fatigue
Academic article
-
Shirani, Mehdi;
Harkegård, Gunnar.
(2009)
Fatigue Crack Growth Simulation in Components with Random Defects.
Journal of ASTM International
Academic article
-
Fjeldstad, Arne;
Wormsen, Anders;
Härkegård, Gunnar.
(2008)
Simulation of fatigue crack growth in components with random defects.
Engineering Fracture Mechanics
Academic article
-
Fjeldstad, Arne;
Wormsen, Anders;
Härkegård, Gunnar.
(2008)
Approximate stress intensity factors for cracked V-notched specimens based on asymptotic solutions with application to T-joints.
Engineering Fracture Mechanics
Academic article
-
Wormsen, Anders;
Fjeldstad, Arne;
Härkegård, Gunnar.
(2008)
A post-processor for fatigue crack growth analysis based on a finite element stress field.
Computer Methods in Applied Mechanics and Engineering
Academic article
-
Wormsen, Anders;
Sjödin, Björn;
Härkegård, Gunnar;
Fjeldstad, Arne.
(2007)
Non-local stress approach for fatigue assessment based on weakest-link theory and statistics of extremes.
Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
Academic article
-
Wormsen, Anders;
Fjeldstad, Arne;
Härkegård, Gunnar.
(2007)
A post-processor for fatigue crack growth analysis based on a finite element stress field.
Computer Methods in Applied Mechanics and Engineering
Academic article
-
Mann, Torsten;
Härkegård, Gunnar;
Stärk, Klaus.
(2007)
Short fatigue crack growth in aluminium alloy 6082-T6.
International Journal of Fatigue
Academic article
-
Wormsen, Anders;
Sjodin, B;
Härkegård, Gunnar;
Fjeldstad, Arne.
(2007)
Non-local stress approach for fatigue assessment based on weakest-link theory and statistics of extremes.
Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
Academic article
-
Nakajo, Arata;
Stiller, Christoph;
Harkegård, Gunnar;
Bolland, Olav.
(2006)
Modeling of thermal stresses and probability of survival of tubular SOFC.
Journal of Power Sources
Academic article
-
Tveiten, Bård Wathne;
Fjeldstad, Arne;
Härkegård, Gunnar;
Myhr, Ole Runar;
Bjørneklett, Børge.
(2006)
Fatigue life enhancement of aluminium joints through mechanical and thermal prestressing.
International Journal of Fatigue
Academic article
-
Wormsen, Anders;
Fjeldstad, Arne;
Härkegård, Gunnar.
(2006)
The application of asymptotic solutions to a semi-elliptical crack at the root of a notch.
Engineering Fracture Mechanics
Academic article
-
Mann, Torsten;
Tveiten, Bård Wathne;
Harkegård, Gunnar.
(2006)
Fatigue crack growth analysis of welded aluminium RHS T-joints with manipulated residual stress level.
Fatigue & Fracture of Engineering Materials & Structures (FFEMS)
Academic article
-
Härkegård, Gunnar;
Wormsen, Anders.
(2005)
Non-linear analysis of shallow cracks in smooth and notched plates. Part 1: analytical evaluation.
Journal of Strain Analysis for Engineering Design
Academic article
-
Wormsen, Anders;
Härkegård, Gunnar.
(2005)
Non-linear analysis of shallow cracks in smooth and notched plates. Part 2: finite element validation.
Journal of Strain Analysis for Engineering Design
Academic article
-
Harkegård, Gunnar;
Denk, Josef;
Stärk, Klaus.
(2005)
Growth of naturally initiated fatigue cracks in ferritic gas turbine rotor steels.
International Journal of Fatigue
Academic article
Books
-
Härkegård, Gunnar.
(2012)
Dimensjonering av maskindeler.
Tapir Akademisk Forlag
Tapir Akademisk Forlag
Textbook
-
Härkegård, Gunnar.
(2011)
International Symposium on Fatigue Design & Material Defects: Book of Abstracts.
IPM, NTNU
Exhibition catalogue
-
Harkegård, Gunnar.
(2004)
Design and analysis of machine elements.
Tapir Akademisk Forlag
Tapir Akademisk Forlag
Textbook
Report
-
Mann, Torsten;
Härkegård, Gunnar;
Tveiten, Bård.
(2006)
Fatigue assessment methods for welded structures and their application to an aluminium T-joint.
Tapir Akademisk Forlag
Doktoravhandlinger ved NTNU (2006:129)
Doctoral dissertation
-
Huth, Hans-Jörg;
Härkegård, Gunnar.
(2005)
Fatigue Design of Hydraulic Turbine Runners.
Doktoravhandlinger ved NTNU (2005:19)
Doctoral dissertation
-
Huth, Hans-Jörg;
Härkegård, Gunnar.
(2004)
Experimental fatigue testing of standard and shape optimised Francis runner notches.
NTNU
Report
-
Härkegård, Gunnar.
(2004)
Evaluation of the Gas Turbine Centre.
The Swedish Energy Agency
Report
Outreach
2017
-
Academic lectureHärkegård, Gunnar. (2017) Short-crack modelling of the fatigue limit of plain and notched members with application to corrosion pits in a 12% Cr steel. IPM ASCR Personal invitation by the Institute of Physics of Materials of the Academy of Sciences of the Czech Republic , Brno 2017-11-14 -
-
Academic lectureHärkegård, Gunnar. (2017) Comparison between different methods for the prediction of the fatigue limit of a member with a small crack. Politecnico di Milano 3rd International Symposium on Fatigue Design and Material Defects , Lecco 2017-09-19 - 2017-09-22
2014
-
LectureHärkegård, Gunnar. (2014) Short-crack modelling of the effect of corrosion pits on the fatigue limit of a 12% Cr steel. Société Française de Métallurgie et Matériaux 2nd International Symposium on Fatigue Design & Material Defects , Paris 2014-06-11 - 2014-06-13
-
LectureWormsen, Anders; Härkegård, Gunnar. (2014) A novel probabilistic fatigue assessment tool and its application to an offshore riser joint. NTNU 20th European Conference of Fracture , Trondheim 2014-06-30 - 2014-07-04
-
LectureHärkegård, Gunnar. (2014) Fatigue analysis of notches, defects and cracks. The Swedish Fatigue Network (UTMIS) The autumn meeting of the Swedish Fatigue Network , KTH, Stockholm 2014-10-20 - 2014-10-21
2013
-
Academic lectureHärkegård, Gunnar. (2013) Fatigue crack growth threshold modelling of stress raisers with application to corrosion pits. Institutionen för hållfasthetslära Seminarieserie ved Hållfasthetslära, KTH , KTH, Stockholm 2013-01-31 -
-
Academic lectureCetin, Ali; Härkegård, Gunnar; Næss, Arvid. (2013) The fatigue limit: An analytical solution to a Monte Carlo problem. ICEAF III: 3rd International Conference of Engineering Against Failure 2013-06-26 - 2013-06-28
2012
-
Academic lectureHärkegård, Gunnar. (2012) Fatigue assessment of stress raisers with application to corrosion fatigue. Electric Power Research Institute (EPRI) EPRI Expert Workshop “Corrosion-Fatigue Damage and Life Prediction for Steam Turbine Blades” , Boston 2012-07-18 - 2012-07-19
2011
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Academic lectureHärkegård, Gunnar. (2011) Novel Methodology for Fatigue Design of Wind Turbine Components of Ductile Cast Iron. NOWITECH Wind Power R&D seminar - Deep sea offshore wind power , Trondheim 2011-01-20 - 2011-01-21
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Academic lectureKarlén, Kristoffer; Olsson, Mårten; Härkegård, Gunnar. (2011) Comparison between experimentally determined fatigue notch factors and defect-based estimates. Swedish Fatigue Network (UTMIS) and NTNU/IPM International Symposium on Fatigue Design & Material Defects , Trondheim 2011-05-23 - 2011-05-25
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Academic lectureShirani, Mehdi; Härkegård, Gunnar; Mathes, Michael. (2011) Damage tolerant design of cast components based on defects detected by 3D X-ray computed tomography. Swedish Fatigue Network (UTMIS) and NTNU/IPM International Symposium on Fatigue Design & Material Defects , Trondheim 2011-05-23 - 2011-05-25
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PosterZambrano, Habib; Härkegård, Gunnar; Stärk, Klaus. (2011) Short fatigue crack growth in ductile cast iron. Swedish Fatigue Network (UTMIS) and NTNU/IPM International Symposium on Fatigue Design & Material Defects , Trondheim 2011-05-23 - 2011-05-25
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PosterHärkegård, Gunnar; Cetin, Ali; Shirani, Mehdi; Zambrano, Habib. (2011) A defect-based fatigue design methodology. Swedish Fatigue Design Network (UTMIS) and NTNU/IPM International Symposium on Fatigue Design & Material Defects , Trondheim 2011-05-23 - 2011-05-25
2010
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Academic lectureHarkegård, Gunnar. (2010) Software for fatigue life assessment – Features and challenges. Swedish Fatigue Network UTMIS Spring Meeting ‘Post-processing of FEA stresses for fatigue assessment’ , Örebro 2010-05-25 - 2010-05-26
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Academic lectureHarkegård, Gunnar. (2010) A defect-based fatigue design methodology. KTH, Solid Mechanics Fred Nilsson Seminar , KTH, Stockholm 2010-11-25 -
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Academic lectureHarkegård, Gunnar. (2010) A shift from empirical to mechanism-based fatigue design criteria. Int Fatigue Congress Committee 10th International Fatigue Congress , Prague 2010-06-06 - 2010-06-11
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Academic lectureShirani, Mehdi; Harkegård, Gunnar. (2010) Fatigue Life Prediction of Components Made of Spheroidal Graphite Iron. 10th International Fatigue Congress , P 2010-06-06 - 2010-06-11
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Academic lectureZambrano, Habib; Harkegård, Gunnar. (2010) Self-Arresting Fatigue Cracks at Notches in Nodular Cast Iron. 10th International Fatigue Congress , Praha 2010-06-06 - 2010-06-11
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Academic lectureCetin, Ali; Harkegård, Gunnar. (2010) Fatigue Life Prediction for Large Threaded Components. 10th International Fatigue Congress , Praha 2010-06-06 - 2010-06-11
2008
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Academic lectureHärkegård, Gunnar. (2008) A post-processor for fatigue-crack growth analysis based on a finite-element stress field and its application to components with random defects. Institutionen för hållfasthetslära Seminarier i hållfasthetslära, KTH , KTH, Stockholm 2008-04-08 -
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Academic lectureHärkegård, Gunnar. (2008) Physically based fatigue life prediction vs. empirical fatigue design – Towards a paradigm shift?. Scania Internt symposium, Scania , Södertälje 2008-05-29 -
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Academic lectureHärkegård, Gunnar. (2008) Fatigue at notches: HCF, LCF, da/dn. Volvo Aero Internt symposium, Volvo Aero , Trollhättan 2008-04-16 -
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Academic lectureHärkegård, Gunnar. (2008) Fatigue assessment based on weakest-link theory. Institutionen för hållfasthetslära Seminarier i hållfasthetslära, KTH , KTH, Stockholm 2008-03-11 -
2007
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Academic lectureHärkegård, Gunnar. (2007) Spännings- och utmattningsanalys i skön förening. Utmattningsnätverket i Sverige, UTMIS og Volvo UTMIS nätverksmöte , Braås 2007-01-30 - 2007-01-31
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Academic lectureHärkegård, Gunnar. (2007) Utmattingsberegninger av støpte vindturbinkomponenter med hensyn til materialdefekter. Rolls-Royce Marine og Siemens Wind Power Prosjektmøte , Brande 2007-03-29 - 2007-03-29
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Academic lectureHärkegård, Gunnar. (2007) Probabilistiske utmattingsberegninger. Statoil Invitert foredrag , Trondheim 2007-02-16 - 2007-02-16
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Academic lectureHärkegård, Gunnar. (2007) Probabilistiske utmattingsberegninger av komponenter med materialdefekter. Støpvind og SINTEF Prosjektmøte , Trondheim 2007-03-21 - 2007-03-22
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Academic lectureHärkegård, Gunnar. (2007) Utmattingsanalyse av vindmøllekomponenter. SINTEF Prosjektmøte , Trondheim 2007-02-07 - 2007-02-07
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Academic lectureHärkegård, Gunnar. (2007) Utmatting og materialdefekter i komponenter av støpejern. SINTEF FeVIND-møte , Trondheim 2007-06-04 -
2006
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Academic lectureHärkegård, Gunnar. (2006) Fatigue-life prediction through post-processing of FEA stress fields. Alstom Power Invitert foredrag , Baden 2006-08-18 - 2006-08-18
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Academic lectureWormsen, Anders; Härkegård, Gunnar; Fjeldstad, Arne. (2006) P•FAT - the finite-element post-processor. GE Energy Prosjektmøte , Kjeller 2006-06-15 - 2006-06-15
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Academic lectureHärkegård, Gunnar. (2006) Prosessbasert utmattingsdimensjonering av stykkstøpte lettmetallkomponenter. SINTEF Prosjektmøte , Trondheim 2006-03-28 - 2006-03-28
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Academic lectureFjeldstad, Arne; Härkegård, Gunnar; Wormsen, Anders. (2006) The influence of a stress gradient on the growth of a fatigue crack. Elsevier 9th international fatigue congress , Atlanta 2006-05-14 - 2006-05-19
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Academic lectureMann, Torsten; Härkegård, Gunnar; Stärk, Klaus. (2006) Short fatigue crack growth in aluminium alloy 6082-T6. Elsevier International Conference on Fatigue Damage of Structural Materials VI , Hyannis 2006-09-17 - 2006-09-22
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Academic lectureHärkegård, Gunnar. (2006) Durable light-alloy car components. BMW Forschungs- und Innovationszentrum Invitert foredrag , München 2006-05-09 - 2006-05-09
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Academic lectureHärkegård, Gunnar. (2006) Nye perspektiver i levetidsberegninger av sveiste og usveiste konstruksjoner – Probabilistiske metoder. Stålmat og Statoil Materialdagen 2006 , Stavanger 2006-10-25 - 2006-10-25
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Academic lectureWormsen, Anders; Härkegård, Gunnar. (2006) Weibull fatigue analysis of notched components under constant and variable amplitude loading. Elsevier 9th International Fatigue Congress , Atlanta 2006-05-14 - 2006-05-19
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Academic lectureWormsen, Anders; Härkegård, Gunnar; Huth, Hans-Jörg. (2006) Probabilistic fatigue assessment of a hydro-turbine blade model. Elsevier 9th International Fatigue Congress , Atlanta 2006-05-14 - 2006-05-19
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Academic lectureWelte, Thomas Michael; Wormsen, Anders; Härkegård, Gunnar. (2006) Influence of Different Operating Patterns on the Life of Francis Turbine Runners. HCI Publications, Inc. HydroVision 2006 , Portland 2006-07-31 - 2006-08-04
2005
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Academic lectureWormsen, Anders; Härkegård, Gunnar. (2005) A non-local procedure for the assessment of multiaxial high cycle fatigue failure: computer implementation. GE Energy (Norway) AS Foredrag , Trondheim 2005-01-20 - 2005-01-20
2004
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Academic lectureMann, Torsten; Tveiten, Bård Wathne; Harkegård, Gunnar. (2004) Fatigue of Welded Aluminium T-joints. European Structural Integrity Society The 15th European Conference of Fracture , Stockholm 2004-08-11 - 2004-08-13
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Academic lectureWormsen, Anders; Harkegård, Gunnar. (2004) A Local Approach for Cracks in Smooth and Notched Components. European Structural Integrity Society The 15th European Conference of Fracture - Advanced Fracture Mechanics for Life and Safety Assessment , Stockholm 2004-08-11 - 2004-08-13
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Academic lectureWormsen, Anders; Harkegård, Gunnar. (2004) A Statistical Investigation of Fatigue Behaviour According To Weibull's Weakest-Link Theory. European Structural Integrity Society The 15th European Conference of Fracture - Advanced Fracture Mechanics for Life and Safety Assessments , Stockholm 2004-08-11 - 2004-08-13
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Academic lectureWormsen, Anders; Harkegård, Gunnar. (2004) Incorporating Finite Element Analysis into Component Fatigue Strength, Life and Reliability - Part 1. GE Power Systems Probabilistic fatigue design of hydraulic turbine runners , Kjeller 2004-08-26 - 2004-08-26
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Academic lectureWormsen, Anders; Harkegård, Gunnar. (2004) Incorporating Finite Element Analysis into Component Fatigue Strength, Life and Reliability - Part 2. GE Power Systems Turbinseminar , Trondheim 2004-11-18 - 2004-11-19
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Academic lectureWormsen, Anders; Harkegård, Gunnar. (2004) Probabilistic Fatigue Assessment. GE Power Systems Probabilistic fatigue design of hydraulic turbine runners , Kjeller 2004-03-10 - 2004-03-10
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Academic lectureHärkegård, Gunnar. (2004) Modellering av kast i aksler. Volvo Aero (Norway) Arbeidsgruppe "Maskinering av aksler" , Kongsberg 2004-02-11 - 2004-02-11
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Academic lectureHärkegård, Gunnar. (2004) Utmattingsdimensionering - några personliga reflexioner. Utmattningsnätverket i Sverige (UTMIS) UTMIS vårmöte , SIEMENS Industrial Turbines, Finspång 2004-05-24 - 2004-05-25
2000
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Academic lectureHärkegård, Gunnar; Huth, Hans-Jörg; Faanes, Steinar. (2000) FEA-based fatigue assessment methodology for hydraulic turbine runners. Churchill College Parsons 2000 - Advanced Materials for 21st Century Tubines and Power Plants , Cambridge 2000-07-03 - 2000-07-07