Sökning: "Fatigue performance"

Visar resultat 16 - 20 av 247 avhandlingar innehållade orden Fatigue performance.

1. 16. Residual Stress Analysis and Fatigue of Welded Structures

   Författare :Zuheir Barsoum; Jack Samuelsson; Jan Langkjear Hansen; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; welding; fatigue; finite element analysis; fracture mechanics; residual stresses; Engineering mechanics; Teknisk mekanik;

   Sammanfattning : This licentiate thesis is generally concerned with the fatigue of welded structures. Several topics related to fatigue of welded structures are treated such as; weld defects and their influence on fatigue performance of welded structures, fatigue life prediction using LEFM (Linear Elastic Fracture Mechanics), fatigue testing, welding simulation, residual stress prediction and measurement and their influence on fatigue. LÄS MER

3. 17. Reliability-based fatigue assessment of existing steel bridges

   Författare :Ruoqi Wang; John Leander; Raid Karoumi; John Dalsgaard Sørensen; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fatigue; steel bridges; reliability analysis; spatial correlation; risk analysis; Monte Carlo simulation; Utmattning; stålbroar; tillförlitlighet; rumslig korrelation; riskanalys; Monte Carlo-simulering; Structural Engineering and Bridges; Bro- och stålbyggnad;

   Sammanfattning : Fatigue is among the most critical forms of deterioration damage that occurs tosteel bridges. It causes a decline of the safety level of bridges over time. Therefore,the performance of steel bridges, which may be seriously affected by fatigue, shouldbe assessed and predicted. LÄS MER

4. 18. Fatigue Strength of Friction Stir Welded Joints in Aluminium

   Författare :Mats Ericsson; Rolf Sandström; Ole Terje Midling; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Applied Materials Technology; friction stir welding; fatigue; mechanical properties; welding speed; softening; Materialvetenskap; Materials science; Teknisk materialvetenskap;

   Sammanfattning : Solid state Friction stir welding (FSW) is of major interest in the welding of aluminium since it improves the joint properties. Many applications where Al-alloys are used are subject to varying load conditions, making fatigue failure a critical issue. LÄS MER

5. 19. Analysis of Fatigue Characteristics in Mooring Lines and Low Voltage Cables for Wave Energy Converters

   Författare :Shun-Han Yang; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wave energy converter; de-coupled analysis; power cable; fatigue; dynamic cable; heaving point absorber; mooring line; coupled analysis; power absorption; marine biofouling effect on absorbed power; low voltage cable; catenary mooring chain; marine biofouling effect on fatigue;

   Sammanfattning : To reduce both carbon emission and fossil fuel consumption, there is a pressing need for the exploitation of renewable sources of energy such as biomass, hydropower, solar power, waves, and wind. This thesis addresses the application of wave energy, which has a large potential to contribute to the world’s renewable emission-free energy supply. LÄS MER

7. 20. Corrosion Fatigue of Stainless Steels

   Författare :Jan Linder; KTH; []
   Nyckelord :Stainless steel; corrosion fatigue; crack propagation; spot weld;

   Sammanfattning : The aim of this work was to investigate the effect ofchloride-containing environments on corrosion fatigueproperties for different stainless steels grades. The steelsinvestigated ranged from the standard 304 grade to thesuperaustenitic 654SMO and the superduplex SAF2507. LÄS MER