Sökning: "fatigue strength"

Visar resultat 11 - 15 av 208 avhandlingar innehållade orden fatigue strength.

  1. 11. Evaluation of concrete structures : strength development and fatigue capacity

    Författare :Håkan Thun; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : This licentiate thesis consists of four papers. In paper A the development of tensile and compression strength are presented for old concrete railway trough bridges. The compression strength has usually increased 50 to 100% over the years. However the same could not be said for the tensile strength. LÄS MER

  3. 12. Direct Calculation of Wave-Induced Loads and Fatigue Damage of Container Vessels

    Författare :Zhiyuan Li; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; fatigue; stress concentration factor; direct calculation; Container ship; fatigue routing; wave-induced torsion.; extreme loading; nonlinear wave loads;

    Sammanfattning : Container ships and their rules for fatigue design are in several ways differentcompared with other types of commercial ships such as tankers and bulk carriers. Forexample, most modern container ships have a pronounced bow flare and an overhangstern. LÄS MER

  4. 13. High Temperature Fatigue Behaviour of Austenitic Stainless Steel : Microstructural Evolution during Dwell-Fatigue and Thermomechanical Fatigue

    Författare :Hugo Wärner; Mattias Calmunger; Johan Moverare; Guocai Chai; Sten Johansson; Martina Zimmermann; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The global energy consumption is increasing and together with global warming from greenhouse gas emission, a need for more environmentally friendly energy production processes is created. Higher efficiency of biomass power plants can be achieved by increasing temperature and pressure in the boiler section, this would increase the generation of electricity along with the reduction in emission of greenhouse gases e. LÄS MER

  5. 14. 3D-printing for Aerospace : Fatigue Behaviour of Additively Manufactured Titanium

    Författare :Magnus Kahlin; Johan Moverare; Hans Ansell; Gianni Nicoletto; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; additive manufacturing; fatigue; post processing; crack growth; Ti6Al4V; aerospace; additiv tillverkning; 3D-printing; flyg; utmattning; titan;

    Sammanfattning : Laser powder bed fusion (L-PBF) and electron beam powder bed fusion (E-PBF) are two of the most common additive manufacturing (AM) methods which both provide the engineer with a great freedom of design.This means that parts with light weight, multifunctional applications and improved performance could be achieved through innovative design solutions which have attracted a lot of interest from the aerospace industry. LÄS MER

  7. 15. Innovative structural details using high strength steel for steel bridges

    Författare :Oskar Skoglund; John Leander; Raid Karoumi; Mohammad Al-Emrani; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High strength steel; fatigue; steel bridges; steel and concrete composite bridges; innovative steel details; Structural Engineering and Bridges; Bro- och stålbyggnad;

    Sammanfattning : The use of high strength steel has the potential to reduce the amount of steel used in bridge structures and thereby facilitate a more sustainable construction. The amount of steel and what steel grade that can be used in bridge structures and other cyclic loaded structures are often limited by a material degradation process called fatigue. LÄS MER