Sökning: "service curve"

Visar resultat 16 - 20 av 23 avhandlingar innehållade orden service curve.

  1. 16. Fatigue damage mechanisms in polymer matrix composites

    Författare :Kristofer Gamstedt; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymera konstruktionsmaterial; Polymeric Composite Materials;

    Sammanfattning : Polymer matrix composites are finding increased use in structural applications, in particular for aerospace and automotive purposes. Mechanical fatigue is the most common type of failure of structures in service. The relative importance of fatigue has yet to be reflected in design where static conditions still prevail. LÄS MER

  3. 17. Laparoscopy Diagnostic applications in suspected appendicitis and access-related complications

    Författare :Ann-Cathrin Moberg; Kirurgi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Surgery; orthopaedics; complications; laparoscopy; diagnostic laparoscopy; ortopedi; traumatologi; traumatology; Kirurgi;

    Sammanfattning : Laparoscopic surgery was introduced to minimize patient trauma. However, fatal technique specific complications, due to major vascular or visceral injury, were at times seen related to blind abdominal access using the Veress technique. LÄS MER

  4. 18. Microstructural Development of Nanocrystalline Ni- and Co-Based Materilas upon Annealing

    Författare :Melina da Silva; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ni; grain growth; nanocrystalline materials; Co-P; Ni-Fe; thermal stability; TEM in-situ annealing;

    Sammanfattning : Nanocrystalline materials are a relatively new group of materials that are constituted by crystals/grains of a few nanometers in size. Because their mechanical, physical and chemical properties are often superior compared to their microcrystalline counterparts, these materials are attractive for many industrial applications. LÄS MER

  5. 19. Fatigue in Riveted Railway Bridges - A study of the fatigue performance of riveted stringers and stringer-to-floor-beam connections

    Författare :Mohammad Al-Emrani; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This thesis is mainly concerned with two fatigue-related problems in riveted railway bridges. The fatigue life of riveted bridge girders is investigated using a series of fatigue tests performed on full-scale riveted stringers taken from an old riveted railway bridge. LÄS MER

  7. 20. Modelling and experimental evaluation of non-linear fatigue crack propagation in a ductile superalloy

    Författare :Daniel Ewest; Per Almroth; Kjell Simonsson; Björn Sjödin; Daniel Leidermark; Sören Sjöström; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Fatigue life evaluation is an important part in the design process of an industrial gas turbine. The fatigue life can be divided into crack initiation and crack propagation, and not to address the crack propagation part usually yields a non-conservative and overcomplicated design. LÄS MER