Sökning: "cracks"

Visar resultat 21 - 25 av 468 avhandlingar innehållade ordet cracks.

  1. 21. Wood fingerprint recognition and detection of thin cracks

    Författare :Tobias Pahlberg; Olle Hagman; Matthew Thurley; Michael Felsberg; Luleå tekniska universitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Träteknik; Wood Science and Engineering;

    Sammanfattning : The first part of this thesis deals with recognition of wood fingerprints extracted from timber surfaces. It presents different methods to track sawn wood products through an industrial process using cameras. LÄS MER

  3. 22. Fracture analysis of cracks related to rock fragmentation

    Författare :Finn Ouchterlony; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  4. 23. Nonlinear Interaction Between Ultrasonic Waves and Cracks and Interfaces

    Författare :Milan Poznic; Leif Kari; Bruce Drinkwater; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ultrasonic waves; crack; modulation; rough interface; partially closed; surface-breaking; fluid-filled; Acoustics; Akustik;

    Sammanfattning : The subject of this thesis is the development of new ultrasound inspection techniques for detection of cracks that are smaller than the wavelength of the inspecting wave and the characterization of cracks in fluid-filled pipes as either surface-breaking or subsurface. The spectrum of the scattered field of a partially closed crack comprises harmonic components not expected to be found in the case of linear scatterers such as pores or inclusions. LÄS MER

  5. 24. Interaction between ultrasonic waves and nonlinear cracks and interfaces

    Författare :Milan Poznic; Claudio Pecorari; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Acoustics; Akustik;

    Sammanfattning : .... LÄS MER

  7. 25. Deformation and Fatigue Behaviour of Porous and Dense Austenitic Stainless Steel

    Författare :Ulf Lindstedt; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mechanical properties; austenitic stainless steel; PM steel; nitrogen; small cracks; previous particle boundaries; microplasticity; grain size dependence; fatigue; porosity;

    Sammanfattning : PM stainless steels are increasing in use and are expected to do so in the future. A lot of work has been carried out concerning production and sintering of stainless steel powders and on the resulting corrosion behaviour. The deformation behaviour of these materials is less studied. LÄS MER