Sökning: "crack path"

Visar resultat 1 - 5 av 39 avhandlingar innehållade orden crack path.

  1. 1. Behaviour of fracture process zones in concrete influenced by simultaneously applied normal and shear displacements

    Detta är en avhandling från Division of Building Materials, LTH, Lund University

    Författare :Manouchehr Hassanzadeh; [1992]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; softening; mixed mode; fictitious crack model; concrete; deformationer; betong; brottmekanik; hållfasthet; brotthållfasthet; spänningar; skjuvspänningar; sprickor; beräkningsmodeller; brottenergi; teori; laboratorieförsök; interlock; crack path; diagonal crack; microcracking; instability; fracture energy; fracture mechanics; shear; tension; process zone;

    Sammanfattning : The thesis deals with the determination of the post peak behaviour of concrete in pure tension, and combined tension (compression) and shear. A test arrangement has been developed in order to determine the post peak behaviour of concrete expressed as stress - displacement curves. LÄS MER

  2. 2. Modelling of surface initiated rolling contact fatigue crack growth using the asperity point load mechanism

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Dave Hannes; KTH.; [2011]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rolling contact fatigue; spalling; asperity; fatigue crack path; fatigue crack growth; mode I; plane mixed-mode; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : .... LÄS MER

  3. 3. On the Fracture of Thin Laminates

    Detta är en avhandling från Karlskrona : Blekinge Institute of Technology

    Författare :Sharon Kao-Walter; Blekinge Tekniska Högskola.; Malmö University.; [2004]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Laminate; interface; crack; adhesion; crack tip driving force; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap; Technology;

    Sammanfattning : This thesis concerns mechanical and fracture properties of a thin aluminium foil and polymer laminate that is widely used as packaging material. The possibility of controlling the path of the growing crack propagation by adjustment of the adhesion level and the property of the polymer layer is investigated. LÄS MER

  4. 4. Numerical Modelling of Short Fatigue Crack Growth

    Detta är en avhandling från Karlskrona : Blekinge Institute of Technology

    Författare :Per Hansson; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; discrete dislocation; Fatigue; grain boundary; short crack;

    Sammanfattning : Fatigue implies repeated loading and unloading of a structure, and components subjected to fatigue might experience nucleation of cracks, and subsequent crack propagation. This might lead to catastrophic consequences, such as complete failure of a structure. LÄS MER

  5. 5. Finite element procedures for crack path prediction in multi-axial fatigue

    Detta är en avhandling från Karlskrona : Blekinge Institute of Technology

    Författare :Dimosthenis Floros; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mixed-mode; Fracture mechanics; Rolling contact fatigue; Numerical simulation; Configurational forces; Plasticity;

    Sammanfattning : Rolling Contact Fatigue (RCF) cracks in rails are among the most detrimental railway track defects regarding reliability and cost. The cracks typically grow in shear mode up to a certain length at which they might arrest or kink into a more tensile-driven growth. LÄS MER