Sökning: "crack growth"

Visar resultat 1 - 5 av 172 avhandlingar innehållade orden crack growth.

  1. 1. High Strain Fatigue Crack Growth and Crack Closure

    Författare :Michael Andersson; Materialteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; materialteknik; Materiallära; Material technology; crack closure; high strain fatigue; crack grotwh;

    Sammanfattning : Understanding of the growth of fatigue cracks is of utmost importance since such growth often has a profound influence on the life of components subjected to cyclic loading. Thus, reliable fatigue life models enable a more efficient use of materials and improve the performance and efficiency in many applications. LÄS MER

  2. 2. Numerical models of ductile crack growth

    Författare :Annika Trädegård; KTH; []
    Nyckelord :solid mechanics; nonlinear fracture mechanics; elastic-plastic fracture; finite element method; remeshing; constraint; two-parameter characterisation; stable ductile crack growth; cleavage; weibull stress; void growth;

    Sammanfattning : .... LÄS MER

  3. 3. Oxygen Induced High Temperature Crack Growth in Ni-base Superalloys

    Författare :Leif Viskari; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Diffusion; Environmental influence; Crack growth; Atom probe tomography; Electron Microscopy; Deformation; Crack tip oxidation; Hold-time fatigue;

    Sammanfattning : Oxygen induced crack growth is a serious concern for the performance of Ni-base superalloys. These alloys are used in gas-turbine engines where they are exposed to hightemperatures, mechanical loads and oxygen-rich environments. LÄS MER

  4. 4. Initiation and early crack growth in VHCF of stainless steels : Experimental and theoretical analysis

    Författare :Muhammad Waqas Tofique; Jens Bergstöm; Nils Hallbäck; Thierry Pallin-Luc; Karlstads universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Very High Cycle Fatigue; Stainless steel; Ultrasonic fatigue testing; Crack initiation; Crystallographic crack growth; Distributed Dislocation Dipole Technique; Closed cracks; Materialteknik; Materials Engineering;

    Sammanfattning : Mechanical fatigue is a failure phenomenon that occurs due to repeated application of mechanical loads. Very High Cycle Fatigue (VHCF) is considered as the domain of fatigue life greater than 10 million load cycles. LÄS MER

  5. 5. Engineering aspects of fatigue crack growth in metal

    Författare :Tomas Månsson; KTH; []
    Nyckelord :Crack closure; FE-metod; Variable amplitude loading; Fatigue crack propagation.;

    Sammanfattning : .... LÄS MER