Sökning: "numerical bond model"

Visar resultat 6 - 10 av 26 avhandlingar innehållade orden numerical bond model.

  1. 6. Models for analysis of shotcrete on rock exposed to blasting

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

    Författare :Lamis Ahmed; KTH.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Shotcrete; Rock; Vibration; Stress waves; Numerical analysis.; Sprutbetong; Berg; Vibrationer; Spänningsvågor; Numerisk analys.;

    Sammanfattning : In underground construction and tunnelling, the strive for a more time-efficient construction process naturally focuses on the possibilities of reducing the times of waiting between stages of construction. The ability to project shotcrete (sprayed concrete) on a rock surface at an early stage after blasting is vital to the safety during construction and function of e. LÄS MER

  2. 7. Analyses of shotcrete stress states due to varying lining thickness and irregular rock surfaces

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

    Författare :Andreas Sjölander; KTH.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Shotcrete; cracking; shrinkage; block load; varying thickness; numerical simulations; fibre reinforcement; Civil and Architectural Engineering; Byggvetenskap;

    Sammanfattning : Shotcrete is sprayed concrete applied pneumatically under high pressure and was invented in the beginning of the 1900's. This new technique decreased the construction time and since steel fibres were introduced in the shotcrete during the 1970's, shotcrete has been the primary support method for tunnels. LÄS MER

  3. 8. Experimental and numerical studies of intralaminar cracking in high performance composites

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Mohamed Sahbi Loukil; Luleå tekniska universitet.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymera konstruktionsmaterial; Polymeric Composite Materials;

    Sammanfattning : The macroscopic failure of composite laminates subjected to tensile increasing load is preceded by initiation and evolution of several microdamage modes. The most common damage mode and the one examined in this thesis is intralaminar cracking in layers. LÄS MER

  4. 9. Numerical studies of spin chains and cold atoms in optical lattices

    Detta är en avhandling från Stockholm : KTH

    Författare :Sara Bergkvist Sylvan; KTH.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Teoretisk Fysik; Kondenserade materiens teori; NATURAL SCIENCES Physics Condensed matter physics; NATURVETENSKAP Fysik Kondenserade materiens fysik;

    Sammanfattning : An important, but also difficult, research field in condensed matter physics is that of strongly correlated systems. This thesis considers two topics in this field.The first topic is disorder and frustration in spin models. The introduction of disorder into quantum spin chains creates a complex problem. LÄS MER

  5. 10. Numerical analysis of concrete elements strengthened with carbon fiber reinforced polymers

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Joakim Lundqvist; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : Due to the growing number of ageing reinforced concrete structures such as buildings and bridges, there is an increasing interest in condition assessment and strengthening methods. Deterioration processes and demands for higher loads contribute to this interest. LÄS MER