Search for dissertations about: "diskreta elementmetoden"

Found 4 swedish dissertations containing the words diskreta elementmetoden.

  2. 1. DEM Modelling of Unbound Granular Materials for Transport Infrastructures : On soil fabric and rockfill embankments

    Author : Ricardo de Frias Lopez; Johan Silfwerbrand; Leena Korkiala-Tanttu; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Discrete element method; granular materials; particle-scale behaviour; particle degradation; permanent deformation; resilient modulus; rockfill embankment; soil fabric; Diskreta elementmetoden; grusmaterial; verkningssätt på partikelnivå; nedbrytning; permanent deformation; styvhet; stenfylld bank; skelettstruktur; Transport Infrastructure; Transportinfrastruktur;

    Abstract : Unbound granular materials (UGM) are widely used as load-bearing layers and for embankment construction within transport infrastructures. These play a significant role on operation and maintenance of transportation systems. However, pavement and railway engineering still today rely heavily on empirical models based on macroscopic observations. READ MORE

  4. 2. Granular Materials for Transport Infrastructures : Mechanical performance of coarse–fine mixtures for unbound layers through DEM analysis

    Author : Ricardo de Frias Lopez; Johan Silfwerbrand; Jonas Ekblad; Björn Birgisson; Jörgen Johansson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; discrete element method; force distribution; gap-graded mixtures; granular materials; particle-scale behaviour; permanent deformation; resilient modulus; soil fabric; binära blandningar; diskreta elementmetoden; grusmaterial; kraftöverföring; verkningssätt på partikelnivå; permanent deformation; skelettstruktur; styvhet; Byggvetenskap; Civil and Architectural Engineering;

    Abstract : Granular materials are widely used as unbound layers within the infrastructure system playing a significant role on performance and maintenance. However, fields like pavement and railway engineering still heavily rely on empirically-based models owing to the complex behaviour of these materials, which partly stems from their discrete nature. READ MORE

  5. 3. Discrete element technique for modeling high-speed railway tracks

    Author : Alireza Ahmadi; Stefan Larsson; Carl Wersäll; Liang Cui; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polygonal particles; Direct shear test; Particle scaling; Bal- lasted track; DEM; Polygonala partiklar; direkt skjuvförsök; partikelskalning; ballastspår; DEM; Soil and Rock Mechanics; Jord- och bergmekanik;

    Abstract : The Discrete element method (DEM) is a methodology to investigatethe interactions among granular materials. It analyzes the behavior of par-ticulate environments by solving force-displacement equations that adhereto Newton’s second law of motion. READ MORE

  6. 4. Discrete element modelling of the mechanical behaviour of lithium-ion battery electrode layers

    Author : Axel Lundkvist; Per-Lennart Larsson; Pär Jonsén; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Lithium-ion batteries; mechanical characterisation; simulations; contact mechanics; discrete element method; Litiumjonbatterier; mekanisk karakterisering; simuleringar; kontaktmekanik; diskret elementmetod; Teknisk mekanik; Engineering Mechanics; Solid Mechanics; Hållfasthetslära;

    Abstract : Since their introduction in the late 20th century, lithium-ion batteries have become the leading battery technology for portable devices and electric vehicles due to their high energy density and rechargeability. However, the increasing demand for a longer battery life span is hindered by the fading of the battery’s charge capacity over prolonged use. READ MORE