Sökning: "resilient modulus"

Visar resultat 1 - 5 av 9 avhandlingar innehållade orden resilient modulus.

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

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

    Författare :Ricardo de Frias Lopez; KTH.; [2016]
    Nyckelord :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; Civil and Architectural Engineering; Byggvetenskap;

    Sammanfattning : 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. LÄS MER

  2. 2. Moisture Influence on Structural Behaviour of Pavements Field and Laboratory Investigations

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

    Författare :Farhad Salour; KTH.; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Falling Weight Deflectometer FWD ; backcalculation; unbound material; subgrade; seasonal variation; moisture content; spring-thaw; drainage; pavement stiffness; field test; pavement instrumentation; resilient modulus; permanent deformation; repeated load triaxial test; unsaturated soil; matric suction.; Civil and Architectural Engineering; Byggvetenskap; Transportvetenskap; Transport Science;

    Sammanfattning : The structural behaviour of pavements in cold regions can considerably be affected by seasonal variation in environmental factors such as temperature and moisture content. Along with the destructive effect of heavy traffic loads, climatic and environmental factors can considerably contribute to pavement deterioration. LÄS MER

  3. 3. Performance model for unbound grnular materials pavements

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

    Författare :Tatek Fekadu Yideti; KTH.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; unbound granular materials; aggregate; packing theory; gradation; primary structure; secundary structure; permanent deformation; resilient modulus;

    Sammanfattning : Recently, there has been growing interest on the behaviour of unbound granular material in road base layers. Researchers have studied that the design of a new pavement and prediction of service life need proper characterization of unbound granular materials, which is one of the requirements for a new mechanistic design method in flexible pavement. LÄS MER

  4. 4. Characterising the Deformation Behaviour of Unbound Granular Materials in Pavement Structures

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

    Författare :Mohammad Shafiqur Rahman; KTH.; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; unbound granular materials; resilient modulus; permanent deformation; moisture; model; multistage; repeated-load triaxial test; Transportvetenskap; Transport Science; Civil and Architectural Engineering; Byggvetenskap;

    Sammanfattning : Unbound granular materials (UGMs) used in the base and sub-base layers of flexible pavements play a significant role in the overall performance of the structure. Proper understanding and characterization of the deformation behaviour of UGMs in pavement structures are, therefore, vital for the design and maintenance of flexible pavements. LÄS MER

  5. 5. Fullerene-like CNx and CPx Thin Films; Synthesis, Modeling, and Applications

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Andrej Furlan; Linköpings universitet.; Linköpings universitet.; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Phosphorus-carbide CPx ; carbon nitride CNx ; thin films; resilient coatings; magnetron sputtering; theoretical modeling; TECHNOLOGY Engineering physics Material physics with surface physics; TEKNIKVETENSKAP Teknisk fysik Materialfysik med ytfysik;

    Sammanfattning : This Thesis concerns the development of fullerene-like (FL) carbon nitride (CNx) thin films and the discovery of phosphorus-carbide (CPx) compounds. The work dedicated to CPx include first-principles theoretical simulations of the growth and properties of FL-CPx structures. LÄS MER