Entwicklung von Kontaktmodellen für die Diskrete-Elemente-Methode

Translated title of the contribution: Development of contact models for the Discrete Element Method

Alexander Becker

    Research output: ThesisDiploma Thesis


    The computer aided simulation of bulk materials is a complex field of research that gains more important in the design, optimization and error analysis of technical systems. In a simulation the reality is simplified by model assumptions. Depending on the used calculation model, the boundary conditions are more or less limited which in turn directly affects the quality of the results. Therefore a great emphasis should be placed on the development and investigation of these calculation models in future. As a consequence this thesis deals with the development of new contact models for the simulation of cohesive and non-cohesive bulk materials. For this reason, existing computational models based on the Hertz-Mindlin model of the discrete element method are supplemented by the mechanisms of static, sliding and rolling friction. In addition to the complex mechanisms of friction the established damping models had also been developed further in order to reproduce the behavior of real bulk materials with a higher accuracy. For the implementation of these new computing models, it is necessary to understand the fundamentals and complex principles of modern particle simulations. In the last step the newly developed contact models are verified with simulations using the discrete element method and practical tests. For the verification of the virtual bulk material, a suitable test rig was designed. The results of this research make it possible to simulate a wide variety of bulk solids considering important physical effects while achieving more accurate results. With the modified contact models it is now possible to precisely predict the dynamic behavior of bulk materials in conveying and technical systems.
    Translated title of the contributionDevelopment of contact models for the Discrete Element Method
    Original languageGerman
    • Kessler, Franz, Supervisor (internal)
    • Morak, Hans, Co-Supervisor (internal)
    Award date4 Apr 2014
    Publication statusPublished - 2014

    Bibliographical note

    embargoed until 11-03-2019


    • Discrete Element Method
    • Particle simulation
    • Bulk materials simulation
    • Contact models

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