Sökning: "arc-length"

Visar resultat 1 - 5 av 8 avhandlingar innehållade ordet arc-length.

  1. 1. Iterative and adaptive solution techniques in computational plasticity

    Författare :Lars Bernspång; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; finite elements; arc-length; computational plasticity; solution technique; adaptive; error; iterative; Structural Engineering;

    Sammanfattning : .... LÄS MER

  3. 2. Numerical methods and multi-scale modeling for phase-field fracture - With applications in linear elastic and poro-elastic media

    Författare :Ritukesh Bharali; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; fracture; multiphysics; finite element; multiscale; desiccation; solvers; fracking; phase-field; solution techniques;

    Sammanfattning : This thesis presents novel numerical methods and a multi-scale modelling framework tailored for advancing the phase-field fracture model with applications in linear elastic and poro-elastic media. In the realm of the numerical methods, the focus lies on devising computationally efficient and robust monolithic solution techniques. LÄS MER

  4. 3. Path-planning with obstacle-avoiding minimum curvature variation B-splines

    Författare :Tomas Berglund; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industriell elektronik; Industrial Electronics;

    Sammanfattning : We study the general problem of computing an obstacle-avoiding path that, for a prescribed weight, minimizes the weighted sum of a smoothness measure and a safety measure of the path. We consider planar curvature-continuous paths, that are functions on an interval of a room axis, for a point-size vehicle amidst obstacles. LÄS MER

  5. 4. Torsional vibration absorbers in heavy-duty truck powertrains

    Författare :Lina Wramner; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; friction; driveline; torsional vibrations; dual mass flywheel; PSVA; powertrain; tuned vibration absorber; power split vibration absorber; heavy-duty truck; simulations; anti-resonance; resonances; TVA; DMF;

    Sammanfattning : The heavy-duty vehicle manufacturers face large challenges when it comes to reducing CO2 emissions from vehicles. The ongoing development of more efficient combustion engines leads to an increase in torsional vibrations. LÄS MER

  7. 5. Aspects of the recursive projection method applied to flow calculations

    Författare :Joakim Möller; Jesper Oppelstrup; Per Weinerfelt; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Datorteknik; applied mechanics; computer science; aerospace; Datorteknik; Computer engineering; Datorteknik;

    Sammanfattning : In this thesis, we have investigated the Recursive Projection Method, RPM, as an accelerator for computations of both steady and unsteady flows, and as a stabilizer in a bifurcation analysis.The criterion of basis extraction is discussed. LÄS MER