Sökning: "railway rail steel"

Visar resultat 21 - 23 av 23 avhandlingar innehållade orden railway rail steel.

  1. 21. Modeling of phase transformations and cyclic plasticity in pearlitic steels

    Författare :Björn Andersson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Phase transformations; TRIP; Pearlitic steel; FEM; Cyclic plasticity; Homogenization;

    Sammanfattning : The low rolling resistance in railway transportation is a key factor for its high efficiency, but it comes at the price of very high contact pressure between the rail and wheel. Due to the high stresses and the large number of load cycles during railway operation, both the rail and the wheel can be susceptible to fatigue crack initiation and propagation. LÄS MER

  3. 22. Essential modelling details in dynamic FE-analyses of railway bridges

    Författare :Mahir Ülker-Kaustell; Raid Karoumi; Guido De Roeck; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Järnvägsgruppen - Infrastruktur; Järnvägsgruppen - Infrastruktur;

    Sammanfattning : The increased need to reduce the use of fossil fuels imposes higher demands on the efficiency of rail transportation. Therefore, an improved knowledge regarding the dynamic properties of railway bridges and infrastructure for railway traffic in general is required. LÄS MER

  4. 23. Railway Wheelsets: Theory, Experiments and Design Considering Temperatures, Stresses and Deformations as Induced by Braking Loads and Contact Forces

    Författare :Mikael Fermér; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Railway wheelset components exposed to braking loads and contact forces have been studied. The work has been performed in close cooperation with the Swedish wheelset manufacturer ABB SURA Traction AB, and it has resulted in one brake disc prototype and two different wheel prototypes. LÄS MER