Sökning: "wheel flats"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden wheel flats.

  1. 1. Out-of-Round Railway Wheels - Literature Survey, Field Tests and Numerical Simulations

    Detta är en avhandling från Chalmers University of Technology

    Författare :Anders Johansson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2003]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk mekanik; Engineering mechanics; wheel out-of-roundness; wheel polygonalization; impact loads; impact load detectors; wheel flats; wheel removal criteria; full-scale measurements; wear modelling; FASTSIM; dynamic train-track interaction;

    Sammanfattning : .... LÄS MER

  2. 2. Martensite formation in railway wheel flats

    Detta är en avhandling från Chalmers University of Technology

    Författare :Johan Jergeus; Chalmers tekniska högskola.; Chalmers University of Technology.; [1994]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : .... LÄS MER

  3. 3. Railway Wheel Flats. Martensite Formation, Residual Stresses, and Crack Propagation

    Detta är en avhandling från Chalmers University of Technology

    Författare :Johan Jergeus; Chalmers tekniska högskola.; Chalmers University of Technology.; [1998]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk mekanik; Engineering mechanics; railway wheel flats; sliding contact; spalling; tread damage; thermal shock; phase transformations; martensite formation; residual stresses; constitutive modelling; transformation plasticity; crack propagation; full-scale field experiments; metallographic investigation;

    Sammanfattning : A railway wheel flat is a flat spot on the rolling surface of a wheel caused by its unintentional sliding on the rail. The reason for the sliding may be poorly adjusted, frozen or defect brakes, or too high braking forces in relation to the available wheel/rail adhesion. LÄS MER

  4. 4. Out-of-Round Railway Wheels - Causes and Consequences

    An Investigation Including Field Tests, Out-of-Roundness Measurements and Numerical Simulations

    Detta är en avhandling från Chalmers University of Technology

    Författare :Anders Johansson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk mekanik; Engineering mechanics; railway wheel out-of-roundness; polygonalization; corrugation; wheel flat; impact load detector; wheel removal criterion; full-scale measurements; wear modelling; dynamic train-track interaction;

    Sammanfattning : Causes and consequences of out-of-round railway wheels are investigated through literature studies, full-scale field experiments, out-of-roundness measurements, and numerical simulations. Both defects around the complete wheel circumference (e.g. polygonal wheels with wavelengths up to one wheel circumference) and local defects (e. LÄS MER

  5. 5. Analysis of rail breaks and insulated joint deterioration

    Detta är en avhandling från Chalmers University of Technology

    Författare :Johan Sandström; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk mekanik; Engineering mechanics; Railway mechanics; Material fatigue; Rail breaks; Wheel flats; Insulated joints; Heavy Haul;

    Sammanfattning : The thesis deals with fatigue related issues in the field of railway mechanics. In particular rail breaks and deterioration of insulating joints are investigated. The study is largely motivated by plans to increase allowed axle loads in Sweden. LÄS MER