Sökning: "rolling"

Visar resultat 1 - 5 av 357 avhandlingar innehållade ordet rolling.

  1. 1. Initiation of bacteriophage P2 rolling circle replication

    Författare :Richard Odegrip; Barbara Funnel; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Virus; DNA; Genetics; genetik;

    Sammanfattning : Viruses are very simple entities. In its most simple form, the virus consists of a protein shell containing genetic material. To propagate the virus needs a host to parasitize, in which it can replicate its genetic material and assembly new virus particles. Viruses that parasitize bacteria are termed bacteriophages. LÄS MER

  2. 2. Numerical simulation of shape rolling

    Författare :Stanislav Riljak; Stefan Jonsson; Peter Gudmundson; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; shape rolling; wire-rod rolling; finite-element method; generalized plane-strain; dislocation density; material model; Other materials science; Övrig teknisk materialvetenskap;

    Sammanfattning : In the first part of this thesis, the FE program MSC.Marc is applied for coupled thermomechanical simulations of wire-rod rolling. In order to predict material behaviour of an AISI 302 stainless steel at high strain rates generated during wire-rod rolling, a material model based on dislocation density is applied. LÄS MER

  3. 3. On wear in rolling/sliding contacts

    Författare :Rickard Nilsson; Ulf Olofsson; I. Sherrington; KTH; []
    Nyckelord :Technology; wear; rolling; sliding; contact; environment; TEKNIKVETENSKAP; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : The aim of this thesis is to increase the understanding of wear in rolling/sliding contacts such as the wheel-rail contact for railroads and the roller-washer contact for roller bearings. The Stockholm commuter train network has been the subject of papers A and B in this thesis in which the wear and surface cracks on rails has been observed for a period of three years. LÄS MER

  4. 4. The simulation of car and truck tyre vibrations, rolling resistance and rolling noise

    Författare :Carsten Hoever; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rolling resistance; rolling noise; tyres; vibrations; waveguide finite element; tyre road interac- tion; BEM; fuel efficiency; parameter study; road surface properties; numerical modelling;

    Sammanfattning : The road transportation sector places a severe burden on the environment in the form of CO2 emissions and road traffic noise. Both of these environmental prob- lems can be related to car and truck tyres. LÄS MER

  5. 5. Perception of rolling noise

    Författare :Alice Hoffmann; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Auralization; Rolling Noise; Perception; Tyre Road Noise; Psychoacoustics;

    Sammanfattning : Due to improvements on combustion-engines and electric-engines for cars, tyre noisehas become the prominent noise source at low and medium speeds. Models existthat simulate the noise produced by a rolling tyre, as do models that auralize differenttraffic situations from a basic data set. LÄS MER