Search for dissertations about: "Chalmers University of Technology fatigue"

Showing result 1 - 5 of 9 swedish dissertations containing the words Chalmers University of Technology fatigue.

  2. 1. Influence of combined thermal and mechanical loadings on pearlitic steel microstructure in railway wheels and rails

    Author : Dimitrios Nikas; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Low cycle fatigue LCF ; Wheel steels; Hardness; TEM; Thermal effects; EBSD; Rail steels; Pearlite; Multiaxial fatigue; Spheroidisation; Materials Science;

    Abstract : One of the most important aspects in railway operation is the interaction between rail and wheel. The contact patch between these two components is around the size of a small coin, and since high loads act on this small area, stresses will give rise to wear and damage in both components. READ MORE

  4. 2. Dynamic Train-Turnout Interaction – Mathematical Modelling, Numerical Simulation and Field Testing

    Author : Elias Kassa; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; contact forces; Karhunen–Loève expansion; dynamic train–turnout interaction; field test; wheel–rail contact geometry; stochastic analysis; switches and crossings; SRA - Transport;

    Abstract : Two models for simulation of dynamic interaction between train and turnout are developed. The first one is derived using a commercial software for dynamics of multi-body systems. READ MORE

  5. 3. On some Fatigue Problems Related to Steel Bridges

    Author : Roberto Crocetti; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; modular bridge expansion joints; full-scale testing; web breathing; postbuckling behaviour; fatigue; riveted connections;

    Abstract : This thesis concerns three specific fatigue topics related to steel members in bridges, namely: (1) Modular Bridge Expansion Joints (MBEJs). Several premature fatigue failures of MBEJs have occurred in Europe and USA during the past decades. READ MORE

  6. 4. On improvement of brake discs for heavy vehicles - Experimental testing and material modelling

    Author : Gael le Gigan; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; finite element analysis; cast iron; cracking; drag braking; rig experiment; fatigue; hot spots; brake disc; material testing;

    Abstract : Disc brakes are commonly used in motorcycles, passenger cars, commercial vehicles, heavy-duty vehicles, passenger trains and landing gear of airplanes. Depending on the application, different types of brake discs can be found on the market with numerous designs, geometries and materials. READ MORE

  7. 5. Models and Methods for Analysis and Improvementof Physical Work Environments

    Author : Linda Rose; Roland Örtengren; Mats Ericson; Bengt Nordgren; Per Odenrick; Division of Human Factors Engineering Department of Product abd Production Development Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ergonomics; economics; risk management; work-related personal injuries; construction industry; fatigue reactions; EMG; endurance; recovery; modelling.;

    Abstract : The aim of this thesis concerning work-related personal injuries was to obtain knowledge bases for two purposes. The first was to develop a model, the Ergo-Index, for use when comparing work situations regarding ergonomics and time aspects and choosing the most favourable working method. READ MORE