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Showing result 1 - 5 of 50 swedish dissertations matching the above criteria.

  1. 1. Automatic Quality Monitoring in GMA Welding using Signal Processing Methods

    University dissertation from Department of Production and Materials Engineering, LTH, Lund University

    Author : Stefan Adolfsson; [1998]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material technology; F; Signal Processing; Automatic Quality Monitoring; GMA welding; Materiallära; materialteknik;

    Abstract : An ongoing continuous process of automatization of the production lines is used in industry to reduce production costs. Automatization of quality control should be seen as part of a cost reduction process, as well as of quality control of the welding. READ MORE

  2. 2. Modelling of Granular Materials

    University dissertation from Department of Production and Materials Engineering, LTH, Lund University

    Author : Aylin Ahadi; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hydraulic engineering; Civil engineering; materialteknik; Materiallära; Material technology; binary mixture model; simulations; material modelling; finite element; granular materials; offshore technology; soil mechanics; Väg- och vattenbyggnadsteknik;

    Abstract : The aim of this doctoral study is to develop and implement a material model for granular materials. The course of this work was concentrated upon a non-associated plasticity model with yield surface and the flow potential expressed in terms of the mean stress p and the third stress invariants I3. READ MORE

  3. 3. Studies of moisture and alkalinity in self-levelling flooring compounds

    University dissertation from Division of Building Materials, LTH, Lund University

    Author : Anders Anderberg; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; alkalinity; SLC; floor screed; moisture transport; self-levelling flooring compound; Material technology; diffusion coefficient; materialteknik; Materiallära; secondary emissions; sorption isotherm;

    Abstract : In recent decades there has been an increasing interest in the indoor environment and its connections with public health. One important topic discussed has been the relation between the moisture in buildings and health. Cementitious materials, when cast, contain excess water since this is necessary for workability and for flow properties. READ MORE

  4. 4. Macro-Geometric Defects, A numerical and experimental study of springback and surface defects

    University dissertation from Division of Building Materials, LTH, Lund University

    Author : Alf Andersson; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Simulation; Sheet-metal forming; Finite element analysis; Information exchange; Springback; Surface defects; Drawbead; Process analyse; Optimisation; materialteknik; Materiallära; Material technology;

    Abstract : Today, shortened lead-times in the automotive industry have dramatically increased the need for more efficient development methods at every stage of the process development chain. In order to decrease the long lead-time for producing a forming tool, sheet-metal-forming simulation was introduced. READ MORE

  5. 5. Fatigue behaviour of a nickel based superalloy

    University dissertation from Henrik Andersson, Materials Engineering, BOX 118, SE - 221 00 LUND, SWEDEN

    Author : Henrik Andersson; [2002]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; materialteknik; Materiallära; Material technology; Bodner-Partom; Fatigue; High temperature;

    Abstract : This thesis deals with different aspects of fatigue crack propagation in IN718. The ultimate objective of the work is to gain understanding of the fatigue process, from the macroscopic stress-strain relations to microscopic fatigue crack growth mechanisms. READ MORE