Sökning: "1402-1544"

Visar resultat 11 - 15 av 1573 avhandlingar innehållade ordet 1402-1544.

  1. 11. Imaging and analysis methods for automated weld inspection

    Författare :Patrik Broberg; Tadeusz Stepinski; Högskolan Väst; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Welding; materials; Manufacturing and materials engineering; Produktions- och materialteknik; Experimental Mechanics;

    Sammanfattning : All welding processes can give rise to defects, which weakens the joint and can eventually lead to the failure of the welded structure. In order to inspect welds for detects, without affecting the usability of the product, non-destructive testing (NDT) is needed. LÄS MER

  3. 12. Microstructure model for Ti-6Al-4V used in simulation of additive manufacturing

    Författare :Corinne Charles Murgau; Lars-Erik Lindgren; Niklas Järvstråt; Robert Pederson; Sören Sjöström; Högskolan Väst; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Titanium alloy; Ti-6Al-4V; Welding; Metal deposition; Additive manufacturing; Wire feed; Finite Element Method; Microstructure model; Johnson-Mehl-Avrami- Kolmogorov; Thermally driven; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik; Material Mechanics;

    Sammanfattning : This thesis is devoted to microstructure modelling of Ti-6Al-4V. The microstructure and the mechanical properties of titanium alloys are highly dependent on the temperature history experienced by the material. The developed microstructure model accounts for thermaldriving forces and is applicable for general temperature histories. LÄS MER

  4. 13. Studies on Industrial-Scale Thermal Modification of Wood

    Författare :Ola Dagbro; Lidia Gurau; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Forestry and Wood Technology; Skog och träteknik; Wood Physics;

    Sammanfattning : Wood as a raw material is useful for many purposes even though some properties are less than optimal, for example, dimensional stability and durability. These characteristics can however be improved by different treatment methods. LÄS MER

  5. 14. Managing the Collaborative Front End of Innovation in Manufacturing Firms : Requirements, Capabilities, and Conditions

    Författare :Fabio Gama; Johan Frishammar; David Sjödin; Vinit Parida; Anders Fundin; Luleå tekniska universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Entreprenörskap och innovation; Entrepreneurship and Innovation; front end of innovation;

    Sammanfattning : The front end of innovation is critical to innovative efforts in firms yet it remains to be poorly understood. This especially important since innovation efforts in the front end are becoming increasingly open in line with the era of open innovation. LÄS MER

  7. 15. Flowability and proportioning of cementitious mixtures

    Författare :Yahya Ghasemi; Mats Emborg; Andrzej Cwirzen; Martin Nilsson; Stefan Jacobsen; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Particle packing; excess layer theory; mix design; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : Understanding the role of constituents of cementitious mixtures as the most globally used human-made material and their effect on the flowability of the blends is of great importance. A comprehensive understanding of the ingredients of mixtures allows for optimized proportioning of constituents and can lead to a reduction in cement and water demand of the blends. LÄS MER