Sökning: "Johan Sandström"

Visar resultat 6 - 10 av 15 avhandlingar innehållade orden Johan Sandström.

  1. 6. The fracture mechanisms in duplex stainless steels at sub-zero temperatures

    Författare :Johan Pilhagen; Pavel Korzhavy; Rolf Sandström; Kim Wallin; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Duplex stainless steel; Weldments; Delamination; Fracture toughness; Impact toughness; Cleavage fracture; Nickel;

    Sammanfattning : The aim of the thesis was to study the susceptibility for brittle failures and the fracture process of duplex stainless steels at sub-zero temperatures (°C). In the first part of the thesis plates of hot-rolled duplex stainless steel with various thicknesses were used to study the influence of delamination (also known as splits) on the fracture toughness. LÄS MER

  3. 7. Essays on Saving, Borrowing and Intangible Capital

    Författare :Maria Sandström; Nils Gottfries; Johan Lyhagen; Torben Mideksa; David Domeij; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Intangible Capital; Markups; Economic Profit; Household Savings; Pension Reform; Heterogeneous Agents; Monetary Policy Shocks; Economics; Nationalekonomi;

    Sammanfattning : Essay I: Can an increasing importance of intangible capital in the economy explain increases in markups and profits? I use a heterogeneous firm model to show how intangible capital is related to markups and profits at the industry level. The uncertainty and scalability properties of intangible capital imply that firms that succeed in their intangible capital investment can charge high markups relative to other firms, whereas firms that fail will exit. LÄS MER

  4. 8. Towards Digital Product-Service Platforms in Manufacturing Firms : Exploring Organizational and Managerial Aspects

    Författare :Johan Simonsson; Mats Magnusson; Gunilla Sandström; Anders Johansson; Anna Öhrwall Rönnbäck; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Keywords: Servitization; product-service system; digitalization; digital transformation; platform;

    Sammanfattning : This thesis is positioned at the intersection of product and service development and enabling digital technologies in the context of incumbent manufacturing firms. When these concepts are blended together into digital product-service systems, value growth and business model innovation may be achieved. LÄS MER

  5. 9. Development of tools for integrated optimisation and use of aluminium alloys

    Författare :Johan Zander; Rolf Sandström; Bjørn Holmedal; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aluminium alloys; Modelling; Materials optimisation; Mechanical properties; Materials science; Teknisk materialvetenskap;

    Sammanfattning : Commercial alloys are continuously developed to improve their performance. Therefore it is useful to establish new optimisation software, which could be used in development of new materials or in materials selection. LÄS MER

  7. 10. Modelling mechanical properties by analysing datasets of commercial alloys

    Författare :Johan Zander; Rolf Sandström; Stanislaw Zajac; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aluminium alloys; modelling; material optimisation; mechanical properties; solid solution hardening; precipitation hardening; work-hardening; multiple regression; stainless steel; Materials science; Teknisk materialvetenskap;

    Sammanfattning : Commercial alloys are continuously developed to improve their performance. Therefore it is important to develop new optimisation software, which could be used in development of new materials or in materials selection. In this study the mechanical properties which are important in materials selection in mechanical design are investigated. LÄS MER