Sökning: "Johan Sandström"
Visar resultat 1 - 5 av 13 avhandlingar innehållade orden Johan Sandström.
Sammanfattning : The thesis deals with fatigue related issues in the field of railway mechanics. In particular rail breaks and deterioration of insulating joints are investigated. The study is largely motivated by plans to increase allowed axle loads in Sweden. LÄS MER
Sammanfattning : How and why do organizations approach greening? How can we conceptualize approaches and how can we encourage reflexive dialogues on them? These are the main questions addressed in this qualitative study on organizational greening. The study sets off by discussing matters of research philosophy, arguing that our trust in science ought to be revised and that a more postmodern and constructionist philosophy might be a way to go. LÄS MER
Sammanfattning : The thesis deals with some fatigue related problems in railway mechanics related to increased axle loads and speeds. The focus is on defects and discontinuities in the wheel--rail system that affect the risk of fatigue and fracture of railway components such as wheels, rails and insulated joints. LÄS MER
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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