Sökning: "short cracks"

Visar resultat 11 - 15 av 26 uppsatser innehållade orden short cracks.

1. 11. Environmental stress of electrical machine winding insulation

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

   Författare :Martin Risemark Eriksson; [2017]
   Nyckelord :;

   Sammanfattning : The conducting winding of an electrical machine is insulated in order to prevent any short circuits to occur within the machine. This insulation is during its lifetime exposed to several environmental stresses and therefore plays an important role in the life length of the machine. LÄS MER

3. 12. Reinforced Concrete Subjected To Restraint Forces : A comparison with non-linear numerical analyses

   Master-uppsats, KTH/Bro- och stålbyggnad

   Författare :Niels Brattström; Oliver Hagman; [2017]
   Nyckelord :Restraint forces; concrete; cracking; restraint degree; crack width; creep; thermal actions; shrinkage; Tvångskrafter; betong; sprickor; inspänningsgrad; sprickvidder; krypning; termisk last; krympning;

   Sammanfattning : In Sweden, it is Eurocode 2 which forms the basis for performing a design of concrete structures, in which methods can be found treating the subject of restrained concrete members and cracking in the serviceability limit state. In the code, both detailed hand calculations procedures as well as simplified methods are described. LÄS MER

4. 13. Overlay welding of FeCrAl alloys

   Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

   Författare :Lezan Rashid; [2016]
   Nyckelord :Overlay welding; FeCrAl; TIG; MIG; welding evaluation;

   Sammanfattning : In this master thesis different overlay welding methods suitable for boiler application has been investigated. The purpose of this project is to define advantages and disadvantages for each overlay welding methods and suggest some evaluation criteria on some commercial and experimental alloys aimed for overlay welding material. LÄS MER

5. 14. Palaeoenvironments of the Earliest (Middle Devonian) Tetrapod Trackways from the Holy Cross Mountains, Poland; Locomotion in a Terrestrial Setting?

   Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Martin Qvarnström; [2015]
   Nyckelord :Tetrapods; palaeoenvironment; trackways; paleosols; microfacies; trace fossils; fin-limb transition; Holy Cross Mountains.;

   Sammanfattning : The palaeoenvironment from which early tetrapods emerged is crucial to comprehend in order to understand the mechanisms that drove and allowed the terrestrialization of vertebrates; one of the most important evolutionary ‘events’ in the history of animals. Nevertheless, much of the terrestrialization is shrouded in obscurity, inter alia, due to scarcity of early tetrapods in the fossil record. LÄS MER

7. 15. Fabrication of a light-weight SOFC using ceramic fibre paper as substrate

   Master-uppsats, Lunds universitet/Centrum för analys och syntes

   Författare :Philip Löfkvist; [2015]
   Nyckelord :inorganic chemistry; solid oxide fuel cell; unmanned aerial vehicle; high temperature heat treatment; yttria stabilized zirconia; ceramic fibre paper; catator; nickel oxide; impregnation; paste manufacturing; ultra-sonication; ball-milling; optical microscopy; materials chemistry; scanning electron microscopy; materialkemi; Technology and Engineering;

   Sammanfattning : A novel method for the fabrication of a light-weight solid oxide fuel cell (SOFC) has been evaluated at Catator. This was conducted in order to lower the weight and thus cost of an unmanned aerial vehicle. The main aim for this thesis was to achieve a thin, dense and crack-free electrolyte using a ceramic fibre paper as substrate. LÄS MER