Essays about: "thermal cracking"

Showing result 21 - 25 of 31 essays containing the words thermal cracking.

  1. 21. Degradation mechanisms of UN and UN–10U3Si2 pellets of varying microstructure by comparative steam oxidation experiments

    University essay from KTH/Reaktorfysik

    Author : Selim Uygur; [2016]
    Keywords : Uranium Mononitride; Uranium Silicide; Composite; Steam degradation; corrosion mechanism;

    Abstract : During an extended LOCA in a LWR, the current UO2 fuel reaches very high temperatures and eventually melts, while the current Zircaloy fuel cladding oxidizes releasing hydrogen. These two consequences can lead to an unacceptable amount of radioactive release by presenting accident routes for containment failure. READ MORE

  3. 22. Investigation of the frost resistance in bacteria treated self-healing concrete

    University essay from Lunds universitet/Avdelningen för Byggnadsmaterial

    Author : Karin Persson; [2016]
    Keywords : Concrete; Hydraulic Structures; Hydro Power; Frost Resistance; Self- healing; Bacteria; Precipitation; Calcium Carbonate Betong; Vattenbyggnader; Vattenkraft; Frostbeständighet; Självläkn- ing; Bakterier; Utfällning; Kalciumkarbonat; Technology and Engineering;

    Abstract : Vattenkraften står för hälften av vårt elbehov i Sverige idag. Merparten av vattenkraftverken är gjutna i betong och som många andra betongkonstruktioner så drabbas betongen av sprickbildning av olika orsaker. För vattenkraften är genomgående sprickor ett problem då dessa skapar läckage. READ MORE

  4. 23. Numerical analyses of concrete buttress dams to design dam monitoring

    University essay from KTH/Betongbyggnad

    Author : Daniel Svensen; [2016]
    Keywords : Concrete; buttress dams; thermal effects; finite element analysis; instrumentation; alarm values; alert values; Betong; lamelldammar; termiska effekter; finit element analys; intstrumentering; larmvärden;

    Abstract : Old concrete buttress dams are sensitive to cracking if exposed to large temperature variations. The cracks can make dams sensitive to failure, depending on the size and location of the cracks. These problems can be overcome by lowering the temperature variations and stabilizing the dams. READ MORE

  5. 24. Cracking Assessment of Concrete Slab Frame Bridges Exposed to Thermally Induced Restraint Forces

    University essay from KTH/Betongbyggnad

    Author : Jonatan Ledin; Christensen Oskar; [2015]
    Keywords : Concrete slab frame bridges; Restraint forces; Thermal actions; Non linear FE analysis;

    Abstract : The usage of linear 3D FEA is widespread within the bridge design community, and although this tool provides substantial benefits in the design process, there are certain practical issues related to the application of this analysis tool. A situation in which such an issue prevails is when linear 3D FEA is used to analyze restraint forces due to thermal shrinkage or expansion in concrete slab frame bridges. READ MORE

  6. 25. Weld Quality in Aluminium Alloys

    University essay from Uppsala universitet/Tillämpad materialvetenskap

    Author : Rujira Ninni Deekhunthod; [2014]
    Keywords : Weld Aluminium Alloys MIG MAG;

    Abstract : The aims of this project are to present an understanding in what happens when aluminium-(Al) alloys are welded, and to investigate how the Mg-, Si- and Cr-contents in AA6005A influence the weld strength and cracking susceptibility. It is known that heat from welding affects the mechanical properties (strength) of the material. READ MORE