Essays about: "Dispersive stresses"

Found 5 essays containing the words Dispersive stresses.

1. 1. Life and fracture in very high cycle fatigue of a high strength steel

   University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

   Author : Daniel Karlsson; [2021]
   Keywords : Very high cycle fatigue; VHCF; Fractography; Fine granular area; FGA; High strength tool steel; Ultrasonic testing equipment;

   Abstract : Classical fatigue models teach that there is an intrinsic fatigue limit for steels, representing a level of stress that is too low for regular crack growth where every cyclic load propagates a fatigue crack through the material. Modern application with extreme lifetimes has shown that fatigue will still take place in steels with stress levels well below the expected fatigue limit. READ MORE

3. 2. Investigation of Metallic Dust formed on Steel Substrates in Solar Cell Sputtering Chambers

   University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Author : Jakob Friberg; [2019]
   Keywords : Sputtering; iron selenide; CIGS; solar cell; dust;

   Abstract : Investigations have been done as of why dust particles appear in a circular pattern on the backside of solar cells produced in sputtering chambers at Midsummer AB. An experimental approach was conducted, where solar cells were produced at standard conditions and their backside studied by material analytical methods. READ MORE

4. 3. 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

5. 4. Simplified modeling of wind-farm flows

   University essay from KTH/Strömningsfysik

   Author : Raphael Ebenhoch; [2015]
   Keywords : Wind tunnel; Blockage effect; Numerical wake model; Linearized RANS; Linearized actuator-disc theory; Internal boundary layer; Dispersive stresses; Simplied CFD model;

   Abstract : Abstact: In order to address the wind-industry's need for a new generation of more advanced wake models, which accurately quantify the mean flow characteristics within a reasonably CPU-time, the two-dimensional analytical approach by Belcher et al. (2003) has been extended to a three-dimensional wake model. READ MORE

6. 5. An Experimental Investigation of Wind-farm Flows

   University essay from KTH/Mekanik

   Author : Blas Muro; [2014]
   Keywords : ;

   Abstract : In this thesis, fundamental properties of the turbulent ow above di erent wind-farm models were determined by means of wind-tunnel measurements. The assessed wind farms consisted in two staggered congurations, and two inline congurations, where two di erent streamwise spacings were evaluated. READ MORE