Solid Mechanics Master Thesis Project to Siemens
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Place of work: Finspång
Organization: Siemens Industrial Turbomachinery AB,
www.siemens.seSolid Mechanics Master Thesis Project at Siemens Industrial Turbomachinery Gas Turbine development department in Finspång, Sweden
Title: "Preliminary life evaluations on polycrystalline alloys using simulations on FE-models in which each grain is an anisotropic single crystal and the grains are randomly distributed"
The first target:
• To understand how the correlation between global and local (on the grain level) strains are affected by e.g. the grain size.
• Other investigations of interest are also enabled by such FE-modelling and might be a part of the project, depending on how things proceed.
The inspiration comes from a presentation at the recent LCF8-conference in Dresden. The stress concentrations associated with grain boundaries may be more severe than those from drilled holes, which explains why cracks do not always start at such holes during cyclic testing.
The task:
To run Monte Carlo-simulations using a large number of randomly generated polycrystals to study how the strain is distributed. We should try to quantify:
• The probability of getting strain over a pre-set (high) strain value in a specific volume and
• The probability of being above a preset (not as high) strain in a specified volume fraction
The FE-models are to be generated with the code Neper.
Eventually, we hope to be able to estimate the probability that an unfavorable grain boundary is combined with a global strain concentration in a component. This could form the basis for a probabilistic crack initiation model. Such a model could take the measured grain size distribution from a cast component as input (i.e. while the local grain orientation is random, the global distribution of grain size is 'deterministically governed' by the component geometry and the fixed casting parameters). This would be a physically motivated notch effect model.
About Siemens:
Siemens is a global technology powerhouse that has stood for engineering excellence, innovation, quality, reliability and internationality for more than 165 years. The company is active in more than 200 countries and have about 350 000 employees worldwide and is focusing on the areas of electrification, automation and digitalization. In Sweden, Siemens has been present since 1893 and has about 4,200 employees in about 40 locations, with headquarter in Solna from November. In the last fiscal year (2016), sales for Siemens Sweden were approximately SEK 17 billion. Our core values ??that make us unique - Responsible, Excellent and Innovative - are not new; they have been our guiding stars in our best decisions during all these years. At Siemens there is a pronounced and well-established policy for diversity at the workplace. We offer the same opportunities for everyone and we see diversity as an asset, because different backgrounds and life experience among our employees increase the dynamics of the group. Diversity increases the ability to see things differently and find new, innovative ways to solve our challenges. Further information is available on
www.siemens.com.Varaktighet, arbetstid
Heltid Fast anställning tills vidare
Publiceringsdatum2017-11-23ErsättningFast lön
Så ansöker duSista dag att ansöka är 2017-12-09
Klicka på denna länk för att göra din ansökanFöretagSiemens
AdressSiemens
Slottsvägen 2
61231 Finspång
KontorsadressSlottsvägen 2, Finspång
Jobbnummer 3818096
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