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Dr Si Thu Kyaw

Lecturer in Mechanical, Materials and Design Engineering


Summary

Dr Si Thu Kyaw joined Sheffield Hallam University in 2016 as a lecturer in Mechanical, Materials and Design Engineering group. Prior to this post, he was a postdoctoral researcher at University of Nottingham where he received BEng (1st class honours) in 2009 and PhD in 2013 respectively.

Si Thu has extensive knowledge in finite element analysis (FEA). He has been involved in projects concerning structural integrity and lifetime analyses of power plant components using FEA.

About

After completing his PhD studies, Si Thu has been carrying out research in structural integrity of power plant components. His PhD was fully funded by EPSRC and supported by leading UK engineering companies including Rolls Royce, E-On and EDF energy. The title of the thesis is 'Finite element modelling of stresses and failure within plasma spray thermal barrier coating systems'. His PhD has produced several peer-reviewed journals.

His post-PhD research areas include failure and lifetime analysis of irradiated nuclear graphite bricks and creep-fatigue damage modelling of power plant steels. He has collaborated externally with researchers from leading UK universities and industries.

Si Thu has been teaching at SHU since 2016 and covers modules related to FEA and solid mechanics. He also supervises Final year projects and has track record in supporting students to achieve their full potential.

Areas of Interest:
• Non linear FEA;
• High temperature fatigue and creep interaction of flexible power plant steels;
• Damage and life prediction of engineering structures;
• Elastic plastic analysis of multiphase materials.

Teaching

Department of Engineering and Mathematics

Business, Technology and Enterprise

Subject Area/Group: Mechanical, Materials and Design Engineering.

Modules:
- Principles of solid mechanics and dynamics (Level 4); MEng/BEng Mechanical Engineering, MEng/BEng Mechanical Engineering (Materials and Manufacture);
- Vehicle dynamics and structural analysis (Level 6), MEng/BEng Automotive Engineering;
- Structural mechanics and FEA (Level 6); MEng/BEng Mechanical Engineering, MEng/BEng Mechanical Engineering (Materials and Manufacture);
- Applied Fatigue and Fracture Mechanics (Level 7), Mixed cohort (MEng Mechanical, Aerospace Engineering + MSc Material Science);
- Applied Solid Mechanics and Dynamics (Level 5); MEng/BEng Mechanical Engineering, MEng/BEng Mechanical Engineering (Materials and Manufacture);
- Advanced FEA (Level 7); MEng/BEng Mechanical Engineering, MEng/BEng Mechanical Engineering (Materials and Manufacture).

Research

Current Projects:
EPSRC Flex-E plant: Flexible and Efficient Power Plant: Flex-E-Plant
Model high temperature creep-fatigue damage of power plant steels. Estimate thermo-mechanical fatigue lifetime of steels and validate against experimental data.

Selected/Past Projects:
EPSRC SuperGen2: Conventional Power Plant Lifetime Extension Consortium (PhD project)
Carried out numerical stress analysis of thermal barrier coating system using novel multiphase material model. The model was validated in collaboration with University of Bristol.
EPSRC Fun.Graphite: Fundamentals of current and future uses of nuclear graphite
Conducted FE stress analysis and fracture simulation of irradiated nuclear graphite bricks.

Collaborators and Sponsors:
- University of Bristol;
- Loughborough University;
- University of Nottingham;
- EDF Energy;
- Rolls-Royce Plc;
- Siemens.

Publications

Journal articles

Rouse, J.P., Zacharzewski, P., Hyde, C.J., Jefferson-Loveday, R., Morris, A., & Kyaw, S. (2018). A case study investigation into the effects of spatially dependent convection coefficients on the fatigue response of a power plant header component. International Journal of Fatigue, 113, 137-148. http://doi.org/10.1016/j.ijfatigue.2018.03.032

Kyaw, S., Jones, A., Jepson, M.A.E., Hyde, T., & Thomson, R.C. (2017). Corrigendum to “Effects of three-dimensional coating interfaces on thermo-mechanical stresses within plasma spray thermal barrier coatings” [Mater. Des. 125 (2017) 189–204] (S0264127517303234) (10.1016/j.matdes.2017.03.067)). Materials and Design, 131, 509. http://doi.org/10.1016/j.matdes.2017.07.015

Hashim, A., Kyaw, S., & Sun, W. (2017). Modelling fracture of aged graphite bricks under radiation and temperature. Nuclear Materials and Energy, 11, 3-11. http://doi.org/10.1016/j.nme.2017.03.038

Kyaw, S., Jones, A., Jepson, M.A.E., Hyde, T., & Thomson, R.C. (2017). Effects of three-dimensional coating interfaces on thermo-mechanical stresses within plasma spray thermal barrier coatings. Materials & Design, 125 (5), 189-204. http://doi.org/10.1016/j.matdes.2017.03.067

Kyaw, S., Rouse, J.P., Lu, J., & Sun, W. (2016). Determination of material parameters for a unified viscoplasticity-damage model for a P91 power plant steel. International Journal of Mechanical Sciences, 115-6, 168-179. http://doi.org/10.1016/j.ijmecsci.2016.06.014

Karunaratne, M.S.A., Kyaw, S., Jones, A., Morrell, R., & Thomson, R.C. (2016). Modelling the coefficient of thermal expansion in Ni-based superalloys and bond coatings. Journal of Materials Science, 51 (9), 4213-4226. http://doi.org/10.1007/s10853-015-9554-3

Kyaw, S., Jones, I.A., & Hyde, T.H. (2016). Simulation of failure of air plasma sprayed thermal barrier coating due to interfacial and bulk cracks using surface-based cohesive interaction and extended finite element method. Journal of Strain Analysis for Engineering Design, 51 (2), 132-143. http://doi.org/10.1177/0309324715615746

Kyaw, S., Sun, W., & Becker, A.A. (2015). Effects of compositions of filler, binder and porosity on elastic and fracture properties of nuclear graphite. Journal of Nuclear Materials, 457, 42-47. http://doi.org/10.1016/j.jnucmat.2014.10.071

Wadsworth, M., Kyaw, S., & Sun, W. (2014). Finite element modelling of the effect of temperature and neutron dose on the fracture behaviour of nuclear reactor graphite bricks. Nuclear Engineering and Design, 280, 1-7. http://doi.org/10.1016/j.nucengdes.2014.10.009

Liu, D., Kyaw, S., Flewitt, P.E.J., Seraffon, M., Simms, N.J., Pavier, M., & Jones, I.A. (2014). Residual stresses in environmental and thermal barrier coatings on curved superalloy substrates: Experimental measurements and modelling. Materials Science and Engineering: A, 606, 117-126. http://doi.org/10.1016/j.msea.2014.03.014

Li, S., Kyaw, S., & Jones, A. (2014). Boundary conditions resulting from cylindrical and longitudinal periodicities. Computers & Structures, 133, 122-130. http://www.sciencedirect.com/science/article/pii/S0045794913003234

Kyaw, S., Jones, A., & Hyde, T. (2013). Predicting failure within TBC system: Finite element simulation of stress within TBC system as affected by sintering of APS TBC, geometry of substrate and creep of TGO. Engineering Failure Analysis, 27, 150-164. http://doi.org/10.1016/j.engfailanal.2012.07.005

Conference papers

Kyaw, S., Rouse, J.P., Lu, J., & Sun, W. (2016). Effects of surface roughness on thermo-mechanical fatigue life of a P91 power plant steel. Procedia Structural Integrity, 2, 664-672. http://doi.org/10.1016/j.prostr.2016.06.086

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