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The University of Southampton
EngineeringPostgraduate study

Mr Chao You 

Postgraduate research student

Mr Chao You's photo

Mr Chao You is Postgraduate research student within Engineering and Physical Sciences at the University of Southampton.

Chao You received his MSc degree in aerospace engineering at Beijing University of Aeronautics & Astronautics (BUAA) in 2013 after obtaining his BSc at Nanjing University of Aeronautics & Astronautics (NUAA) in 2010. He registered as a PhD student of Engineering Materials Group at the University of Southampton in 2013 under the guidance of Professor Philippa Reed and Dr Mithila Achintha, working on fatigue lifing developments in turbine systems.

Research interests

Fatigue, Shot Peening, Modelling, Turbine System

PhD supervision

Professor Philippa Reed, Dr Mithila Achintha

Research projects

Life assessment is of great importance to component repair and replacement scheduling in turbine systems which experience cyclic start-up and shut-down operations during service life. As vital parts where a severe stress concentration exists, the fir tree blade-disc interfaces are typically shot peened. Their fatigue resistance is considered to be improved subsequently due to the surface compressive residual stress field and strain hardening resulting from shot peening.

However, current life assessment models are relatively conservative, merely considering the shot peening as an additional safety factor rather than taking account of the benefits derived from the process. The objective of this research is to develop a life assessment method considering the effects of shot peening in the component lifing protocols. This work includes modelling of residual stress relaxation behaviour and how a fatigue crack grows in the predicted residual stress field and strain hardened layers. Successful development of this approach will achieve a more cost effective scheduling of repair or replacement of the assets while ensuring sufficient safety margins.

Research group

Engineering Materials

Research project(s)

Life assessment methods for industrial steam and gas turbines

Mr Chao You
Engineering, University of Southampton, Highfield, Southampton. SO17 1BJ United Kingdom
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