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The University of Southampton
EngineeringPostgraduate study

Mr Somsubhro Chaudhuri B.E., MSc

Postgraduate research student

Mr Somsubhro Chaudhuri's photo

Mr Somsubhro Chaudhuri MSc Mechanical Engineering, Engineering Materials PhD Student.


I received my MSc in Mechanical Engineering from the University of Southampton in 2015 after completing a B.E. in Aeronautical Engineering from Aeronautical Society of India in 2013 and an Aircraft Maintenance Engineering Diploma from SAST, Delhi Flying Club in 2010.

During my MSc I chose modules which gave me a strong background in Engineering Materials. My MSc dissertation was based on short fatigue crack growth in Ni-based superalloys under the supervision of Professor Philippa Reed and with the help of Dr Rong Jiang.

Upon graduating I registered as a PhD student in the Engineering Materials Research Group under the supervision of Professor Philippa Reed and Dr Brian Mellor, working on fatigue initiation and growth in steel arc welds.



Research interests

  • Welding Processes
  • Welded Structures
  • Fatigue
  • Microstructure Characterisation
  • X-ray Computer Tomography

PhD supervision: Professor Philippa Reed, Dr Brian Mellor

PhD research: Data rich experimental assessment of weld fatigue initiation

Research projects

Fatigue of welds is a complex regime of metal fatigue as welding processes strongly influence the local microstructure of the material by the heating, subsequent cooling and the fusion with filler material. This causes the welds to be more susceptible to fatigue failure than the base metal and varying approaches have been taken to take this into account.

The primary aim of this PhD project is to further assess the lower fatigue strength of welds as compared to the parent or base metal by using new data rich techniques to quantify critical weld toe geometries and subsequent fatigue damage in 3D. The conventional metallographic and analysing techniques used until now have been relatively limited in terms of analysing and resolving the weld toe geometry and associated features. Although approaches in weld fatigue analysis have been suggested that allow for weld toe shape, they have been based on averaged geometry values. This project aims to use a variety of techniques for mapping of weld features in detail at representative length scales to understand the respective effects on fatigue initiation and growth. Serial sectioning approaches and newly available data rich X-ray CT evaluations will be compared for determining critical weld toe geometry and associated stress concentrations. The data derived from fatigue experiments and subsequent analysis will be then used to create a numerical model of the fatigue behaviour of the welded structures which can then be linked to design rules for light-weighting of such structures in a safe and efficient manner.

Early crack initiation processes in steel arc welds web page




Research group

Engineering Materials

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Mr Somsubhro Chaudhuri
Engineering, University of Southampton, Highfield, Southampton. SO17 1BJ United Kingdom

Room Number: 5/3021

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