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PhD Research Project

IDTC/EngD-5 Ship structural integrity - Lloyd's Register


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Institution Location



Related PhDs


University College London
Department of Mechanical Engineering
University of Southampton
School of Engineering Sciences
National Structural Integrity Research Centre
Engineering

Engineering & The Environment
Prof J Barton
Prof I. Sinclair
Applications accepted all year round

Ships are growing bigger in size. Operational demands impose high levels of structural loadings. Operational economics dictate that the payload to structural weight ratio should be high leading to requirements of weight minimisation. Thus this coupled action of higher loads and lighter, thinner structures leads to structures being subjected to higher stresses for larger portions of their operational lives. This has implications on the initiation of defects such as cracks in ship structures and their subsequent propagation. Ship owners and ship safety regulators have an obligation to examine ships for cracks and prescribe remedial action. The current philosophy is to accept no defects or cracks; that is, if a ship surveyor detects a crack then the instruction is to repair and rectify that defect regardless of its location and significance (potentially consuming resources and energy unnecessarily). There is a need to examine this philosophy in a fundamental manner and create a safe-ship approach based on rational examination of defects and their implications on ship structural integrity.

This project focuses on the role of fracture mechanics to underpin assessment of ship structural integrity. Numerical (FEA, BEA, meshless) methods will be developed and applied to assess critical strain energy release rates for stiffened plate structures with possible multiple cracks, perhaps using non-linear J-integral or equivalent approaches to account for plasticity. It is envisaged that parallel experimental modelling aided full field strain and stress measurements from different TSA, DIC and other techniques will help in both validating the numerical models as well as providing physical understanding of the fracture toughness characteristics of plated structures.

This project will be aligned with that sponsored by TWI.

To be eligible students need to have UK status or be a European Union (EU)* national who has been 'ordinarily resident' in the UK for three years prior to the commencement of studies.

Limited relaxation of student eligibility requirements:

Outstanding international applicants, currently based in the UK and able to attend an interview at Southampton University, who have the equivalent of a very good first class UK degree (typically with 75% or above overall) may be eligible to compete for the international doctoral scholarship (IDS) on the EngD scheme. If you wish to apply for the IDS, please indicate this on your application form and ensure a personal statement, full degree transcripts and two references are included on applying.

If you wish to discuss any details of the project informally, please contact Professor Janice Barton, Email: j.m.barton@soton.ac.uk.




Enquiries: engd@soton.ac.uk


Funding Notes:

This EngD project will be funded through the Industry Doctoral Training Centre (IDTC) http://www.southampton.ac.uk/idtc. The studentship comprises support from both EPRSC http://www.epsrc.ac.uk and an industrial sponsor.






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