Professor David Nash

Mechanical and Aerospace Engineering

Expertise

Has expertise in:

    • Finite element analysis
    • Mechanical structural design
    • Pressure Vessels and piping systems
    • Bio-mechanics
    • CPD
    • Stress analysis in all its forms - ANSYS and ABAQUS
    • Design and optimisation of engineering structures
    • Use of codes and standards and design by analysis
    • Design of medical devices

Publications

Web crippling behaviour of cold-formed steel channel sections with web holes subjected to interior-one-flange loading condition - part II : parametric study and proposed design equations
Lian Ying, Uzzaman Asraf, Lim James B.P., Abdelal Gasser, Nash David, Young Ben
Thin-Walled Structures Vol 114, pp. 92–106, (2017)
http://dx.doi.org/10.1016/j.tws.2016.10.018
Effects of edge-stiffened circular holes on the web crippling strength of cold-formed steel channel sections under one-flange loading conditions
Uzzaman Asraf, Lim James B.P., Nash David, Young Ben
Engineering Structures Vol 139, pp. 96–107, (2017)
http://dx.doi.org/10.1016/j.engstruct.2017.02.042
Web crippling behaviour of cold-formed steel channel sections with web holes subjected to Interior-one-flange loading condition-part I : experimental and numerical investigation
Lian Ying, Uzzaman Asraf, Lim James B.P., Abdelal Gasser, Nash David, Young Ben
Thin-Walled Structures Vol 111, pp. 103–112, (2017)
http://dx.doi.org/10.1016/j.tws.2016.10.024
Effect of web holes on web crippling strength of cold-formed steel channel sections under end-one-flange loading condition - Part II: Parametric study and proposed design equations
Lian Ying, Uzzaman Asraf, Lim James B.P., Abdelal Gasser, Nash David, Young Ben
Thin-Walled Structures Vol 107, pp. 489-501, (2016)
http://dx.doi.org/10.1016/j.tws.2016.06.026
Effect of web holes on web crippling strength of cold-formed steel channel sections under end-one-flange loading condition - Part I: Tests and finite element analysis
Lian Ying, Uzzaman Md Asraf, Lim James B.P., Abdelal Gasser, Nash David, Young Ben
Thin-Walled Structures Vol 107, pp. 443-452, (2016)
http://dx.doi.org/10.1016/j.tws.2016.06.025
Design of top-hat purlins for cold-formed steel portal frames
Uzzaman Asraf, Wrzesien Andrzej M., Lim James B.P., Hamilton Robert, Nash David
Structures Vol 7, pp. 113-125, (2016)
http://dx.doi.org/10.1016/j.istruc.2016.06.006

more publications

Research interests

Applications of finite element analysis:

  • specifically pressure vessels and piping,
  • bio-mechanics,
  • materials

Projects

Influence of Structure on Wind Turbine Blade Erosion
Nash, David (Principal Investigator)
Period 03-Oct-2016 - 30-Sep-2019
Project 3.7: Investigation and model development of valve leak tightness
Anwar, Ali (Post Grad Student) Gorash, Yevgen (Research Co-investigator) Dempster, William (Principal Investigator) Hamilton, Robert (Academic) Nash, David (Academic)
Pressure Relief Valves (PRV) tend to leak at high pressures. Customers demand a guarantee of leak tightness as a percentage of the set pressure. WEIR competitors can guarantee a higher leak tightness and therefore in certain circumstance we lose orders to our competitors. This work program is intended to understand why PRV's leak and how to reduce or mitigate against the leakage. Improving WEIR design will support the sale of more product. The main purpose of this research is to deliver prediction methods for sealing design with specific emphasis on Weir Group Sarasin-RSBD valve products. The main objective of this problem is to be able to re-create this leakage issue using computational tools. This will be done using a combination of Finite Element Analysis (FEA) and Computational Fluid Dynamics (CFD). The complexities of this research lie with the deformation and surface effects of the "sealing faces" of the valves at a micron and macro scale including load cycling and creep behaviour analysis. This has to be analysed and reproduced at corresponding pressures and temperatures with compressible or incompressible fluid flow using combined FEA and CFD tools.
Period 24-Jun-2014 - 24-Jun-2017
Doctoral Training Grant 2006 | Pugh, Alistair William
Hamilton, Robert (Principal Investigator) Nash, David (Co-investigator) Pugh, Alistair William (Research Co-investigator)
Period 01-Sep-2007 - 06-Jun-2012
Doctoral Training Grant | Beveridge, Andrew James
Wheel, Marcus (Principal Investigator) Nash, David (Co-investigator)
Period 01-Jul-2007 - 12-May-2011
Doctoral training centre in wind energy systems | Siddons, Craig
Stack, Margaret (Principal Investigator) Nash, David (Co-investigator) Siddons, Craig (Research Co-investigator)
Period 01-Oct-2013 - 01-Oct-2016
Doctoral training centre in wind energy systems | Macdonald, Hamish
Stack, Margaret (Principal Investigator) Nash, David (Co-investigator) Macdonald, Hamish (Research Co-investigator)
Period 01-Oct-2012 - 01-Oct-2016

more projects

Address

Mechanical and Aerospace Engineering
James Weir Building

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