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Prof. Sean B. Leen

Professor of Mechanical Engineering  Head of Mechanical and Biomedical Engineering phone:    353 91 495955  fax:        353 91 563991 e-mail:    sean.leennuigalway.ie Research Interests computational solid mechanics structural integrity fatigue fretting and wear plasticity, creep and superplasticity modelling of manufacturing processes

Some recent and current projects:

• Finite element modelling of fretting wear and fretting fatigue of aeroengine materials
• Simplified methods for elastic-plastic and creep analyses of aeroengine casings
• Thermo-mechanical life prediction of superplastic forming tools
• Multiaxial representative test specimen for fretting fatigue in splined couplings
• Failure and damage prediction for superplastic forming of titanium alloys
• Anisotropic creep damage in high-temperature welded power plant materials and components
• Modelling of fracture of HVOF sprayed coatings
• Creep-fatigue failure and damage behaviour of 9Cr steels for power generation plant
• Creep-fatigue crack growth of gas turbine aeroengine disk material
• Process modelling of welding (TiG and inertia friction)

Selected Publications

(For a full list, click here)

Ding, J., Bandak, G, Leen, SB, Williams, EJ, Shipway, PH, “Experimental characterisation and numerical simulation of contact evolution during fretting for TI-6Al-4V, “35th Leeds-Lyon Symp on Tribology, University of Leeds, UK, 9th-12th Sept, 2008.

Houghton, D, Wavish, P.M., Williams, EJ, Leen, SB, “Multiaxial fretting fatigue testing and prediction for splined couplings,” Int J Fatigue (2009), doi:10/1016/j/jijfatigue.2008.12.005.

Ding, J, Leen, SB, Williams, EJ, Shipway, PH, “An asperity-contact based oxidation model for fretting wear with the presence of debris,” 5th China International Symp on Tribology and 1st Int Tribology Symp of IFToMM, Bejing, China, Sept 24 – Sept 27, 2008.

Hyde, TR, Leen, SB, McColl, IR, “A methodology for modelling the effects of nitriding on fatigue life”, Proc Instn Mech. Engrs, Part L: J. Materials Design & Applications, Vol 222, No L1, pp 1-14, 2008.

S Peravali, T H Hyde, K A Cliffe and S B Leen. “Development and use of an anisotropic damage model for the high-temperature life assessment of a P91 weldment.” J. Strain Analysis, 2008, 43(5), 361-382. [DOI: 10.1243/03093247JSA347]

Ding, J, Leen, SB, Williams, EJ, Shipway, PH, “Finite element simulation of fretting wear-fatigue interaction in spline couplings,” Tribology, vol 2, no 1, pp 10-24, 2008 [doi:10/1179/175158308X320791]

Madge, JJ, Leen, SB, Shipway, PH, “A combined wear and crack nucleation-propagation methodology for fretting fatigue life prediction,” Int. J. Fatigue. 30, 2008, pp 1509-1528.

Krohn, M.A., Leen, S.B., Hyde, T.H., “A superplastic forming limit diagram concept for Ti-6Al-4V,” Proc Instn Mech. Engrs, Part L: J. Materials Design & Applications, Vol 221, No L4, pp 251-264, 2007.

Bansal, P, Shipway, P, Leen, SB, “Residual stresses in HVOF sprayed coatings – modelling the effect of spray parameters” Acta Materialia, 2007, 55, pp 5089-5101.

Sabesan, R, Leen, SB, Hyde, TH, “Application of notch strain techniques to elastic-plastic and elastic-plastic-creep behaviour of complex structures, “Proc IMechE, Part G: J. Aerospace Engineering, 2007, 221, pp. 235-252.

Ding, J, McColl, IR, Leen, SB, “A finite element based approach to simulating the effects of debris on fretting wear,” Wear, 2007, 263, pp 481-491.

Madge, J.J., McColl, I.R., Leen, S.B., “Contact-evolution based prediction of fretting fatigue life: effect of slip amplitude,” Wear, 262, 2007, 1159-1170.

Ding, J, Sum, W, Rajaratnam, S, Leen, SB, McColl, IR, Williams, EJ, “Fretting fatigue predictions in a complex coupling,” Int. J. Fatigue. 29, 2007, pp 1229-1244.

Shang, J., Hyde, T.H., Leen, S.B., “Finite element based life prediction for high temperature cyclic loading of a large superplastic forming die,” J Strain Analysis, vol 41, no 8, 2006, pp 539-559.

Ding, J, McColl, I.R., Leen, S.B., “The application of fretting wear modelling to a spline coupling,” Wear, 262, 2007, 1205-1216.

Bansal, P, Shipway, P, Leen, SB, “Effect of particle impact on residual stress development in HVOF sprayed coatings” J Thermal Spray Technology, 15(4), Dec 2006, 570-575.

Bansal, P, Shipway, P, Leen, SB, Driver, LC, “Experimental validation of FE predicted fracture behaviour of thermally sprayed coatings” Mat Sci Eng A, 430, 2006, 104-112.

Bansal, P, Shipway, PH, Leen, SB, “Finite element modelling of the fracture behaviour of brittle coatings,” Surface & Coatings Technology, 200, pp 5318-5327, 2006.

Pan, W, Leen, SB, Hyde, TH, “Investigation of an iterative sub-structure method for elastic and elastic-plastic framework analysis,” Computers & Structures , vol 84, pp 690-698, 2006.

Hyde, TH, Jones, IA, Peravali, S, Sun, W, Wang, JG, Leen, SB, “Anisotropic creep behaviour of Bridgman notch specimens,” Proc Instn Mech. Engrs, Part L: J. Materials Design & Applications, Vol 219, No L3, pp 163-175, 2005.

Hyde, TR, Leen, SB, McColl, IR, “A simplified fretting test methodology for complex shaft couplings,” Fat Fract Eng Mats Structs, 28, 1047-1067, 2005.

Pan, W, Krohn, M., Leen, SB, Hyde, TH, Walloe, S, “A sigmoidal model for superplastic deformation,” Proc Instn Mech. Engrs, Part L: J. Materials Design & Applications, vol 219, no L3, pp 149-162, 2005.

Hyde, TH, Sabesan, R, Leen, SB, “Approximate prediction methods for multiaxial notch stresses and strains under elastic-plastic and creep conditions,” J Strain Analysis, vol 40, no 6, pp 535-548, 2005.

Sum,WS, Williams, EJ, Leen, SB, “Finite element, critical-plane fatigue life prediction of simple and complex contact configurations,” Int. J. Fatigue. 27, 2005, pp 403-416.

McColl, I.R., Ding, K., Leen, S.B., “Finite element simulation and experimental validation of fretting wear,” Wear, 256(11-12), 1114-1127, 2004.

Ding, K., Leen, S.B. and McColl, I.R., “The effect of slip regime on fretting wear-induced stress evolution,” Int. J. Fatigue. 26, 2004, pp 521-531.

    

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