During my career, three theses and more than 55 research papers & reports have been written and published. They are listed bellow by various areas of research interests.

1. Nguyen, The Ninh, "A study of aluminum-thermic welding of steel bars for reinforced concrete", B.E Thesis, Slovak Technical University, 1984.

2. Nguyen The Ninh, "A model to predict soil compaction caused by tractor wheel in clay soil", M.Eng. Thesis, Asian Institute of Technology, Bangkok, Thailand, 1991.

3. Ninh T. Nguyen, "Advanced Modelling of the Fatigue of Butt-Welded Structures", PhD. Thesis, 297 pages, University of Adelaide, Australia, 1996.

(i) Fracture Mechanics and Fatigue of Welded Joints

1. Nguyen, Ninh T. and Wahab, M. A., "A mathematical model to predict fatigue notch factor of butt joints", Structural Engineering and Mechanics, an International journal, Vol. 6, No. 4, (1998), pp. 467-471.

2. Nguyen, Ninh T. and Wahab, M. A., "The effect of weld geometry and residual stresses on the fatigue of welded joints under combined loading", special issue of the Journal of Materials Processing Technology, Vol. 77 No. 1, pp. 201-208, May 1998. This paper presented at the Intl. Conf. on "Advances in Materials and Processing Technologies (AMPT’95)", Dublin City University, August 8-12,1995.

3. Nguyen, Ninh T. and Wahab, M. A., "The effect of Undercut, Misalignment and Residual Stresses on the Fatigue of Butt Welded Joints", Fatigue & Fracture of Engineering Materials and Structures, an International Journal, Vol. 19, No. 6, (1996), pp. 769-778.

4. Nguyen, Ninh T. and Wahab, M. A., "The effect of residual stresses on fatigue of butt joints", Research Supplement in Welding Journal, American Welding Society, Vol. 75 No. 2, (1996) pp. s55 - s61.

5. Nguyen, Ninh T. and Wahab, M. A., "The Effect of Undercut and Residual Stresses on Fatigue Behaviour of Misaligned Butt Joints", Engineering Fracture Mechanics, an International Journal, 1996, Vol. 55, No. 3, pp. 453-469.

6. Nguyen, Ninh T. and Wahab, M. A.," A Theoretical Study of the Effect of Weld Geometry Parameters on Fatigue Crack Propagation Life", Engineering Fracture Mechanics, an International Journal, Vol. 51, No.1, May 1995, pp. 1-18.

7. Nguyen, Ninh T. and Wahab, M. A., "The effect of residual stresses and weld geometry on the improvement of fatigue life ", special issue of the Journal of Materials Processing Technology, Elsevier Science Publishers, Vol 48 (1995), pp. 581-588. Paper was selected from Proceeding of the Second Asia Pacific Conference on Material Processing, Singapore, November 16-18, 1994.

8. Wahab M.A, N. T. Nguyen and M.Demir, "The effect of undercut, misalignment, residual stresses and corrosion on the fatigue behaviour of butt-welded structures", Proceeding of "Advances in Materials and Processing Technologies (AMPT’97)", July 22-26, Guimareis, Portugal, 1997, Vol. II, pp.680-688. Paper is also selected for publication in Special Issue of Journal of Materials Processing Technology.

9. Ngo Le Thong and Nguyen The Ninh, "Linear Elastic Fracture Mechanics (LEFM), a Useful Tool for Modelling of Fatigue Behaviour of Welded Joints and Structures", Journal of Science and Technology, Vietnamese Science and Engineering Publisher, Vol. 37, No. 4, 1999, pp. 34-41

10. Nguyen, Ninh T., Ohta A., Matsuoka K., Sukuki N. and Maeda Y.,. "Analytical Solutions for Transient Temperature of Semi-Infinite Body Subjected to 3D Moving Heat Sources", Weld. Res. Supp., Welding Journal, American Welding Society, August, 1999, pp. 265s-274s. Download this paper in PDF format

11. Ninh T. Nguyen, D.J. Oehlers, “ The Interaction between residual strength and fatigue S-N curves”, paper submitted to the Mechanics of Structures and Machines, an Inter. Journal, 1999, paper is under review.

12. Ohta A., Maeda Y., Nguyen, Ninh T. and Sukuki N., "Fatigue Strength Improvement of Box Section Beam by Low Transformation Temperature Welding Wire", IIW Doc. XIII-1759-99. Paper is in press.

13. Ohta A., Maeda Y., Nguyen, Ninh T. and Sukuki N., “Fatigue Strength improvement of Box Section Member by Using Low Transformation Temperature Welding Material”, Quarterly Journal of the Japanese Welding Society, November issue, 2000, pp.628-633 (in Japanese).

14. Ohta A., Maeda Y., Nguyen, Ninh T., Sukuki N. and C.Siga,, “Fatigue Strength Improvement of Welded Joints by Low Transformation Temperature Welding Material”, Transaction of the Society of Naval Architects of Japan, November, 2000, pp. 609-616 (in Japanese).

15. Ninh T. Nguyen, Yiu-Wing Mai, Steve Simpson and A. Ohta, “Analytical Solutions for Double-Ellipsoidal Heat Sources in Finite Thick Plate”, paper submitted to Welding Journal for publication in Welding Research Supplement.

(ii) Composite Steel & Concrete Plated Beams and Soil Mechanics

16. Ninh T. Nguyen, D.J. Oehlers and M.A. Bradford, "Models for the Flexural Peeling of Angle Plates Adhesively Bonded to R-C Beams", Advances in Structural Engineering, an International Journal, Vol. 1 No. 4., 1998, pp. 285-298.

17. Oehlers D.J, Ninh T. Nguyen, M. Ahmed and Bradford M.A.,"Transverse and Longitudinal Partial Interaction in Composite Bolted Side-plated Reinforced Concrete Beams", Structural Engineering and Mechanics, an International Journal, Vol. 5, No.5, (1997), pp. 553-563.

18. Oehlers D.J, Ninh T. Nguyen, M. Ahmed and Bradford M.A., "Partial Interaction in Composite Steel and Concrete Beams with Full Shear Connection", Journal of Constructional Steel Research, Vol. 41, No. 2/3, pp. 235-248, 1997.

19. Ninh T. Nguyen, D.J. Oehlers and M.A. Bradford, "Bolted Composite Side Plated RC Beams with Transverse and Longitudinal Partial Interaction", paper submitted to Structural Engineering and Mechanics, an International Journal, 1998, paper in press.

20. Ninh T. Nguyen, D.J. Oehlers and M.A. Bradford, "A rational model for the degree of interaction in composite beams with flexible shear connectors", Journal of Mechanics of Structures and Machines, Vol. 26, No. 2, 1998, pp. 175-194.

21. Oehlers D.J, Ninh T. Nguyen and Bradford M.A., "Upgrading R.C. Beams by gluing steel plates to their sides, Part 1: Flexural Peeling", paper is submitted to Structural Engineering and Mechanics, an International Journal, 1998, paper is in press.

22. Oehlers D.J, Ninh T. Nguyen and Bradford M.A., "Upgrading R.C. Beams by Gluing Steel Plates to Their Sides, Part 2: Shear Peeling and Application", paper submitted to Structural Engineering and Mechanics, an International Journal, 1998, paper is in press.

23. Oehlers D.J, Marfique Ahmed, Ninh T. Nguyen and Bradford M.A., "Bolting steel plates to the sides of RC-beams, Part 2: Transverse interaction and rigid plastic design", paper submitted to Journal of Structural Engineering, ASCE, 1998, paper is under review.

24. Salokhe, V. M. and Nguyen The Ninh, "Modelling soil compaction under pneumatic tyres in clay soil.", Journal of Terramechanics, The International Society for Terrain-Vehicle Systems, Pergamon Press, Vol. 20, No. 2, March 1993, pp. 63-75.

1. Nguyen, Ninh T. and Wahab, M. A., "An Analytical 4-Parameter Model to Predict Fatigue Strength and Fatigue Notch Factor of Butt Welded Joint", Proc. of 13th Australasian Conf. on the Mechanics of Structures and Materials (ACMSM 13), Uni. of Wollongong, 5-7 July, 1993, pp. 627-634.

2. Nguyen, Ninh T. and Wahab, M. A., "The Effect of Butt Weld Geometry Parameters on Stress Intensity Factor and Fatigue Life", Proc. of the Second Asia-Pacific Conference in Computational Mechanics, Sydney, August 1-3, 1993, pp. 883-888.

3. Nguyen, Ninh T. and Wahab, M. A., "Theoretical Analysis of The Effect of Residual Stresses in Welded Structures on The Improvement of Fatigue Strength", Proc. of 5th Australian Aeronautical Conference on "Fracture and Fatigue Life Enhancement", Melbourne, September 13-15, 1993, pp. 463-469.

4. Nguyen, Ninh T. and Wahab, M. A., "The Combined Effect of Weld Geometry Parameters on Fatigue Strength and Fatigue Notch Factor of Butt Welded Joint", Proc. of WTIA/AINDT Conference on " 1993 Fabcon/Fabfair", University of Wollongong, 27th Sept.- 1st Oct. 1993, pp. 74-79.

5. Wahab, M. A. and Nguyen, Ninh T., "Effect of Residual Stresses Produced by Mechanical Means on the Fatigue Life of Welded Structures", Proc. of 2nd Inter. Conf. on Surface Engineering: Coatings and Surface Treatments in Manufacturing, March 7-10, 1994, pp. 308-318.

6. Nguyen, Ninh T. and Wahab, M. A., "A mathematical model to predict geometry magnification factor for stress intensity factor of butt welded joints", Proc. of the American Welding Society Conference on "Advanced Joining Technologies for New Materials", Cocoa Beach, Florida, March 2-4,1994, pp. 142-154.

7. Nguyen, Ninh T., Wahab, M. A and D. J. Oehlers, "An advanced study of the geometrical parameters and residual stresses on fatigue strength of welded joints", paper 29, Proc. of 42nd National Welding Conference, Melbourne 24-27 October, 1994, Australia.

8. Nguyen, Ninh T. and Wahab, M. A., "The Effect of Weld Geometry and Residual Stresses on Fatigue of Welded Joints under Combined Loading", Proc. of Inter. Conf. on "Advances in Materials and Processing Technologies (AMPT’95)", Dublin City University, August 8-12,1995, Vol. 1, pp. 292-302.

9. Nguyen, Ninh T., Wahab, M. A. and Yellup, J., "The effect of Undercut and Misalignment on Fatigue of Butt Joints", Proceeding of the 14th Australasian Conf. on the Mechanics of Structures and Materials (14ACMSM), Hobart 11-13 December, 1995, Vol. 1, pp. 254-259.

10. Wahab M.A, N. T. Nguyen and M.Demir, "The effect of undercut, misalignment, residual stresses and corrosion on the fatigue behaviour of butt-welded structures", Proceeding of "Advances in Materials and Processing Technologies (AMPT’97)", July 22-26, Guimareis, Portugal, 1997, Vol. II, pp.680-688. Paper is also selected for publication in Special Issue of Journal of Materials Processing Technology.

11. Wahab M.A, N. T. Nguyen and M.Demir, "Effects of geometrical parameters, corrosion and residual stresses on the fatigue behaviour of welded structures", Proceeding of "15th Australasian Conf. on the Mechanics of Structures and Materials (15ACMSM), December 8-10, Melbourne, Australia, 1997, pp. 589-595.

12. Nguyen, Ninh T., Ohta A., Matsuoka K., Sukuki N. and Maeda Y., "Transient Temperature of Bead-on-Plate Predicted by Double-Ellipsoidal Power Density Moving Heat Source", paper No. 107, Proc. Of the National Meeting of Japanese Welding Society No. 64, 21-23 April, 1999, pp. 16-17.

13. Nguyen, Ninh T., Ohta A., Matsuoka K., Sukuki N. and Maeda Y., "Analytical Solution for Transient Temperature of Double-Ellipsoidal Heat Source and Its Use for Evaluation of Residual Stresses in Bead-on-Plate", Proc. of Inter. Workshop on Fracture Mechnics and Advanced Engineering Materials, Sydney, 8-10 December 1999, Australia.

14. Nguyen, Ninh T., Ohta A., Matsuoka K., Sukuki N. and Maeda Y., “Analytical Solution of Double-Ellipsoidal Moving Heat Source and Its Use for Evaluation of Residual Stress in Bead-on-Plate”, Proceeding of International Workshop on Advanced Engineering Materials and Fracture Mechanics in Sydney, 8-10 December 1999, Australia, pp. 143-149.

15. Nguyen, Ninh T., “Analytical Solution for Semi-Infinite Body Subjected to 3D Moving Heat Source and Its Application in Weld Pool Simulation”, Proc. of IMPLAST'2000, the 7th International Symposium on Structural Failure and Plasticity, 4-6 October 2000, Melbourne, Australia, Editors: X. L. Zhao & G. H. Grzebieta, pp. 819-826.

16. Nguyen, Ninh T., Yiu-Wing Mai and Ohta A., “Analytical solution for a new hybrid double-ellipsoidal Heat Source in semi-infinite body”, Proc. of Int. Conf. on Advances in Composite Materials & Structures VII, CADCOMP’2000, Sept. 13-15, Bologna, Italy, Editors: W.P. de Wilde, W.R. Blain and C.A. Brebbia, pp. 207-217.

17. Nguyen, Ninh T., Yiu-Wing Mai and Ohta A., “Analytical Solution for New Hybrid Double-Ellipsoidal Heat Source in Semi-Infinite Body and Its Application in Weld Pool Simulation”, Proc. of WTIA’48 Annual Conference, Melbourne, Oct. 30 – Nov. 3, 2000, paper 92.

18. Oehlers D.J, Ninh T. Nguyen and Bradford M.A., "Partial Interaction in Composite Beams with Mechanical Shear Connectors", Proc. of Third Asian-Pacific Conference on Computational Mechanics, APCOM’96, 16-18 Sept. 1996, Soul, South Korea, Vol. 2, pp. 1245-50.

19. Oehlers D.J, Ninh T. Nguyen and Bradford M.A., "Debonding of Steel Plates Glued to the Sides of Reinforced Concrete Beams", Proceeding of Fifth International Conference on Structural Failures, Durability and Retrofitting, 27-28 November, ICSF’97, Singapore, 1997, ISBN 981-00-9414-0, pp. 316-323.

20. M. Ahmed, Oehlers D.J, Ninh T. Nguyen and Bradford M.A., "Reinforced concrete beams with side plates bonded to their sides", Proceeding of Fifth International Conference on Structural Failures, Durability and Retrofitting, 27-28 November, ICSF’97, Singapore, 1997, ISBN 981-00-9414-0, pp. 362-369.

21. Salokhe, V. M. and Nguyen The Ninh, "A dimensional analysis of soil compaction under pneumatic tyres in clay soil.", Proc. of Inter. Agricultural Engineering Conf., Bangkok, Thailand, 7-10 December, 1992, pp. 295-302.

1. Nguyen, Ninh T., "The Combined Effect of Influential Parameters on Fatigue Strength of Butt Welded Steel Structures", Progress Report for Transferring from Master of Eng.Sc. to Ph.D, Mech/1993/TRDOC#9 / MES:Ph.D / October 1993, Dept. of Mech. Engineering, The University of Adelaide.

2. N. T. Nguyen and D. J. Oehlers, "A mathematical model for flexural peeling of side-plated glued beams", Research Report, R143, ISBN No. 0-86396-437-0, Department of Civil & Environmental Engineering, The University of Adelaide, Feb. 1997, ISBN 0 86396 437 0.

3. N. T. Nguyen and D. J. Oehlers, "Simply supported Side-plated Beams with Transverse and Longitudinal Partial Interaction", Research Report, R144, Department of Civil & Environmental Engineering, The University of Adelaide, Feb. 1997, ISBN No. 0-86396-438-9.

4. N. T. Nguyen and D. J. Oehlers, "The Experimental Investigation of Flexural Peeling in Side-Plated Glued Beams", Research Report, R141, Department of Civil & Environmental Engineering, The University of Adelaide, Feb. 1997, ISBN No. 0-86396-582-0.

5. Ninh T. Nguyen and Oehlers D.J., "Partial Interaction in Composite Steel-Concrete Beams with Mechanical Shear Connectors", Dept. of Civil and Environmental Engineering Report, The University of Adelaide, Research Report # R 153, June 1997, ISBN 0 86396 583 0.

6. N. T. Nguyen and D. J. Oehlers, "Experimental Investigation of Side-Plated Beams Subjected to Both Flexural Peeling and Shear Peeling", Research Report, R142, Department of Civil & Environmental Engineering, The University of Adelaide, April 1997, ISBN No. 0-86396-444-3.

7. N. T. Nguyen and D. J. Oehlers, "Experimental Investigation of Pure Flexural and Pure Shear Peeling of Angle Glued to the Sides of Tension Faces of RC Beams", Research Report, R151, Department of Civil & Environmental Engineering, The University of Adelaide, April 1997, ISBN No. 0-86396-580-6.

8. N. T. Nguyen and D. J. Oehlers, "Interaction curves for Flexural and Shear Peeling of Side-Plated Glued Beams", Research Report, R152, Department of Civil & Environmental Engineering, The University of Adelaide, April 1997, ISBN No. 0-86396-581-4.

9. N. T. Nguyen and D. J. Oehlers, "A Mathematical Model for Flexural Peeling of Angle Plates Glued to RC-Beams", Research Report, R155, Department of Civil & Environmental Engineering, The University of Adelaide, August 1997, ISBN No. 0-86396-590-3.

10. N. T. Nguyen and D. J. Oehlers, "Composite Side Plated Beams with Transverse and Longitudinal Partial Interaction", Research Report, R156, Department of Civil & Environmental Engineering, The University of Adelaide, August 1997, ISBN No. 0-86396-591-1.