**49. Nikas, G. K.**** Parametric
and optimisation study of rectangular-rounded, hydraulic,
elastomeric, reciprocating seals at temperatures between ****–54
and +135 °C****.
Lubricants, 2018, 6(3), article 77.
**

**48. Nikas, G. K. Fast
performance-analysis of rectangular-rounded hydraulic
reciprocating seals: mathematical model and experimental
validation at temperatures betwee****n –54
and +135 °C****.
Tribology International, 2018, 128, 34-51.**

**47. Nikas, G. K. Friction
and wear of seals. ASM Handbook Vol. 18 -
Friction, Lubrication, and Wear Technology (Ed.: G. Totten), 2017, pp.
957-968.**

**46. Nikas, G. K. Miscalculation of film thickness, friction
and contact efficiency by ignoring tangential tractions in
elastohydrodynamic contacts. Tribology
International, 2017, 110, 252-263.**

**45. Nikas, G. K. Particle extrusion in elastohydrodynamic line contacts:
dynamic forces and energy consumption.
Proceedings of the Institution of Mechanical Engineers, Part J:
Journal of Engineering Tribology, 2017, 231(10), 1320-1340.**

**44. Nikas,
G. K. Algebraic equations
for the pile-up geometry in debris particle indentation of rolling
elastohydrodynamic contacts. ASME Journal of Tribology,
2016, **138(2), 021503-021503-14.

**43. Nikas,
G. K. Modeling dark and
white layer formation on elastohydrodynamically lubricated steel
surfaces by thermomechanical indentation or abrasion by metallic
particles. ASME Journal of Tribology, 2015, 137(3),
031504-031504-20.**

**42. Nikas, G. K., Almond, R. V., and Burridge G.
Experimental
study of leakage and friction of rectangular, elastomeric,
hydraulic seals for reciprocating motion from –54
to +135 °C and pressures from 3.4 to 34.5 MPa. Tribology
Transactions, 2014, 57(5), 846-865.**

**41. Nikas, G. K. Strain-rate
effects
on the plastic indentation and abrasion of elastohydrodynamic
contacts by debris particles. Proceedings of the
Institution of Mechanical Engineers, Part J: Journal of Engineering
Tribology, 2014, 228(1), 22-45.**

**40. Nikas, G. K. Debris
particle
indentation and abrasion of machine-element contacts: an
experimentally validated, thermoelastoplastic numerical model with
micro-hardness and frictional heating effects.
Proceedings of the Institution of Mechanical Engineers, Part J:
Journal of Engineering Tribology, 2013, 227(6), 579-617.**

**39. Nikas, G. K. An
experimentally validated numerical model of indentation and
abrasion by debris particles in machine-element contacts
considering micro-hardness effects. Proceedings of the
Institution of Mechanical Engineers, Part J: Journal of Engineering
Tribology, 2012, 226(5), 406-438.**

**38. Nikas, G. K.
(Editor) Recent Developments in Wear Prevention, Friction
and Lubrication. Kerala, India: Research Signpost,
2010.**

**37. Nikas, G. K. A state-of-the-art review on the effects of
particulate contamination and related topics in machine-element
contacts. Proceedings of the Institution of Mechanical
Engineers, Part J: Journal of Engineering Tribology, 2010, 224(5),
453-479.**

**36. Nikas, G. K.
Eighty years of research on hydraulic
reciprocating seals: review of tribological studies and
related topics since the 1930s.
Proceedings of the Institution of Mechanical Engineers, Part J:
Journal of Engineering Tribology, 2010, 224(1), 1-23.**

**35. Nikas, G. K. Review of studies on the detrimental effects of
solid contaminants in lubricated machine element contacts. First chapter (pp. 1-44) in the book
entitled "Reliability Engineering Advances" (Editor: G. I.
Hayworth). New York, USA: Nova Science Publishers, 2009.**

34. Reddyhoff, T., Underwood, R.
J., Nikas, G. K., Sayles, R. S., and Spikes, H. A. Thermal
aspects of debris in EHL contacts.
Proceedings of the Fourth World Tribology Congress, 6-11 September
2009, Kyoto,

**33. Nikas, G. K., and
Sayles, R. S. Surface coatings
and finite-element analysis of layered fretting contacts.
Proceedings of the Institution of Mechanical Engineers, Part J:
Journal of Engineering Tribology, 2009, 223(2), 159-181.**

**32. Nikas, G. K. Research
on the tribology of hydraulic reciprocating seals. First chapter (pp. 11-56) in the book
entitled "Tribology Research Trends" (Editor: T. Hasegawa). New
York, USA: Nova Science Publishers, 2008.**

**31. Nikas, G. K., and
Sayles, R. S. Finite-element
analysis of layered rolling contacts. Proceedings of
the Institution of Mechanical Engineers, Part J: Journal of
Engineering Tribology, 2008, 222(7), 865-886.**

**30. Nikas, G. K., and
Sayles, R. S. A study of lubrication mechanisms using two-phase
fluids with porous bearing materials. Proceedings of
the Institution of Mechanical Engineers, Part J: Journal of
Engineering Tribology, 2008, 222(6), 771-783.**

**29. Nikas, G. K.
Fundamentals of sealing and tribology
of hydraulic reciprocating seals.
In: Proceedings of the 1-day seminar "Focus on Reciprocating
Seals", organised by the Tribology Group of the Institution of
Mechanical Engineers, London, England, 25 June 2008.**

**28. Nikas, G. K. Effects of operating conditions and
friction on the entrapment of spherical debris particles in
elliptical contacts. Proceedings of the Institution of
Mechanical Engineers, Part J: Journal of Engineering Tribology, 2007,
221(6), 727-741.**

**27. Nikas, G. K.,
Burridge, G., and Sayles, R. S. Modelling and
optimization of rotary vane seals. Proceedings of the
Institution of Mechanical Engineers, Part J: Journal of Engineering
Tribology, 2007, 221(6), 699-715.**

**26. Nikas, G. K.
A mechanistic model of
spherical particle entrapment in elliptical contacts. Proceedings of the Institution of Mechanical
Engineers, Part J: Journal of Engineering Tribology, 2006, 220(6),
507-522.**

**25. Nikas, G. K., and Sayles, R. S.
Modelling and
optimization of composite rectangular reciprocating seals. Proceedings of the Institution of Mechanical
Engineers, Part J: Journal of Engineering Tribology, 2006, 220(4),
395-412.**

**24.
Nikas, G. K. Boussinesq-Cerruti functions and a
simple technique for substantial acceleration of subsurface stress
computations in elastic half-spaces.
Proceedings of the Institution of Mechanical Engineers, Part J:
Journal of Engineering Tribology, 2006, 220(1), 19-28.**

23. Nikas, G. K., and Sayles, R. S. Study of leakage and friction of flexible seals for steady motion via a numerical approximation method. Tribology International, 2006, 39(9), 921-936.

**22.**
Nikas, G. K., and Sayles, R. S. Computational model
of tandem rectangular elastomeric seals for reciprocating motion.
Tribology International, 2006, 39(7), 622-634.

** 21. Nikas, G. K., and Sayles, R. S. Nonlinear elasticity
of rectangular elastomeric seals and its effect on
elastohydrodynamic numerical analysis. Sealing
Technology, 2005, 2005(3), 6-11. (Featured article, based on a
previous paper of the authors; invited and compiled by Mr R. Flitney,
Editor of Sealing Technology.)**

** 20. Nikas, G. K. Theoretical study of
solid back-up rings for elastomeric seals in hydraulic actuators.
Tribology International, 2004,
37(9), 689-699.**

** 19. Nikas, G. K., and Sayles, R. S. Nonlinear elasticity
of rectangular elastomeric seals and its effect on
elastohydrodynamic numerical analysis.
Tribology International, 2004, 37(8), 651-660.**

** 18. Nikas, G. K. Transient
elastohydrodynamic lubrication of rectangular elastomeric seals for
linear hydraulic actuators. Proceedings of the Institution of
Mechanical Engineers, Part J: Journal of Engineering Tribology, 2003,
217(6), 461-473.**

** 17. Nikas, G. K. Analytical study of
the extrusion of rectangular elastomeric seals for linear hydraulic
actuators. Proceedings of the Institution of Mechanical
Engineers, Part J: Journal of Engineering Tribology, 2003, 217(5),
365-373.**

** 16. Nikas, G. K. Elastohydrodynamics
and mechanics of rectangular elastomeric seals for reciprocating
piston rods. ASME Journal of Tribology, 2003, 125(1), 60-69.**

** 15. Nikas, G. K. Fatigue life and
traction modelling of continuously variable transmissions. ASME
Journal of Tribology, 2002, 124(4), 689-698.**

** 14. Nikas, G. K. Particle entrainment
in elastohydrodynamic point contacts and related risks of oil
starvation and surface indentation. ASME Journal of Tribology,
2002, 124(3), 461-467.**

** 13. Rana, A., Sayles, R., Nikas, G., and Jalisi, I. An
experimental technique for investigating the sealing principles of
reciprocating elastomeric seals for use in linear hydraulic actuator
assemblies. In: Proceedings of the 2nd World Tribology Congress,
3-7 September 2001, Vienna, Austria, (proceedings on CD-ROM).**

** 12. Nikas, G. K. An advanced model to
study the possible thermomechanical damage of lubricated
sliding-rolling line contacts from soft particles. ASME Journal of Tribology, 2001,
123(4), 828-841.**

** 11. Nikas, G. K. Mathematical analysis
of the entrapment of solid spherical particles in non-conformal
contacts.
ASME Journal of Tribology, 2001, 123(1), 83-93.**

**
10. Nikas, G. K. Theoretical modelling
of the entrainment and thermomechanical effects of contamination
particles in elastohydrodynamic contacts****. Ph.D. and D.I.C. thesis, Imperial
College London and Science Museum Library, also in the Mechanical
Engineering Department Library and in the Tribology Group, Imperial
College London, England, 1999.**

** 9. Nikas, G. K., Sayles, R. S., and Ioannides, E. Thermoelastic
distortion of EHD line contacts during the passage of soft debris
particles. ASME Journal of Tribology, 1999, 121(2), 265-271.**

** 8. Nikas, G. K., Ioannides, E., and Sayles, R. S. Thermal
modelling and effects from debris particles in sliding/rolling EHD
line contacts - A possible local scuffing mode. ASME Journal of
Tribology, 1999, 121(2), 272-281.**

** 7. Nikas, G. K., Sayles, R. S., and Ioannides, E. Effects
of debris particles in sliding/rolling elastohydrodynamic contacts.
Proceedings of the Institution of Mechanical Engineers, Part J:
Journal of Engineering Tribology, 1998, 212(5), 333-343.**

** 6. Nikas, G. K., Sayles, R. S., and Ioannides, E. Effects
of debris particles in sliding/rolling EHD contacts. In:
Proceedings of the First World Tribology Congress, 8-12 September
1997, London, England, p. 271.**

** 5. Nikas, G. K. Elastohydrodynamic
lubrication - a qualitative approach to the problem. Journal of
the Hellenic Association of Mechanical and Electrical Engineers, 1997,
302, 61-62. (Article in Greek, based on the author's Diploma thesis;
invited and edited by the Editor of the Journal.)**

** 4. Nikas, G. K. Load sharing and
profile modification of spur gear teeth in the general case of any
flank geometry. In: Proceedings of the International Conference
on Gears, 22-24 April 1996, Dresden, Germany, VDI Berichte 1230, pp.
923-935.**

** 3. Costopoulos, Th., and Nikas , G.
K. Minimization of spur gear dynamic
loading through the generalized theory of gearing. In:
Proceedings of the International Congress - Gear Transmissions 95,
26-28 September 1995, Sofia, Bulgaria, vol. 1, pp. 52-56.**

** 2. Nikas, G. K., and Costopoulos, Th. Generalized theory of
gearing and elastohydrodynamic lubrication of spur gears. In:
Proceedings of the International Congress - Gear Transmissions 95,
26-28 September 1995, Sofia, Bulgaria, vol. 1, pp. 118-123.**

** 1. Nikas, G. K. Elastohydrodynamic
lubrication and minimization of the dynamic loading of spur gears.
Mechanical Engineering Diploma thesis in Greek. National Technical
University of Athens, Greece, 1994. Library of the Technical Chamber
of Greece (23-25 Lekka Street, 10562 Athens, Greece).**