**47.
Nikas, G. K.
Friction and wear of seals.
ASM Handbook Vol. 18 - Friction, Lubrication, and Wear Technology,
2017, article 92; in press.**

**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).**