Zobrazeno 1 - 10
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pro vyhledávání: '"K. Nikas"'
Autor:
George K. Nikas
Publikováno v:
Lubricants, Vol 8, Iss 5, p 60 (2020)
A metallic particle passing through concentrated rolling-sliding contacts is often linked to surface damage for particles larger than the available gap. At the instant of particle pinching, force balancing dictates particle entrapment and passing thr
Externí odkaz:
https://doaj.org/article/a7b0fed3497248cdaaa12c78660799cf
Autor:
George K. Nikas
Publikováno v:
Lubricants, Vol 8, Iss 4, p 40 (2020)
Hydraulic dynamic seals for reciprocating or alternating motion are machine elements with widespread applications in the automotive, aerospace, marine, pharmaceutical and several other industrial sectors. They have been under commercial development f
Externí odkaz:
https://doaj.org/article/86fa88b5c46141ceabda4fa024f452f2
Autor:
George K. Nikas
Publikováno v:
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 235:2227-2246
The entrapment/rejection process of spherical, rigid microparticles in elliptical, rough elastohydrodynamic contacts is modelled. An earlier model of the author is extended to include van der Waals intermolecular forces, in addition to mechanical (re
Autor:
George K. Nikas
Publikováno v:
Lubricants, Vol 6, Iss 3, p 77 (2018)
Hydraulic, reciprocating, polymeric seals are met in many engineering applications and are critical components for mechanism and machine reliability in industries including the automotive, marine, and aerospace industries. A parametric and optimizati
Externí odkaz:
https://doaj.org/article/bd25718225ac4594a19fa4d80b1b8859
Autor:
George K. Nikas
Publikováno v:
Tribology International. 128:34-51
Solid mechanics and rough thermoelastohydrodynamics of hydraulic, rectangular-rounded, reciprocating seals with hydrodynamic, asperity, deformation and van-der-Waals stresses are analytically formulated. Seal swelling or shrinkage by fluid exchange a
This review aims to explore, present, and discuss disorders of glucose metabolism implicated in pituitary gland diseases, the appropriate interventions, as well as the therapeutic challenges that may arise. Pituitary pathologies may dysregulate gluco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2127::fcb0a54a8ff9c5306b045da5761d7d6a
https://pergamos.lib.uoa.gr/uoa/dl/object/uoadl:3077322
https://pergamos.lib.uoa.gr/uoa/dl/object/uoadl:3077322
Publikováno v:
Δελτίο της Ελληνικής Γεωλογικής Εταιρείας; Τόμ. 40 Αρ. 2 (2007): 11o διεθνές Συνέδριο της ΕΓΕ; 523-535
Bulletin of the Geological Society of Greece; Vol. 40 No. 2 (2007): 11th International Conference of the Geological Society of Greece; 523-535
Bulletin of the Geological Society of Greece; Vol. 40 No. 2 (2007): 11th International Conference of the Geological Society of Greece; 523-535
Αντικείμενο της παρούσας εργασίας αποτελεί η διερεύνηση της σχέσης «βροχόπτωση- απορροή» σε οκτώ υδρολογικές λεκάνες της ΒΑ Αχαΐας μετ
Autor:
George K. Nikas
Publikováno v:
International Journal of Solids and Structures. :111240
An approximate analytical formulation for the quasi-static, normal, elastoplastic indentation of ductile materials is presented. Explicit equations are derived, which describe the geometrical profile of material piling up above the original surface i
Autor:
George K. Nikas
Publikováno v:
Tribology International. 110:252-263
Traction in elastohydrodynamic contacts causes normal surface displacements, affecting the lubricant film thickness. This is ignored in the vast majority of published theoretical studies and film-thickness regression formulae. This article analytical
Autor:
George K. Nikas
Publikováno v:
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 231:1320-1340
The author’s model of particle entrapment and thermoviscoplastic indentation built and experimentally validated in recent publications is utilised to calculate the contact forces on ductile, isolated interference particles passing through elastohyd