| prof. dr hab. inż. Stefan Zahorski |
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Habilitacja
| 1966 | Pewne zagadnienia ruchu i stateczności ośrodków nieliniowo - lepkosprężystych | 754 |
Profesura
| 1972 | Nadanie tytułu naukowego profesora |
Promotor prac doktorskich
| 1. | 1979 | Koliński Andrzej | Zagadnienia dynamicznych odkształceń elementów gumowych wzmacnianych włóknami | ||
| 2. | 1976 | Tokarzewski Stanisław | Ocena dynamicznych własności lepkosprężystych anizotropowych materiałów złożonych | ||
| 3. | 1972 | Gosiewski Mieczysław | Kontynualny model złożonej cieczy z oddziaływaniami typu van der Waals'a |
Ostatnie publikacje
| 1. | Zahorski S., Effect of small-amplitude vibrations on viscoelastic flows in a plane slider bearing, Rheologica Acta, ISSN: 0035-4511, DOI: 10.1007/BF01534337, Vol.21, pp.524-526, 1982 Streszczenie: The qualitative changes of dynamic lift and friction forces caused by small-amplitude harmonic vibrations superimposed on flows in a plane slider bearing are considered for simple viscous and viscoelastic lubricating fluids. Low- and high-frequency disturbances are analysed in greater detail and the most beneficial situations discussed. Afiliacje autorów:
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| 2. | Zahorski S., On finite amplitude shear waves in viscoelastic fluids, Journal of Non-Newtonian Fluid Mechanics, ISSN: 0377-0257, DOI: 10.1016/0377-0257(79)85021-1, Vol.5, pp.315-322, 1979 Streszczenie: It is shown that circular as well as elliptic shearing flows of incompressible simple fluids can be treated as a subclass of motions with proportional stretch history (cf. [3]). For circular shearings, the known results on circularly polarized shear waves are derived in a different way, while for more general elliptic shearings certain new results on low frequency elliptically polarized shear waves are discussed. Afiliacje autorów:
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| 3. | Zahorski S., Viscoelastic properties in plane squeeze-film flows, Journal of Non-Newtonian Fluid Mechanics, ISSN: 0377-0257, DOI: 10.1016/0377-0257(78)80004-4, Vol.4, No.3, pp.217-228, 1978 Streszczenie: In this paper, we consider the problem of plane squeeze-film flows in a kinematics based on the formalism of convected (moving and deforming) coordinates. The flows discussed are treated as instantaneous motions with proportional stretch histories (cf. [16]). Certain simplifications in the constitutive equations of an incompressible simple fluid (cf. [10]) have been achieved for moderately low Deborah numbers. Afiliacje autorów:
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| 4. | Zahorski S., Pewne niewiskozymetryczne przepływy cieczy lepkosprężystych, JOURNAL OF THEORETICAL AND APPLIED MECHANICS, ISSN: 1429-2955, Vol.10, No.1, pp.29-51, 1972 Streszczenie: Recent interests in various non-viscometric flows of viscoelastic fluids such as polymer melts and solutions result from the progress made in the field of theoretical rheology as well as from the needs for investigation of more complicated flows in new rheometers. Among all non-viscometric flows of simple fluids a particular position is filled by motions with constant stretch history. These motions differ significantly from the well known class of steady viscometric flows, characterized entirely by three material functions and include, among others, the types of flows realized in the Maxwell Orthogonal Rheometer, the Kepes Balance Rheometer etc. In the first part of our review the general theory of non-iscometric flows with constant stretch history is outlined. The second part deals with various classes of flows, especially those occurring in the recently constructed rheometers. The possibilities of determination of dynamic rheological characteristics as well as normal stress effects are discussed in greater detail. Afiliacje autorów:
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| 5. | Zahorski S., Niewiskozymetryczne przepływy z proporcjonalną historią deformacji, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.20, pp.1-32, 1972 | ||||
| 6. | Zahorski S., Przepływy ze stałą historią deformacji oraz lepkość przy rozciąganiu, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.1, pp.1-23, 1971 | ||||
| 7. | Zahorski S., Pewne niewiskozymetryczne przepływy cieczy lepkosprężystych, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.31, pp.1-42, 1971 | ||||
| 8. | Zahorski S., Wpływ własności sprężystych na niestateczność cieczy, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.1, pp.1-20, 1969 | ||||
| 9. | Zahorski S., Dyfuzja własności lepkosprężystych w zagadnieniu stateczności przepływu, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.25, pp.1-32, 1969 | ||||
| 10. | Zahorski S., Kinematics and Statics of Small Superposed Deformations, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.8, pp.1-25, 1968 | ||||
| 11. | Zahorski S., Prosty model nieprostych ośrodków sprężystych. - Zastosowanie do polimerów usieciowanych, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.3, pp.1-23, 1967 | ||||
| 12. | Zahorski S., On a local instability of motion for some cases of viscoelastic fluids, INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS, ISSN: 0020-7462, DOI: 10.1016/0020-7462(66)90004-7, Vol.1, No.3, pp.193-207, 1966 Streszczenie: The method of small additional deformations superposed on a fundamental motion of the Rivlin-Ericksen viscoelastic medium (cf. [1]) has been applied to the case of slow steady simple extension or compression of a circular cylinder. The closed form solutions are obtained for the first order approximation, and some types of the stability loss are discussed. It is shown that the considered cylinder is unstable if the characteristic ratio of the radius to the length of a cylinder takes the corresponding critical values. Afiliacje autorów:
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