Extension viscosity, fibre stretch and normal stress of lubricating greases

• Autorzy: Kempe J. , Sanllorente M. , Schüler M.
• Języki publikacji: EN

Abstrakty

EN

The extension viscosity increases for five examined greases above an individually different border area of the rate of extension. The maximum of the extension length could be measured. The formed fibres obtain substantial higher stretch almost close to the extension rate at which the extension viscosity starts to increase. It is suggested that there is a relation between the normal stress in shear tests and the tendency to form long fibres by drag.

Słowa kluczowe

EN

lubricating grease; rheology; extension viscosity; normal stress; fibre stretch

PL

reologia; smar; lepkość

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2002
• Tom: Vol. 7, no 3
• Strony: 813--822
• Opis fizyczny: Bibliogr. 2 poz., tab., wykr.

Twórcy

autor

Kempe J.

• University of Applied Science Dresden Friedrich List Platz 1, D-01069 Dresden, GERMANY

autor

Sanllorente M.

• University of Applied Science Dresden Friedrich List Platz 1, D-01069 Dresden, GERMANY

autor

Schüler M.

• University of Applied Science Dresden Friedrich List Platz 1, D-01069 Dresden, GERMANY

Bibliografia

• [1] Brenner H. (1974): Rheology of a dilute suspension of axisymmetric Brownian particles. - Int. J. Multiphase Flow, vol.l, pp. 195-341.
• [2] Spiegelberg S.H. and McKinley G.H. (1996): The role of end-effects on measurements of extensional viscosity in filament stretching rheometers. - J. Non-Newton. Fluid Mech., vol.67, pp.49-76.