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Titolo: Modeling of the nonlinear rheological behavior of a lubricating grease atlowshear rates
Autore: Madiedo, JM; Franco, JM; Valencia, C; Gallegos, C;
 Indirizzi:
 Univ Huelva, Escuela Politecn Super, Dept Ingn Quim, Palos De La Frontera 21819, Huelva, Spain Univ Huelva Palos De La Frontera Huelva Spain 21819 21819, Huelva, Spain
 Titolo Testata:
 JOURNAL OF TRIBOLOGYTRANSACTIONS OF THE ASME
fascicolo: 3,
volume: 122,
anno: 2000,
pagine: 590  596
 SICI:
 07424787(200007)122:3<590:MOTNRB>2.0.ZU;2G
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 YIELD STRESS; TRANSIENT FLOW; MAYONNAISE; SLIP;
 Keywords:
 constitutive equation; lubricating grease; normal stresses; transient flow; viscoelasticity; viscosity; very low shear rate motion;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Engineering, Computing & Technology
 Citazioni:
 42
 Recensione:
 Indirizzi per estratti:
 Indirizzo: Madiedo, JM Univ Huelva, Escuela Politecn Super, Dept Ingn Quim, Palos De La Frontera 21819, Huelva, Spain Univ Huelva Palos De La Frontera Huelva Spain 21819 va, Spain



 Citazione:
 J.M. Madiedo et al., "Modeling of the nonlinear rheological behavior of a lubricating grease atlowshear rates", J TRIBOL, 122(3), 2000, pp. 590596
Abstract
This paper deals with modeling the nonlinear rheological behavior of lubricating greases at very low shear rates. With this aim, dynamic linear viscoelastic, nonlinear stress relaxation, transient and steadystate shear flow, and transient first normal stress difference measurements have been carried out on a diureaderivative lubricating grease. A factorable nonlinearviscoelasticity model, the Wagner integral model, derived from the KBKZ constitutive equation, was used in order to predict the nonlinear rheological response of the abovementioned lubricating grease under shear. The timedependent part of the model was described by its linear relaxation spectrum, whilst two different damping functions (Wagner and SoskeyWinter's damping functions) were analysed as the straindependent factor. The continuous linear relaxation spectrum was estimated, using regularization techniques, from the dynamic linens viscoelasticity, functions. The damping function was calculated from nonlinear stress relaxation tests. The constitutive model, with SoskeyWinter's damping function, predicted the steadystate flow curve, the transient shear stress and the transient first normal stress differences of the lubricating grease studied fairly well. [S07424787(00)016039].
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 22:22:24