Gadallah, M. H., and H. El-Mounayri,
"MODELING for OPTIMIZATION (MO-OP):TOOLS for MANUFACTURING and DESIGN ENGINEERING PROBLEMS",
ASME 2001 Design Engineering Technical Conference, Pittsburgh, PA, September 9-12, 2001, September 9-12, , 2001.
Osman, T. A.,
Misalignment Effect on the Static Characteristics of Magnetized Journal Bearing Lubricated with Ferrofluid,
, vol. 11, issue 3, pp. 195 - 203, 2001.
AbstractIn this paper a generalized Reynolds equation suitable for misaligned hydrodynamic journal bearings lubricated by either Newtonian or non-Newtonian ferrofluid is developed. The equation has been solved numerically by the finite difference technique with an appropriate iterative method and the pressure distributions have been obtained. Design charts for all static characteristics (including load capacity, attitude angle, side flow, friction force and misaligned moments) under different misalignment conditions are presented. The effects of misalignment conditions on all these bearing-performance characteristics are analyzed. The results conclude that magnetic lubrication improves, in general, the bearing performance under misalignment.
El-Shafee, E., G. R. Saad, and S. M. Fahmy,
"Miscibility, crystallization and phase structure of poly(3-hydroxybutyrate)/cellulose acetate butyrate blends",
European Polymer Journal, vol. 37, issue 10, pp. 2091 - 2104, 2001.
AbstractBlends of poly(3-hydroxybutyrate) (PHB) with cellulose acetate butyrate (CAB) were prepared by solution casting from chloroform solutions at different compositions. The miscibility, crystallization behavior and phase structure were investigated using differential scanning calorimetry, optical microscopy and small-angle X-ray scattering (SAXS). CAB/PHB blends were found to be miscible in the melt state as evidenced by the deduction of a single glass transition (Tg) for each composition, a depression in the equilibrium melting point of PHB, and a marked reduction in the spherulites growth rate of PHB in the PHB/CAB blends. The Flory-Huggins interaction parameter (χ12), obtained from melting point depression data, is composition dependent, and its value is always negative. The nucleation factor, Kg, was determined using Lauritzen-Hoffman model. The Kg values for the PHB in the blends are considerably lower than the Kg value in the pure homopolymer. The phase structure of the blend in the solid state as revealed by SAXS is characterized by the presence of a homogeneous amorphous phase situated mainly in the interlamellar regions of crystalline PHB and consisting of CAB molecules and uncrystalline PHB chains. © 2001 Elsevier Science Ltd. All rights reserved.