Caută
Afișează articolele 1-10 of 35
Flammability Test Data in Risk Assessment
(Universitatea ”Dunărea de Jos” din Galați, 2008)
This paper reviews the most recent information on standards dealing with testing fire-resistance of hydraulic fluids in order to emphasis the importance of selecting hydraulic fluids including as basic criteria of reducing ...
Viscosity of Amorphous Molecular Substances
(Universitatea ”Dunărea de Jos” din Galați, 2008)
Because the great majority of flow units in a liquid behave instantaneously in a solid-like manner, rheological properties of molecular liquids subjected to high pressures may be measured by using corresponding molecular ...
Dynamics of Hip Artificial Joints Wear
(Universitatea ”Dunărea de Jos” din Galați, 2008)
In the present paper the authors try to evaluate, based on the results obtained from experimental and numerical previous studies, the wear evolution in the components of a Total Hip Prosthesis (THP), during the service ...
Contact Model for a Rough Surface
(Universitatea ”Dunărea de Jos” din Galați, 2008)
The paper presents a model for the determination of the contact characteristics, pressure distribution and subsurface stress field at the contact cylinder- plane. The first part of the paper presents the geometrical models ...
Residual Stresses Effect on Fatigue Life of Rolling Contacts
(Universitatea ”Dunărea de Jos” din Galați, 2008)
The fatigue life tests carried out on two groups of ball bearings point out the positive influence of the compressive residual stresses induced by a previous loading in the elastic-plastic domain. The values of residual ...
Shear Stability as Oils’ Performance Indicator
(Universitatea ”Dunărea de Jos” din Galați, 2008)
The paper presents a comparative analysis between the shear stability tests results and four ball tests results for some industrial oils. This correlation is used for establishing the way how the mechanical solicitations ...
Research Rearding of Composite Materials under the Influence of Abrasive Wear
(Universitatea ”Dunărea de Jos” din Galați, 2008)
The method described in the paper will allow estimating the composite materials performances with different structures and various working conditions, with a view to estimate useful life of technological equipments parts ...
New Test Facility for Fluid Film Journal Bearings
(Universitatea ”Dunărea de Jos” din Galați, 2008)
This paper describes a new experimental rig to test journal fluid film bearings. It has been operating at the NASA Glenn Research Center (GRC) in Cleveland, Ohio since August 2006. The rig can apply total radial loads of ...
Influence of Shear Stability on Oils Behaviour
(Universitatea ”Dunărea de Jos” din Galați, 2008)
The paper presents a method to establish a link between the shear stability index and service behaviour of motor oils. A standardized method for shearing stability establishing is combined with appropriated curve fitting ...
Investigation of Layers Formed Through Selective Transfer with Atomic Force Microscopy
(Universitatea ”Dunărea de Jos” din Galați, 2008)
Atomic force microscopy (AFM) has become a versatile tool for investigating local mechanical properties. In addition, through the AFM tip-couple interaction, it is possible to study the effects of perturbations and ...