Caută
Afișează articolele 1-10 of 16
Researches on the Presence of Hydrogen During Continuous Casting of Steel
(Universitatea ”Dunărea de Jos” din Galați, 2009)
Due to the negative effects that hydrogen has on steels, its content in steels has lately been given special attention. The paper presents the evolution of hydrogen content in steel during the manufacturing and continuous ...
An Analytical Procedure to Incorporate the Bauchinger Effect on Fretting Fatigue Models
(Universitatea ”Dunărea de Jos” din Galați, 2009)
This paper proposes a modification on SWT model concerning the prediction on fretting fatigue life, in order to take into account the material deviation from the ideal elastic-plastic behaviour, the so-called “Bauschinger ...
Characterisation of Particulate Epoxy Composites
(Universitatea ”Dunărea de Jos” din Galați, 2009)
Among composites, the polymer matrix ones are the cheapest and the easiest to form but they show major disadvantages such as poor electrical and thermal conductivity, low fire resistance etc. In the case of any composite, ...
On the Effect of Spectral Characteristics of Roughness on Contact Pressure Distribution
(Universitatea ”Dunărea de Jos” din Galați, 2009)
In the first part of the paper, the matrix containing the roughness heights is obtained by a linear transformation of the Gaussian input matrix, the coefficients of the transformation matrix being found as solutions of a ...
A Numerical Solver for the Wheel-Rail Contact Subjected to Combined Loads
(Universitatea ”Dunărea de Jos” din Galați, 2009)
A working algorithm, able to be incorporated into a computer code, has been developed to solve the stress state in the general case of non-Hertzian contacts. Brent’s method has been involved to find the contact point for ...
Damage Prediction in Fatigue Corrosion Processes
(Universitatea ”Dunărea de Jos” din Galați, 2009)
The paper aims to establish an algorithm for determining the values and evolution of the stress concentration factor in corrosive environment, and establish its influence on the fatigue strength of steel required in a ...
Experimental Study of Friction Losses in Ball Screws
(Universitatea ”Dunărea de Jos” din Galați, 2009)
In contrast with conventional sliding lead screws, ball screws with rolling friction between the screw and nut have high efficiency, accurate positioning and smooth, quiet operation at low friction that make this kind of ...
Influence of Sliding Speed and Average Pressure in Dry Regim Upon Wear of Composite with PA and Micro Glass Spheres
(Universitatea ”Dunărea de Jos” din Galați, 2009)
The papers presents the wear results of testing a set of composites PA + 1% black carbon + x% micro glass spheres, where x is the micro glass sphere concentration (x=0, 5, 10, 20, 30wt) using a pin-on-disc tribotester, for ...
Principles and Methodologic Peculiarities in the Research of the Tribosystem with Sliding on Translation Cyclic Movement
(Universitatea ”Dunărea de Jos” din Galați, 2009)
The work presents methodological aspects of behavior research in the cyclical slip tribosystems regarding the dynamics of contact processes. Taking into account the fact that in the contact, processes of various origins ...
Statistical Assessment of Surface Quality Using 3D Profilometry Parameters
(Universitatea ”Dunărea de Jos” din Galați, 2009)
he paper presents a statistical analysis for quality assessment of metallic surfaces and coating in order to use the conclusions for improving coating technology. Surface investigation was done with the help of a 3D ...