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Afișează articolele 931-940 of 1945
Monitoring the Influence of Thermomagnetic Treatment on the Ion Nitrided Layer Using Microhardness Curves, for 42MOCR11 Steel Grade Case
(UDJG, 2010)
Each of the stages of heat treatment in magnetic field (AC or DC) influences the hardness and durability of different steels. This influence is extended in the case of the measured microhardness values obtained in the ...
Structure Assessment by X-Ray Difractometry for Ceramic Materials used in Oral Prosthetic Systems
(Universitatea ”Dunărea de Jos” din Galați, 2009)
The paper presents a difractometric analysis on two types of ceramics nowadays available on the market and frequently used in restorative dentistry: InLine (IVOCLAR) and Hera-Ceram (HAEREUS KULZER). The diffractograms ...
A Fast Numerical Method to Predict Elastic Fields Due to Eigenstrains in an Isotropic Half-Space PartII. Program Validation and Simulations
(Universitatea ”Dunărea de Jos” din Galați, 2009)
A fast algorithm to solve the inclusion problem for arbitrarily shaped eigenstrains is validated in this paper. Influence coefficients formulas and numerical predictions for elastic fields due to a spherical region of ...
A Three-Dimensional Elastic-Plastic Analysis of Rolling Contacts
(UDJG, 2010)
An analysis model has been developed to model the nonlinear strain rate dependent deformation of rolling bearing steel stressed in the elastic-plastic domain. The model is designed in the frame of the incremental theory ...
The Influence of the Sintering Atmospheres on the Wear Behaviour of the Copper Based Alloys
(UDJG, 2010)
The Powder Metallurgy (PM) technique allows manufacturing the sintered selflubricating materials having a high wear resistance. It is well known that the small and medium sized bearings are processed by PM with better ...
Surface Roughness Parameters Evolution Under Fatigue Loading
(UDJG, 2010)
The main objective of this paper is to demonstrate that in order to have a complete characterisation of fatigue degradation it is necessary to analyze the evolution of surfaces roughness, which can become a stress ...
Power Losses Estimation in Precessional Gear
(UDJG, 2010)
Having established the estimation relations of power losses in basic kinematical joints, it becomes relatively simple to establish the estimation relation of kinematical precessional transmission efficiency which, on the ...
The Reliability of the Rlac Bore-Hole Pumps
(UDJG, 2010)
The paper aims to present a study concerning the determination of the borehole pumps operating reliability. The considered bore-hole pump for this study is RLAC 2 7/8 x 1¾ in x 32c type and it equips the oil-wells of ...
Numerical and Experimental Investigations Upon Articular Cartilage Mechanical Hysteresis
(UDJG, 2010)
The paper presents biomechanical and tribological considerations upon articular cartilage. The experimental in vitro results from static and dynamic contact tests are presented together with numerical modelling of the ...
Dynamic Response of Ship Hull Composite Laminated Shells to Explosive Pressure
(UDJG, 2010)
The paper presents selected results of a study concerning the protective capacity of ship hull structures made of composite materials subjected to an explosion of a spherical charge. The main application of these structures ...