Căutare Fascicula VIII după Titlu
Afișează articolele 87-106 of 160
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Optimisation of the Tooth Flank Geometry for Non-Standard Spur gear
(Universitatea "Dunărea de Jos" din Galaţi, 2006)In order to increase the transmissible power level of the plastic spur gears, a non-standard tooth is designed, with a variable geometry along the gear facewidth. The variation of the tooth flank geometry, generated by ... -
Overview on the Implementation of Tree Test Methods for Conformity Assessment of Fluids
(Universitatea ”Dunărea de Jos” din Galați, 2006)This paper presents three test methods for conformity assessment of technical fluids, all included in international, European and Romanian standards and their relevance for work security and health. -
Particularities of Rubber Lip Seals Used for Pneumatic Linear Drives
(Universitatea ”Dunărea de Jos” din Galați, 2009)The paper presents some particular aspects of reciprocating rubber lip seals for pneumatic linear drives. This study is focused on the following tribological aspects: friction variation under linear velocity, determination ... -
Postbuckling Behaviour of Composite Plates with Imperfections
(UDJG, 2010)The aim of the work presented in this paper is to analyze the influence of the imperfections on the changes in the buckling behaviour of ship deck plates made of composite materials. Thus, parametric analysis of the ... -
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 ... -
Prediction of Wear of Acetabulum Inserts Due to Multiple Human Routine Activities
(Universitatea ”Dunărea de Jos” din Galați, 2006)It is difficult to predict the quantitative and qualitative aspects of the wear of the components that allow relative motion due to several factors. First, the prosthetic parts in contact experience a wide spectrum of ... -
Preliminary Results on the use of Palm Oil and Shea Butter in Lubrication Process in Food Industry
(Universitatea ”Dunărea de Jos” din Galați, 2009)In this study, vegetal oils (palm oil and shea butter) are analyzed for their uses in lubrication of mechanical part of machines in food industry. These vegetal oils were analyzed by X-ray diffraction and transmission ... -
A Preliminary Study on the Dynamics of Triboemission, Work Function and Surface Charging of Ceramics
(Universitatea ”Dunărea de Jos” din Galați, 2006)This paper discusses the tribological dynamics of electron triboemission and after-contact emission during scratching of ceramics. The origin of such triboemission is still unclear, but the author and colleagues consistently ... -
Preparation of the Injection Moulded Polymeric Parts to Measure the Residual Stress
(Universitatea ”Dunărea de Jos” din Galați, 2009)Polymeric materials are nowadays widely employed as much for the manufacturing of a lot of daily objects as in the high-tech sector. These materials are well known for the extremely complex behavior strongly depending on ... -
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 ... -
Rapeseed Oil Flammability on Hot Surface
(Universitatea ”Dunărea de Jos” din Galați, 2009)The paper presents the tests and results upon rapeseed oil flammability on hot surface. The oil samples were obtained from a rapeseed oil after a dewaxing process. There were established temperature ranges for which the ... -
Research about Roughness resulted at Steel Turning and the Correlation with Piece Surability
(Universitatea "Dunărea de Jos" din Galaţi, 2007)For achieving this study the background of the research in correlation domain between roughness and piece durability are used. This paper performs a new research direction about the roughness, considered such volumetric ... -
Research Issues on Punch - Circular Plate Elastic Contacts
(UDJG, 2010)Circular plates enter into the category of finite dimension bodies. Solutions regarding the displacements and stresses, which appear at the contact involving finite dimension bodies and also numerical and analytical results ... -
Research on Surface Roughness by Laser Cut
(Universitatea ”Dunărea de Jos” din Galați, 2006)Laser cutting is one of the most industrial applications. Laser cutting with oxygen is used primarily for cutting of mild and low-alloyed steels. Cut surface quality is a very important characteristic of laser cutting that ... -
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 ... -
Researches of Distribution of Loading on Coils of Running Pair of the Latch
(Universitatea ”Dunărea de Jos” din Galați, 2006)This paper gives the calculation procedure of pressure distribution on coils of running pair of latch at various loading schemes. Recommendations are provided for the choice of loading schemes of running pair, which ensure ... -
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 ... -
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 ... -
Roughness as Small Surface Defects and Microstructure Changes in the Fatigue Process
(UDJG, 2011)Examinations in detail using X-radiation diffraction of the dislocation substructure in fine-grained S355JR steels plate specimen fatigued with constant amplitude were carried out to investigate the correlation between the ... -
Seizure of a High-Speed Three-Wave Journal Bearing
(Universitatea ”Dunărea de Jos” din Galați, 2008)This paper is focused on the geometry and operating parameters of the bearing experimentally studied at NASA Glenn Research Center by F. Dimofte. It presents two simple thermoelastohydrodynamic (TEHD) models for two typical ...
