Proceedings of SerbiaTrib '13

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- in dry condition the Ti6Al4V/Al 2 O 3 contactpair showed a high functional integrity degree ofthe surfaces in terms of surface quality,characterized by roughness parameters Sa, Sq andSy, while for the Ti6Al4V/steel ball based on theroughness parameter Sv;- in the case of Ti6Al4V/steel ball contact pair abetter functional integrity (evaluated based on theweight loss) occurred for higher applied loads thanin the case of lower loads;- from the point of view of the electrochemicalbehavior a higher functional integrity occurs in thecase of Ti6Al4V/Al 2 O 3 contact pair at lowerapplied loads (assessed through parameters E corrand I corr );- the electrochemical parameters forTi6Al4V/Al 2 O 3 contact pair are at a lower levelthan those of the Ti6Al4V/steel ball contact pair;- the evolution of the roughness parameters andthe structural affinity between TI6Al4V alloy andthe bearing ball conduced to a higher functionalintegrity level from the point of view of theevolution of COF by comparison to Ti6Al4V/Al 2 O 3contact pair.REFERENCES[1] B. Griffiths, Manufacturing Surface Technology-Surface Integrity and Functional Performance,Prenton Press, 2001.[2] G. Bellows, D. N. Tisher, Introduction to surfaceIntegrity Report TM70-974, Cincinnati: GeneralElectric Co., 1970.[3] N. Aris, K. Cheng, Characterization of the surfacefunctionality on precision machined engineeringsurfaces, International Journal of AdvancedManufacturing, Vol. 38, pp. 402-409, 2008.[4] I.S. Jawahir, E. Brinksmeier, R. M'Saoubi, D.K.Aspinwall, J.C. Outeiro, D. Meyer, D. Umbrello,A.D. Jayal, Surface integrity in material removalprocesses: Recent advances, CIRP Annals -Manufacturing Technology, Vol. 60, pp. 603–626,2011.[5] J.F. Archard, Wear theory and mechanisms. In:M.B. Peterson, W.O. Winer, Wear ControlHandbook. ASME, 1980.[6] R. J. K. Wood, Tribo-corrosion of coatings: areview, J. Phys. D: Appl. Phys., Vol. 40, pp. 5502–5521, 2007.[7] P. Ponthiaux, F. Wenger, D. Drees, J.P. Celis,Electrochemical techniques for studyingtribocorrosion processes, Wear, Vol. 256, pp. 459–468, 2004.[8] S. Mischler, S. Debaud, D. Landolt, Wearacceleratedcorrosion of passive metals intribocorrosion systems, Journal of theElectrochemical Society, Vol. 145, pp. 750-758,1998.[9] J. Perret, Modélisation de la tribocorrosion d'aciersinoxydables dans l'eau à haute pression et hautetempérature, Thèse No 4727 (2010) ÉcolePolytechnique Fédérale De Lausanne.[10] S. Feliu, J. A. Gonzalez, S. Miranda, Possibilitiesand Problems of in Situ Techniques for MeasuringSteel Corrosion Rates in Large Reinforced ConcreteStructures, Corrosion Science, Vol. 47, pp. 217-238,2005.[11] H. H. Uhlig, R. W. Revie, Corrosion and CorrosionControl, 3rd Edition, John Wiley and Sons, NewYork, 1985.[12] M. Stern, A. L. Geary, ElectrochemicalPolarization, A Theoretical Analysis of the Shape ofPolarization Curves, Journal of ElectrochemicalScience, Vol.104, pp. 56-63, 1957.[13] V. Mereuta, M. Buciumeanu, L. Palaghian, 3DRoughness Parameters as Factors in Determiningthe Evolution of Effective Stress ConcentrationFactors in Fatigue Processes, Applied Mechanicsand Materials Vol. 248, pp 504-510, 2013.86 13 th International Conference on Tribology – Serbiatrib’13
Serbian TribologySocietySERBIATRIB ‘1313 th International Conference onTribologyKragujevac, Serbia, 15 – 17 May 2013Faculty of Engineeringin KragujevacFRICTION COEFFICIENT OF UHMWPE DURING DRYRECIPROCATING SLIDINGFatima Živić 1 , Miroslav Babić 1 , Slobodan Mitrović 1 , Dragan Adamović 1 , Svetlana Pelemis 21 Faculty of Engineering, University of Kragujevac, Serbia, zivic@kg.ac.rs, babic@kg.ac.rs, boban@kg.ac.rs, adam@kg.ac.rs2 Faculty of Technology in Zvornik, University of East Sarajevo, Bosnia and Herzegovina, alannica@gmail.comAbstract: This paper deals with the friction coefficient behaviour during dry reciprocating sliding ofUHMWPE in contact with alumina (Al2O3), within a range of velocities typical for hip implants. Five valuesof normal force (100 - 1000 mN) and three values of sliding speed (4 - 12 mm/s) have been observed. Realtime diagrams of the friction coefficient as a function of the sliding cycles were recorded for each test.Dynamic friction coefficient curves exhibited rather uniform behavior for all test conditions. Somewhatlarger values of friction coefficient could be observed during the running-in period in case of low loads(100-250 mN) and the lowest velocity (4 mm/s). In case of high loads and speeds, friction coefficient reachedsteady state values shortly after the beginning of the test.Keywords: UHMWPE, Dynamic friction coefficient, Reciprocating sliding.1. INTRODUCTIONUltra-high molecular weight polyethylene(UHMWPE) is a unique polymer with outstandingphysical and mechanical properties. Most notableare its chemical inertness, lubricity, impactresistance, and abrasion resistance. The first clinicalapplication of UHMWPE biomaterials started in1962 and continued with astonishing speed throughthe three decades of the clinical history (1962–1997), with a few clinically relevant innovationsoccurred beyond the removal of calcium stearateand changes in sterilization practice. Radiationcrosslinked UHMWPE materials had been recentlyintroduced to clinical practice around a year 2000.Today, second generation of radiation crosslinkedmaterials are in clinical use, and vitamin Estabilized UHMWPE has emerged as a new,internationally standardized biomaterial.At the November 2012 ASTM Meeting inAtlanta, GA, the UHMWPE working groupconsidered revisions to four UHMWPE-relatedstandards, including F648 (unfilled UHMWPEhomopolymer), F2102 (FTIR analysis ofoxidation), F2565 (Guide for CrosslinkedUHMWPEs), and a new standard for small punchtesting of medical polymers, including UHMWPE,based on F2183. The next ASTM meeting of theUHMWPE working group will be in May, 2013.All existing data on UHMWPE indicate that forvery elderly patients, artificial joints incorporatingconventional UHMWPE will continue to be used.On the other hand, the more recently-introducedalternative bearing technologies, includingcrosslinked UHMWPE, should provide the greatestbenefit to young patients (less than 60 years in age)who lead an active lifestyle and who need a totalhip replacement. For patients in need of kneearthroplasty, shoulder arthroplasty, or total discreplacement, conventional UHMWPE continues toprevail as the polymeric bearing material of choice.Polymers are large molecules synthesized fromsmaller molecules, called monomers. Plastics arepolymers that are rigid solids at room temperatureand generally contain additional additives.UHMWPE has been used as a bearing surface, intotal joint prostheses, for more than 45 years.Each year, about 2 million joint replacementprocedures are performed around the world, and themajority of these joint replacements incorporateUHMWPE. Despite the success of these restorativeprocedures, orthopedic and spine implants haveonly a finite lifetime. Wear and damage of theUHMWPE components has historically been one of13 th International Conference on Tribology – Serbiatrib’13 87
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SerbianTribologySocietyFacultyofEng
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Serbian Tribology SocietyUniversity
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Supported byMinistry of Education,
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PrefaceThe International Conference
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ContentsPlenary Lectures1. THE GREE
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27. WEAR CHARACTERISTICS OF HYBRID
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Tribometry57. PRELIMINARY STUDY ON
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Plenary Lectures13 th International
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Serbian TribologySocietySERBIATRIB
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Figure 4. Diagram of the height and
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Realization of the approach is base
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edge without chamfer and smaller ra
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Figure 7. Accumulated tool life in
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Figure 13. Calculated and measured
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Friction deformation of the bronze
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engine cylinders of 2-cylinder-twot
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Table 1: Chemical composition of sa
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Table 4: Comparative wear-resistanc
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- measuring of coating thickness h
Page 49 and 50: Figure 5. Functional scheme of the
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Page 53 and 54: Table 2. Test results for massive w
Page 55 and 56: knowledge transfer in the field ofm
Page 57 and 58: Table 1. Parameters of the electroc
Page 59 and 60: Figure 6. Wear resistance by linear
Page 61 and 62: coatings and observed their good we
Page 63 and 64: c)a)Figure 2: SEM images and micros
Page 65 and 66: Room temperature 300°CNi/µSiCNiNi
Page 67 and 68: COF [-] COF [-]Fig.9: COF graphs at
Page 71 and 72: about 260 nm is related to isolated
Page 73 and 74: contact’s conformity [18] they ob
Page 75 and 76: In order to calculate the metallic
Page 77 and 78: microscopic inspection of the Rp3 s
Page 81 and 82: otating plate. The shaft passes thr
Page 83 and 84: similar trends of variation are obs
Page 85 and 86: smooth, gear fiber-mild steel rough
Page 87 and 88: [2] Tabor, D.: “Friction and wear
Page 91 and 92: (10, 50 and 100 N) against surface
Page 93 and 94: [9] B.R. Gligorijevic, A. Vencl, B.
Page 95 and 96: dielectric properties, high resista
Page 97 and 98: parameter, Sv, was slightly influen
Page 99: dependence of roughness height and
Page 103 and 104: Polyethylenes with a molecular weig
Page 105 and 106: [9] K.S. Kanaga Karuppiah, A.L. Bru
Page 107 and 108: MgCO3•CaCO3 (13% Mg), and carnall
Page 109 and 110: fully compatible with MRI/MSCT imag
Page 111 and 112: 5. CONCLUSIONThe magnesium alloys a
Page 113 and 114: Zinc dialkyldithiophosphate (ZDDP)
Page 115 and 116: C- Lower deposits with NPNA on comb
Page 117 and 118: films. Carraro et al. [10] examined
Page 119 and 120: PlateCount No.Critical Load ( N)120
Page 121 and 122: solid melt of ZA27 alloy using mech
Page 123 and 124: SiC particles are uniformly distrib
Page 125 and 126: in number of micro-cracks and clust
Page 129 and 130: PBT has the average values of the f
Page 131 and 132: mechanical pressure and thermal loa
Page 135 and 136: 3. EXPERIMENTAL RESULTSTaking into
Page 137 and 138: [12] L. Blunt De, X. Jiang: Advance
Page 139 and 140: 2. EXPERIMENTALTESTING2.1 MaterialT
Page 141 and 142: figure 3a it could be seen that the
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Page 147 and 148: 5. CONCLUSIONFigure 11. The accumul
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esistance was found for composite c
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onze, which is embedded within the
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The test contact pair meets the req
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complete. The SEM analysis maycontr
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tg( ) tg 100, [%] (2)tgwhere are:
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corresponding to the maximum value
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electrostatics [17]. Due to the fle
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250nm size have been observed, acco
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ETH Zurich, Switzerland, where all
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comparison with the synthetic reinf
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3. RESULTS AND DISCUSSION3.1 Micros
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(a)(b)Figure 4. Showing (a) variati
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composites. But the composite compo
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coated and uncoated region after ad
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has been measured between the top s
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Fig. 9 shows the wear track obtaine
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Mica samples preparationFor the ads
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According to the AFM results in fig
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[21] B. G. Sharma et al.: Character
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chemical vapor deposition method wi
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analysis (a) and an approximate che
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Table 3. Friction coefficients of s
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A.K.Oleynik, V.M.Matsevity, ea.]. /
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Most of the friction units of produ
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In order to provide both high parts
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Fig. 3. The comparison the criterio
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Table 3. Experimental and calculate
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For developing the numerical model
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,eccentricities and hydrodynamic pr
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hydrodynamic regime. However, for b
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to obtain the temperature distribut
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force (pressure) between two contac
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5E-06The total displacement [m]4.5E
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[11]. Figure 5 shows s the influenc
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efficiency of use, product quality,
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38GSA. The chemical composition, de
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niobium. It should be noted that fo
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Figure 1. Friction force on side su
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exploitation this changing is signi
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2. EFFICIENCY OF CYCLO DRIVEEfficie
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Figure 6. Dependence of cyclo drive
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common for their ability to be inst
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FNF (11)R sin cos11 21 22FNF
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Normal force [N]4000350030002500200
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analytical tests. The analytical te
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Table 4. Results of zero samples of
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noticeable, and by the end of explo
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4. PLASTIC BEARING APPLICATIONSRega
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For Elastohydrodynamic film thickne
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The results concluded for different
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For Thrust Force of 40KNKrytox 215
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Krytox 215 (µ = 0.03204 Pa.s)Figur
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- Reliable exploitation tools, prim
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In addition, as a result of cyclic
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AcknowledgementThe part of this res
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Thepressure angle can be calculated
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mechanism these parameters are fina
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causes big changes of their propert
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Table 2. Impact toughness of some t
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Figure 1. Appearance of fractured f
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implementation of these new manugac
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additional energy is dissipated due
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The adopted geometry parameters are
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4. CONCLUSIONTools of virtual produ
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Figure 2. Structure of the machinin
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3. ANALYSIS OF RESULTSThe results o
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Figure 15. Surface roughness regard
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From the analysis of the diagram it
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comparison from economic, energy co
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Advantages and disadvantages of tra
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The information provided by footwea
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Force (N)5,554,543,532,521,510,50Ex
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additives, that had been, until rec
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Figure 1. Test results for samples
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Table 7. Test results of oil sample
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Input parameters- Current intensity
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edge formed into a thin line. At th
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Lower values of current are not res
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Table 1. Chemical composition of si
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flowable at high temperatures and v
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holes (pits) emerge in the shape of
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[4] W. Schatt, K-P. Wieters, Pulver
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assumption allows us to use, instea
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where P is the load, a - radius of
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determination (total running in tim
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μm, compared with Figure 17, wich
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Serbian TribologySocietySERBIIATRIB
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Especially when the chain transfer
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is obvious that this isa so-calledw
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winches. The authors are inclined t
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find parameters of robot laser hard
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each of which is measured by the le
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Fractal dimensions were determined
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Figure 3. Modified force acting sch
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0.25Lubricant: L3DC 04Friction coef
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nanocomposites. The influence of fi
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4. RESULTS AND DISCUSSION4.1 Morpho
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Figure 6. Loading and unloadin vers
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3 8 12 1 4 2 4
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The material after qualifying the r
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It has already been mentioned that
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Degradation & Stability, Vol. 69, N
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conformance to researchers’ requi
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This part is assembled of pneumatic
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matrixes describe the state of the
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values influence of themeasurement
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Figure 1. Friction stir weldinga -
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(t 2 t
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M fr / T [-] [-]10.90.80.70.60.50.4
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M fr / T [-]10.90.80.70.60.50.40.30
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experimentally determined that for
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4. DISCUSSIONAccording to the theor
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2.1 The life cycle of the reportThe
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Obviously the report is checked and
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uticaja na osnovu kompozita, a time
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5. ZAKLJUČCIStruktura tiksolivene
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dobijene različite karakteristike
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vizuelno, na dnevnoj svetlosti, pod
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LITERATURA[1] Зинченко В.
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Slika 1. Rotorni bager - glodar VII
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stvaraju sliku stanja i svoja zapa
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njihovih kotrljanih elemenata. Mere
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postupka i uticaja parametara depoz
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posledica različite raspodele mikr
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ZrO 2 Y 2 O 3 je takođe zbog oksid
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3.2 Pneumatska osetljivostOblast pr
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p mg (δ), koji je zbog malih struj
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PNEUMATIC PROBE HEAD SELECTION FOR
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1. Podsistem kopanja2. Podsistem pr
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Slika 3. Kriva habanjaNa tom dijagr
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Mjereni su parametri habanja i pril
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preše prevladavaju kombinirani uvj
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a) b)Slika 5. Karakteristična mikr
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varijantnih materijala u dostavnom
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Jovanović D. 414, 446KKaleicheva J
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CIP - Каталогизација
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