Engineering Tribology 2E Episode 3 potx

... with convex surfaces in contact 286 6 ENGINEERING TRIBOLOGY This equation can be applied to any other problem in order to roughly estimate the relevance of tribology to a particular situation. ... economics of tribology are of such gigantic proportions that tribological programmes have been established by industry and governments in many countries throughout the world. XVIII ENGIN...

Ngày tải lên: 27/06/2014, 17:20

... 109 3, 200 425.4 32 13. 5 135 39 .6 540 112 3, 300 435 .3 33 13. 8 140 40.6 560 115 3, 400 445.2 34 14.1 145 41.8 580 118 3, 500 455.0 35 14.4 150 42.8 600 121 3, 600 464.7 36 14.7 155 43. 9 620 124 3, 700 ... 105 32 .8 460 99 .3 2,700 37 4.5 27 11.8 110 33 .9 470 101 2,800 38 4.9 28 12.2 115 35 .0 480 1 03 2,900 39 5.1 29 12.5 120 36 .2 490 104 3, 000 405 .3 30 12.8 1...

Ngày tải lên: 21/07/2014, 16:21

... publisher. Engineering Mechanics - Statics Chapter 9 Solution: V 2 3 π a 3 π 3 a 2 a−= π 3 a 3 = z c 1 V 5a 8 2 3 π a 3 ⎛ ⎜ ⎝ ⎞ ⎟ ⎠ 3 4 a π 3 a 3 ⎜ ⎝ ⎞ ⎟ ⎠ − ⎡ ⎢ ⎣ ⎤ ⎥ ⎦ = z c a 2 = Problem 9-7 6 Determine ... mm= b 60 mm= c 30 mm= d 30 mm= Solution: V 1 3 d 2 a d 2 b+ 2 3 d 3 += x c 1 V 1 3 d 2 a 3a 4 d 2 ba b 2 + + 2 3 d 3...

Ngày tải lên: 21/07/2014, 17:20

... interest in [g/cm 3 ]. 10 00 500 200 10 0 50 20 10 5 2 1 [ 10 Pa ] ì -9 -1 C 012 3 Viscosity [cP] 0 0.0 01 0.002 0.005 0. 01 0.02 0.05 0 .1 0.2 0.5 1 10243852 65 79 93 10 7 12 1 14 9 17 7 204 Viscosity [Pas] 0 Oil ... expression: = 1. 216 +4 .14 3ì(log 10 0 ) 3.0627 +2.848 10 4 ìb 5 .19 03 (log 10 0 ) 1. 5976 3.999ì (log 10 0 ) 3.0975 0 .11 62 (2 .12 ) where:...

Ngày tải lên: 13/08/2014, 16:21

... 3 2. 88 3 .2 3. 52 ISO VG 5 4.14 4.6 5.06 ISO VG 7 6. 12 6.8 7.48 ISO VG 10 9.00 10 11.0 ISO VG 15 13.5 15 16.5 ISO VG 22 19.8 22 24 .2 ISO VG 32 28.8 32 35 .2 ISO VG 46 41.4 46 50.6 ISO VG 68 61 .2 ... 74.8 ISO VG 100 90.0 100 110 ISO VG 150 135 150 165 ISO VG 22 0 198 22 0 24 2 ISO VG 320 28 8 320 3 52 ISO VG 460 414 460 506 ISO VG 680 6 12 680 748 ISO VG 1000 900 1000 110...

Ngày tải lên: 13/08/2014, 16:21

... w h dxdy (4. 13) LUBRICANTS AND THEIR COMPOSITION 79 T ABLE 3. 3 NLGI grease classification [28]. 000 445 - 475 00 400 - 430  0 35 5 - 38 5 1 31 0 - 34 0 2 265 - 295 3 220 - 250 4 ... Engrs., Vol. 182, Pt. 3A, 1967-1968, pp. 585- 5 93. 32 A.G. Papay, Oil-Soluble Friction Reducers, Theory and Application, Lubrication Engineering, Vol. 39 , 19 83, pp. 419-426...

Ngày tải lên: 13/08/2014, 16:21

... ratios. 0 0 1 0 .48 2 0.2 0 .46 6 0 .4 0 .45 3 0.6 0 .44 2 0.8 0 .43 1 1.0 0 .42 2 1.2 0 .41 4 1 .4 0 .40 6 1.6 0.399 1.8 0.393 2.0 0.387 2.2 0.381 2 .4 0.376 2.6 0.371 ... h 1 = h 0 (K + 1) (4. 44) Substituting into (4. 43) the constants ‘ h ’ and ‘C’ in terms of ‘K’ are: = 2h 0 (K + 1) h ¯ (K + 2) C = 1 h 0 (K + 2) (4. 45)...

Ngày tải lên: 13/08/2014, 16:21

... [N] 1. 757 5 ì10 4 -0.793 2.033 2 .59 6 1.042 0.884 -1 .51 0 - - 1.108 - 8 H [W] 2.79 15 10 3 -0 .57 9 1 .53 0 0.873 2 .50 0 1.642 -0.2 25 - - 9 1. 051 6ì 10 2 0.399 -1.040 1.372 -0 .53 9 -0. 458 0.7 65 - - 10 T max ... 10 1 37.8C 1.1 93.3C 2.46 L 2 .51 5 D 0 .56 3 N 0 .52 8 c 1.09 T S 0.383 () 1 2 1.3 85 or row 7: W = 1. 757 5 ì 10 4 37.8C 0.793 93.3C 2.033 L 2 .59 6 D 1.042 N 0....

Ngày tải lên: 13/08/2014, 16:21

... velocity [m/s]; 240 ENGINEERING TRIBOLOGY Computer Program for the Analysis of Grooved 360 ° Journal Bearings The example of a computer program ‘GROOVE’ for analysing of a grooved 360 ° journal bearing ... large. It can be seen from Figure 5.25 that for a 36 subtended groove angle and 0 .6 relative groove length, the dimensionless flow is about 6. 8. Assuming that the bearing entraini...

Ngày tải lên: 13/08/2014, 16:21

... on Numerical and Experimental Methods in Tribology, Sept. 1983, editors: D. Dowson, C.M. Taylor, M. Godet and D. Berthe, Butterworths, 1984, pp. 60 -70 . 258 ENGINEERING TRIBOLOGY In this chapter, the mechanism ... Wiley and Sons, 1980. 7 J.N. Shinkle and K.G. Hornung, Frictional Characteristics of Liquid Hydrostatic Journal Bearings, Transactions ASME, Journal of Basic Engineering,...

Ngày tải lên: 13/08/2014, 16:21

... 0.304p max = 0.304 ì 55.4 = 16 .8 [MPa] Ã Depth at which Maximum Shear Stress Occurs z = 0. 786 b = 0. 786 ì (5.75 ì 10 6 ) = 4.5 × 10 −6 [m] 334 ENGINEERING TRIBOLOGY · Flash Temperature in ... 1.3 380 2 ì 1.3 982 ì 50 ì 0.012 (2.3 08 ì 10 11 ) () 1/3 = 2.32 ì 10 4 [m]a = 6k 2 WR' E' () 1/3 = 1.73 ì 10 4 [m] b = 6WR' kE' () 1/3 = 6 ì 1.3 982 ì 50 ì 0.012...

Ngày tải lên: 13/08/2014, 16:21

... Institute for Technology and Mechanical Engineering, Moscow, 194 9. 2 H.M. Martin, Lubrication of Gear Teeth, Engineering, London, Vol. 102, 191 6, pp. 1 19- 121. 3 D. Dowson and G.R. Higginson, Elastohydrodynamic ... Journal of Lubrication Technology, Vol. 99 , 197 7, pp. 485-487. 13 F.T. Barwell, Bearing Systems, Principles and Practice, Oxford University Press, 197 9. 14 Engineering S...

Ngày tải lên: 13/08/2014, 16:21

... concentrations reaching 5% [49]. 0 50 100 150 10 100 100 0 10 4 10 5 10 6 Number of cycles to disruption Slip amplitude [àm] Vacuum evaporation Sputtering 100 V bias 200V bias Ion Plating FIGURE ... enriched with the additives dibenzyl 410 ENGINEERING TRIBOLOGY 128 C. Kajdas, Physics and Chemistry of Tribological Wear, Proceedings of the 10th International Tribology Co...

Ngày tải lên: 13/08/2014, 16:21

... Schmierstoff, Schmiertechnik, Vol. 11, 1964, pp. 271-280. 25 H.H. Krause, S.L. Cosgrave and C.M. Allen, Phthalocyanines as High Temperature Lubricants, Journal of Chemical Engineering Data, Vol. 6, 1961, pp. 112 -118 . 26 ... technology has extended the control of wear to many previously unprotected engineering components. 436 ENGINEERING TRIBOLOGY · Laser Surface Hardening and All...

Ngày tải lên: 13/08/2014, 16:21

... hardenability steel used for large sections 430 BT1$ MI0 430 0.85 0 .30 0.25 4.0 2.0 8.0 BMl 450 0.80 0 .30 0 .30 4.0 1.50 1.0 8.0 450 0. 83 0 .30 0 .30 3. 85 6.15 1.90 5.0 A21 COMPOSTION AND ... changed from (1). Flow Q* = 0.12 dm3/s, therefore actual flow rate Q = 4~0.12 - = 0.25 dm3/s, (::I3 cf. 1 .3 dm3/s for arrangement (1). Al9 .3 Selection o...

Ngày tải lên: 13/08/2014, 17:20