Fig. 1 Sintering process flow of copper/graphite composite material More

Fig. 2 Schematic diagram of electrical contact friction and wear tester: (1) motor, (2) brass disc, (3) nylon disc, (4) disc holder, (5) DC power supply, (6) rolling bearing, (7) pin holder, (8) acceleration sensor, (9) terminal block, and (10) copper sheet More

Fig. 3 Wear surface topography of composites CG15 and pure copper under various currents: ( a 1) and ( b 1) 2 A, ( a 2) and ( b 2) 4 A, ( a 3) and ( b 3) 6 A, ( a 4) and ( b 4) 8 A More

Fig. 4 Wear surface roughness of composites CG15 and pure copper under different electric currents More

Fig. 5 Wear surface topography of composite material and pure copper under the electric current of 2 A: ( a ) CG30, ( b ) CG25, ( c ) CG20, ( d ) CG15, and ( e ) pure copper More

Fig. 6 Wear surface roughness of pin sample under the electric current of 2 A and 8 A More

Fig. 7 Wear surface topography of five materials under the electric current of 8 A: ( a ) CG30, ( b ) CG25, ( c ) CG20, ( d ) CG15, and ( e ) pure copper More

Fig. 8 Friction vibration signals and their probability distribution of CG15 under different electric currents: ( a ) 2 A, ( b ) 4 A, ( c ) 6 A, and ( d ) 8 A More

Fig. 9 Probability of vibration amplitude, which is less than 0.5 mm/s 2 of two materials under different currents: ( a ) CG15 and ( b ) pure copper More

Fig. 10 Friction vibration signals and their probability distribution of five composites under different electric currents: ( a ) CG30, ( b ) CG25, ( c ) CG20, ( d ) CG15, and ( e ) pure copper More

Fig. 11 Probability of vibration amplitude, which is less than 0.5 mm/s 2 of five materials under different currents: ( a ) 2 A and ( b ) 8 A More

Fig. 12 Wear surface topography of CG30 under various electric currents: ( a ) 2 A, ( b ) 4 A, ( c ) 6 A, and ( d ) 8 A More

Fig. 1 Comparison of the density–pressure response of ASME 55 lubricant with the universal equation of state by Dowson and Higginson More

Fig. 2 ( a ) Equivalent/reduced geometry of a line contact and ( b ) its corresponding computational domain More

Fig. 3 Finite element transient EHL model: ( a ) employed mesh and ( b ) flowchart of general numerical procedure More

Fig. 4 Single degree-of-freedom dynamic model of EHL line contact More

Fig. 5 Force–displacement curves of a spring (left), dashpot (center), and parallel spring-dashpot system (right), assuming linear behavior for all More

Fig. 6 Typical fluid film response subject to an oscillatory external applied loading with F 0 = 1.0 MN/m, u m = 1.0 m/s, A / F 0 = 10%, and ω /2π = 1.0 Hz, over the six covered loading cycles: ( a ) central film thickness variations with time and ( b ) hysteresis loop More