Mean surface roughness

Brownian collision rate [m s ] shear collision rate [m s ] fast agglomeration rate [s ] slow agglomeration rate [s ] mean surface roughness [m] max surface roughness [m] surface roughness parameter maximum radius of curvature [m] minimum radius of curvature [m] substrate radius [m]... 

Ratio between the internal and external hub diameters Linear Correlation coefficient for linear regressions Ra,H Arithmetic mean surface roughness, considering the internal surface of the hub [pm]... 

Bg. 3. The theoretically predicted minimum film-thickness ( ) (Hamrock and Dovt on model [1,2]) and corresponding A ratio (O) where a is mean surface roughness, <7 — = 2 nm for PDMS... 

By equating Eqs. (6) and (8), and then using Eq. (7), the minimum film-thickness, can be obtained as a fimction of load or speed for each tribopair. The calculated results for the load-dependent and speed-dependent aqueous sliding of the tribopairs are presented in Figs. 2 and 3, respectively. In Fig. 3, the A ratio, defined as the ratio between the minimum film-thickness and the mean surface roughness, A=hmm/< ia is mean surface roughness. 

A Figure 12.35 Atomic force microscope image of thin diamond films deposited on silicon. The image is about 1 ju.m along each edge in the plane of the films. The polycrystalline nature of the film is evident. The mean surface roughness (mean distance between peaks and troughs) is on the order of 30 nm. 

A multileaf spring of the type schematized in Fig. 7.32 is subjected to load cycles variable from 700 to 160 kg. Leaves have a width I — SO mm and thickness s — 6 mm and are made of quenched and tempered steel that has been subjected to shot peening that has introduced a residual compression stress equal to about — 400 MPa and surface hardness of about 260 HB with a mean surface roughness of 2.0 pm. Verify leaf spring to fatigue. The most stressed section of each leaf is the... 

Components were lathe finished to a mean surface roughness of 1.5 microns. The hole drilled in the shaft was employed as a reference point for the ultrasonic signal, as explained later. The specimens were assembled by press fitting using a hydraulic... 

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