A Comparative Study on Asperity Peak Modeling Methods

Chinese Journal of Mechanical Engineering

Table 3 Comparison of [ξ] for surfaces with negative skewness (σ = 1, ϑ = − 2.3)

Skewness	Correlation length	Method	ξ_avg	σ	\(\overline{\kappa }\)	η
−0.25	0	Three-point definition	0.8281	0.9931	1.1637	0.3330
	0	Spectral moment approach	1.8214	0.6360	1.2382	0.2093
	50	Three-point definition	0.2639	1.0830	1.2095	0.1971
	50	Spectral moment approach	0.5281	1.0492	1.2715	0.1751
	100	Three-point definition	0.2477	1.0463	1.2027	0.1998
	100	Spectral moment approach	0.4235	1.1686	1.2940	0.1749
−0.5	0	Three-point definition	0.8268	0.9953	1.0846	0.3353
	0	Spectral moment approach	1.8412	0.6351	1.2884	0.2094
	50	Three-point definition	0.2151	1.0449	1.1001	0.2041
	50	Spectral moment approach	0.5093	1.0311	1.2142	0.1752
	100	Three-point definition	0.2102	1.0928	1.1747	0.1927
	100	Spectral moment approach	0.3691	1.0696	1.2243	0.1742