Area Roughness Parameters

Description of surface texture parameters in ISO 25178

Height
Spatial
Hybrid
Functional
Functional volume
Feature

Sv(马克西mum pit height)

Vmc (Core material volume)

Spc (Arithmetic mean peak curvature)

Spc (arithmetic mean peak curvature) represents the arithmetic mean of the principal curvature of the peaks on the surface. A smaller value indicates that the points of contact with other objects have rounded shapes; a larger value indicates that the points of contact with other objects have pointed shapes.

Spc (Arithmetic mean peak curvature)

Find from the parameter list

Height	Sa (arithmetical mean height)
	Sz (Maximum height)
	Sq (Root mean square height)
	Ssk (Skewness)
	Sku (Kurtosis)
	Sp (Maximum peak height)
	Sv(马克西mum pit height)
Spatial	Sal (Auto-correlation length) / Str (Texture aspect ratio)
Spatial	Std* (Texture direction)
Hybrid	Sdq (Root mean square gradient)
Hybrid	Sdr (Developed interfacial area ratio)
Functional	Smr(c) Areal material (bearing area) ratio
	Smc(mr) Inverse areal material ratio
	Sk(Core height)
	Spk (Reduced peak height)
	Svk (reduced dale height (reduced valley depth))
	Smr (Peak material portion)
	Smr2 (Valley material portion)
	Sxp (Peak extreme height)
Functional volume	Vvv (Dale void volume)
	Vvc (Core void volume)
	Vmp (Peak material volume)
	Vmc (Core material volume)
Feature	Spd (Density of peaks)
	Spc (Arithmetic mean peak curvature)
	S10z / S5p / S5v / Sda(c) / Sha(c) / Sdv(c) / Shv(c)

"What is area roughness?" page list

Other Pages