Specific wear rate, nominal point contact (three methods)
Archard specific wear rate for a point-contact (pin-on-disk) wear scar, computed three independent ways: from scar diameter+depth, from wear depth+pressure+velocity+time, or from mass loss+density.
Method 1 — scar diameter+depth
Worn volume (method 1), V20.106192982974676 mm³
Specific wear rate (method 1), k400.00001955566074 mm³/N·m
Method 2 — depth+pressure+velocity+time
Specific wear rate (method 2), k400 mm³/N·m
Method 3 — mass loss+density
Worn volume (method 3), V20.102564102564102 mm³
Specific wear rate (method 3), k399.92782527022723 mm³/N·m
Method & references
- Archard specific wear rate k = V / (F·s) from a pin-on-disk point-contact scar.
- Method 2 uses k = h / (p·v·t), following directly from the linear (Archard) wear-depth relation.
The computation is a literal port of the original client-side JavaScript from /calculators/c6_1.htm. Results are verified equal to the original by an automated golden-master test. No formula has been re-derived or “improved”.