Effective angle of internal friction ranged from 34° for sawdust to 42° for woodchips.
For the natural grain-size distributions, the coefficient of residual internal friction ranged from 0.61 to 0.63 and peak internal friction values ranged from 0.65 to 0.66.
Static coefficient of friction ranged from 0.44 – 0.45, 0.40 – 0.82, 0.40 – 0.70 and 0.37 – 0.67 for wood, mild steel, galvanized steel and glass respectively.
Hajdarwish and Shakoor (2006) report cohesion values between 0.24 and 7.84 MPa and angles of internal friction range between 10.9° and 35.8°.
Angles of internal friction range between 29° and 49° and between 41° and 47° for the Shimanto Belt and Boso samples, respectively.
The coefficient of friction ranged from a low value of 0.02 to a high of 1.7 while linear wear varied by a factor of over 60.
For two related die inserts, the sensitivity of these variables with respect to the level of friction ranging from no friction to no-slip, was studied in detail for the five holes.
The transformation error CoV of internal friction angle ranges between 1 and 33 %.
The internal friction angle ranges from 29.1 to 30.1°, while the cohesion (c') is very low.
