The friction coefficient for rough HDPE and geofoam surfaces is in the range of 1 at normal stresses of 25 kPa or less and reduces to about 0.8 at about 45 kPa.
(The friction coefficient for rough HDPE and geofoam surfaces; is; in the range of 1)
The friction coefficient for rough HDPE and geofoam surfaces
is
in the range of 1