What I am getting at here is that predictions by the 4th power law using total axle loads alone is barely useful for comparing trucks as a rule of thumb. Just about any factor (contact area, axle spacing, pavement structural discontinuities, failure mode, temperature, etc.) that complicates the comparison of trucks with each other makes comparison of trucks with cars an exercise that should embarrass even politicians and reporters.
Tror du nesten må finne en studie som er gjort på personbiler
Damage functions were generally found
to be less than the fourth power, lying somewhere in the range of the second
or third power in most cases."
… fortsatt for lastebiler.
Higher tire pressure reduces the size of the tire “footprint” on the pavement,
so that the weight of the wheel is distributed over a smaller area. The
increased pressures hasten the wear of flexible pavements, increasing both the
rate of rutting and the rate of cracking. During highway operations, the rolling
of the tire results in a temperature rise that in turn causes the inflation
pressure to increase. Inflation pressures of hot tires can be 10 to 20 psi
greater than pressures of cold tires for bias-ply and 5 to 15 psi greater for
radials (Sharp 1987). Results from other studies (Southgate and Deen 1987;
Bonaquist et al. 1988a, 1988b) suggest that, for 20,000-pound single axles on
thicker pavements characteristic of major highways, an increase in tire
pressure from 75 to 100 psi increases pavement wear by about 15 percent.
Taken together, these results suggest that, other things being equal, pavement
wear effects of hot tires are 3 to 12 percent greater than pavement wear
effects of cold tires.
Så, større overflate på dekket som er i kontakt med bakken vil redusere slitasjen.