Paper Number 1.2
Validation
of Steady State Laboratory Lateral Force
Slip Characteristics of Small Tires
René van der Steen[1]
Ines Lopez
Henk Nijmeijer
Dynamics and Control, Department of Mechanical
Engineering
Voice: +31 (0)40 2474092
Fax: +31 (0)40 2461418
Email: R.v.d.Steen@tue.nl
Antoine Schmeitz
Bart de Bruijn
Vredestein Banden B.V.
It is advantageous to use small scale testing in the design phase of
tires due to the costs and uncontrollable environmental conditions of outdoor testing.
Therefore a laboratory abrasion and skid tester is used to obtain more insight
in the contact of a tread compound with the road for dry conditions.
In the experimental setup a small solid tire, with adjustable slip
angle, is pressed on an abrasive corundum disk. The present friction between
the abrasive disk and solid tire drives the tire and the resulting forces are
measured with a triaxial force sensor. Several experiments under different
normal loads, slip angles, and velocities of the disk are conducted.
To explain observed phenomena of lateral force measurements for a free
rolling tire under a number of slip angles a FE model is used. The relevant
parts of the setup are modeled in Abaqus and the steady state performance of
the small tire under different slip angles is evaluated. It is shown that the
present turnslip, which has great impact on the slip velocity field at the
trailing edge of the contact area, is captured well with the model. Furthermore
the calculated cornering stiffnesses are in good agreement with the
experiments.