Description / Abstract:
The test procedure applies to roll coupled units such as
straight trucks, tractor semitrailers, full trailers, B-trains,
etc. The test is aimed at evaluating the level of lateral
acceleration required to rollover a vehicle or a roll-coupled unit
of a vehicle in a steady turning situation. Transient, vibratory,
or dynamic rollover situations are not simulated by this test.
Furthermore, the accuracy of the test decreases as the tilt angle
increases, although this is a small effect at the levels of tilt
angle used in testing heavy trucks. The test accuracy is accepted
for vehicles that will rollover at lateral acceleration levels
below 0.5 g corresponding to a tilt table angle of less than
approximately 27 degrees. Even so, the results for heavy trucks
with rollover thresholds greater than 0.5 g could be used for
comparing their relative static roll stability.
Purpose—The purpose of this SAE Recommended
Practice is to provide an interim test procedure for using tilt
tables to measure a static rollover threshold for heavy trucks.