Research Papers

Dynamic Testing of an SUV with Tire Tread Separation

Filename cmrsc19_3.pdf
Filesize 2 MB
Version 1
Date added June 7, 2009
Downloaded 3 times/fois
Category 2009–CMRSC-XIX–Saskatoon
Tags Session 1A
Author/Auteur Micky Gilbert, Douglas Yanda, Thomas Mueller

Abstract

There have been thousands of real-world rollover accidents involving Sport Utility Vehicles (SUVs) and light trucks that experience tire tread separation events prior to rollover. Reconstruction of these accidents show common forensic patterns and trends. Driver ability to maintain control of the vehicles is greatly diminished and under certain conditions can be uncontrollable even by a skilled professional. This work presents data and discussion from tread separation testing on an SUV. Back-to-back runs with fully separated-tread tires vs. non-separated-tread tires show clearly the reduced ability of the vehicle to grip pavement at the axle of the tire separation. Disabled tires were tested on both front and rear of the vehicle with simple one-steer J-turn type testing in repeated runs to examine the difference in yaw stability. The relationship between steering input vs. yaw stability is also examined. New information on the threshold of yaw stability is quantified in terms of peak steer angle and limit oversteer. An actual SUV rollover preceded by tread separation is also presented. Data from these tests will assist researchers in understanding the dynamics behind real-world accidents of this type.

Micky Gilbert, Douglas Yanda, Thomas Mueller