Documentation:FIB book/problems/Rollover

From UBC Wiki

Even though rollover crashes are rare (less than 3% of all crashes), they are high death related that approximately one third occupant fatalities happened in rollover crashes. As the concern of the issue, vehicle’s static stability factor (SSF) was invented in order to determine the rollover resistance of the vehicle.

Question 1

Question 1.1

Calculate SSF for the following vehicles (Tesla Model S and JEEP Wrangler ) with given data and discuss the results.

Assignment answer.jpg

Question 1.2

List two types of rollovers and two types of measurement for the rollover rating.   

Question 2

Vehicle Kinematics in rollover involves deceleration along with a horizontal, vertical acceleration and deceleration, and rotational acceleration and deceleration. Following two images are from a 2006 JRS Dynamic Rollover Test with Anthropomorphic Test Dummy Hybrid III.

Figure 1. 2006 JRS Dynamic Rollover Test (before impact)
Figure 2. 2006 JRS Dynamic Rollover Test (after impact)

Question 2.1

Describe the three possible injuries that ATD can predict from the above rollover test. (at least three)

Question 2.2

Discuss the roof crush controversy in rollover base on the Malibu studies.

Question 2.3

Most of the Rollover tests are using ATD Hybrid III. Describe the limitation for the dummy testing.

References

  1. Roberts, C. W., Toczyski, J., & Kerrigan, J. R. (2019). Cervical spine injury in rollover crashes: Anthropometry, excursion, roof deformation, and ATD prediction. Clinical Biomechanics. https://doi.org/10.1016/j.clinbiomech.2018.04.004