Intrusion

Overview

Vehicle intrusion refers to the movement or deformation of specific areas of a vehicle during a crash, where parts of the vehicle may collapse or deform and intrude into the interior. This intrusion can pose a risk to occupants, compromise vehicle safety, and/or increase the likelihood of injury, depending on the severity of the intrusion. Intrusion is typically measured using x, y, and z coordinates to compare the pre-test and post-test positions of specific intrusion points (as shown in Figure 1) [1][2].

Inputs

• Pre-test and post test x, y, and z coordinates for the intrusion points

Calculations

1. Calculates the total distance each intrusion point traveled from the pre-test position to the post-test position
   • Calculates the resultant distance with the x, y, and z pre-test and post-test coordinates for each point
2. Generates 3d graph of intrusion points at the pre-test state and post-test state (as seen in Figure 2)
3. Generates bar chart with severity of the resultant intrusion values at 5 regions (as seen in Figure 3)

$$Total\,Distance\,Traveled\,(intrusion\,point) = \sqrt{[(x_{final}) - (x_{initial})]^2 + [(y_{final}) - (y_{initial})]^2 + [(z_{final}) - (z_{initial})]^2}$$

Intrusion Point Locations

Figure 1: Points used in intrusion measurement (orange dots) for driver's and passenger's side [1]

Generated charts

Figure 2: Intrusion points at pre-test (blue) and post-test(red) states

Figure 3: Severity of resultant instrusion values at specified locations

References

[1] J. Saunders and D. Parent. "Repeatability of a Small Overlap and an Oblique Moving Deformable Barrier Test Procedure," SAE International 1(2):2013, doi:10.4271/2013-01-0762

[2] "NHTSA Test Reference Guide, Version 5 - Volume 1: Vehicle Tests" National Highway Traffic Safety Administration, Revision - November 2014