Browse Publications Technical Papers 2002-01-1305

Re-Analysis of the RICSAC Car Crash Accelerometer Data 2002-01-1305

Data from the RICSAC1 car crashes have been presented and analyzed in the original reports and in technical papers by others. Some issues dealt primarily with respect to the transformation of data from the accelerometer locations to the centers of gravity. Accelerometers were attached to the moving vehicles and so most results have been presented in moving coordinates. It appears that an additional step to transform the velocity changes and final velocities into inertial coordinates remains to be done. The initial and final inertial velocities and vehicle physical properties are used to compare the experimental data to the law of conservation of momentum. Some of the collisions lead to a loss in total system momentum, as expected. Some show a gain in system momentum which is not physically possible. An analysis of variance of this momentum data shows that the loss or gain of momentum is not systematically related to the type of collision. Consequently, it can be concluded that the variations in the change of system momentum are random and due to factors that were not under control in the experimental collisions. The data indicate that the observed changes in system momentum of the 4 RICSAC impact configurations are not significantly different. Finally, the experimentally measured linear and angular velocity changes, ΔV and ΔΩ, of the vehicles and total energy loss of each collision are compared to theoretical values calculated using planar impact mechanics. These comparisons show that the theoretical energy losses tend to be lower than the experimental values whereas some of the theoretical ΔV and ΔΩ values are lower and some are higher, with no discernable systematic trend.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Validation and Application of a Methodology to Calculate Head Accelerations and Neck Loading in Soccer Ball Impacts


View Details


Comparison of Reponses of the Flex-PLI and TRL Legform Impactors in Pedestrian Tests


View Details


Delta-V Analysis from Crash Test Data for Vehicles with Post-Impact Yaw Motion


View Details