Sharing knowledge is so valuable. Together with UPPAbaby and the University of Pennsylvania, we've conducted a study that we've presented at the 17th International Conference on Child Car Safety in Munich. For those who couldn't attend, we'd like to share a summary of our study.

The impact of vertical pitch on ATD injury metrics using virtual simulations

Besselink, D. (Sp); Gaudreau, P.; Maltese, M. R.: Impact of vertical pitch in frontal crashes on ATD injury metrics. Protection of Children in Cars, 17th International Conference TÜV SÜD, 2019, München, Germany, Dec. 2019.

In a 2018 study by Children’s Hospital of Philadelphia (CHOP), the vertical pitch motion of vehicles during full-frontal crash tests was investigated. The goal of the follow-up study was to quantify the impact of this vertical pitch motion on the loading of a child seated in the second seating row of a vehicle.

Using virtual simulation models of a convertible US car seat (the UPPAbaby KNOX) on the FMVSS No. 213 test sled with and without top tether install and crash test pulses of 17 different vehicles, we elucidated the impact of the vertical pitch on the ATD injury metrics.

The results show that by adding the vertical pitch accelerations, the loading of the ATD increased on average. For the analyzed vehicle set, the average loading of the ATD’s chest, without and with top tether, increases by 13% and 10%, of the ATD’s head by 13% and 18% and of the ATD’s neck by 1% and 3.5% respectively.

Since the characteristics of the vertical pitch acceleration strongly differ per vehicle, the impact of including the vertical pitch on the loading of the ATD also differs significantly per simulation, leading to a larger spread in results.

Characteristics of vertical pitch motions have been identified which lead to a severe increase of the loading of the ATD by more than 30%. The results of this study can be used in the puzzle to develop solutions on how to incorporate real-world vehicle crash motions into (a) the future CRS design, (b) the future CRS regulation and homologation and potentially (c) the future vehicle designs.

This is just a summary of the full scientific article. Would you like to know more about this topic or would you like to discuss a CRS project? Contact us.


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