Dynamic Kinematic Responses of Female Volunteers in Rear Impacts and Comparison to Previous Male Volunteer Tests
Artikel i vetenskaplig tidskrift, 2011

Objectives: The objective was to quantify dynamic responses of 50th percentile females in rear impacts and compare to those from similar tests with males. The results will serve as a basis for future work with models, criteria, and safety systems. Methods: A rear impact sled test series with 8 female volunteers was performed at velocity changes of 5 and 7 km/h. The following dynamic response corridors were generated for the head, T1 (first thoracic vertebra) and head relative to T1: (1) accelerations in posterior-anterior direction, (2) horizontal and vertical displacements, (3) angular displacements for 6 females close to the 50th percentile in size. Additionally, the head-to-head restraint distance and contact time and neck injury criterion (NIC) were extracted from the data set. These data were compared to results from previously performed male volunteer tests, representing the 50th percentile male, in equivalent test conditions. T-tests were performed with the statistical significance level of .05 to quantify the significance of the parameter value differences for the males and females. Results: At 7 km/h, the females showed 29 percent earlier head-to-head restraint contact time (p = .0072); 27 percent shorter horizontal rearward head displacement (p = .0017); 36 percent narrower head extension angle (p = .0281); and 52 percent lower NIC value (p = .0239) than the males in previous tests. This was mainly due to 35 percent shorter initial head-to-head restraint distance for the females (p = .0125). The peak head acceleration in the posterior-anterior direction was higher and occurred earlier for the females. Conclusions: The overall result indicated differences in the dynamic response for the female and male volunteers. The results could be used in developing and evaluating a mechanical and/or mathematical average-sized female dummy model for rear impact safety assessment. These models can be used as a tool in the design of protective systems and for further development and evaluation of injury criteria.

Crash testing

Volunteers

Sled testing

Whiplash

Rear impact

Författare

Anna K Carlsson

Chalmers, SAFER - Fordons- och Trafiksäkerhetscentrum

Chalmers, Tillämpad mekanik, Fordonssäkerhet

Johan Davidsson

Chalmers, SAFER - Fordons- och Trafiksäkerhetscentrum

Chalmers, Tillämpad mekanik, Fordonssäkerhet

Wolfram Hell

Sylvia Schick

Mats Svensson

Chalmers, SAFER - Fordons- och Trafiksäkerhetscentrum

Chalmers, Tillämpad mekanik, Fordonssäkerhet

Traffic Injury Prevention

1538-9588 (ISSN) 1538-957X (eISSN)

Vol. 12 347-357

Styrkeområden

Transport

Ämneskategorier

Övrig annan teknik

Farkostteknik

Fundament

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Innovation och entreprenörskap