United States Department of Transportation
i
Small Female/Older Occupant Thoracic Biofidelity Corridor Development
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2019-07-01
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[PDF-2.92 MB]
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Edition:Final Report
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Abstract:This report presents corridors for the biomechanical response of 10 female cadaver subjects, similar in mass and size to a 5th percentile female, in 30 km/h frontal sled tests performed under the gold standard test conditions. The corridors were based on tests conducted at UVA in 2013 (DTNH22-09-H-00247) and 2016 (DTNH2215D00022). The subjects were classified into healthy and unhealthy based on their bone mineral density with the unhealthy being the osteoporotic specimens with a T-score < -2.5 and the healthy being the osteopenic and normal specimens with a T-score > -2.5. The corridors generated from the test data fall under the following categories: 1. Chest deflection corridors relative to T8 coordinate system (based on Vicon data). 2. The displacement of anatomical centers of head, T1, T8, L2 and pelvis (based on Vicon data). 3. Transformed head and T1 acceleration and angular rate sensor data. 4. Belt load, and seat, knee bolster and foot plate load cell data time histories. BioRank metric was used to quantify the difference between the unhealthy and healthy corridors generated in this study. Most of the responses, i.e., kinematics, chest deflection and belt forces, showed a BioRank of less than 1 or close to 1 indicating that the difference in responses of the healthy and unhealthy subjects was less than the inherent variation in responses observed among the healthy test subjects. The data from healthy and un-healthy subjects were then combined to create ‘unified’ corridors for the signals that were not found to be significantly different between the healthy and unhealthy cohorts.
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Content Notes:Gold Standard Buck Condition 2.1: 2 kN Force Limited Belt, 30 km/h Frontal; Tests UVAS0209-UVAS0213 and UVAS0370-UVAS0374
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