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Influence of the chest compression measurement method on assessment of restraint performance in side-impact crash scenarios

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1-s2.0-S0021929018303452-main.pdf (773.77 KB)

Date

2018-06-25

Authors

Gierczycka, Donata
Cronin, Duane S.

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Abstract

Side impact crashes contribute a significant number of fatal injuries (25% of road fatalities in the USA in 2016), with severe thoracic injuries diagnosed in 58% of front near-side impact occupants. Epidemiological data indicate that thoracic-only side airbags (tSABs) are not as effective as laboratory testing has suggested, and one of the reasons for this may be the use of surrogate-specific injury assessment methods, which are not directly transferable between Anthropometric Test Devices (ATDs) and Post-Mortem Human Surrogates (PMHSs). This study examines the effect of the thorax deformation measurement location and method on the predicted performance of seatbelts and tSABs in a side impact using a Human Body Model (HBM). The HBM was integrated in a vehicle and subjected to a Moving Deformable Barrier (MDB) impact at 61 km/h, with four restraint configurations: belted and unbelted, with and without a tSAB. Occupant response was assessed through chest band (CB) deformation, and as a change in distance between markers on the ribs. Multiple measurement locations in the HBM enabled direct comparison between the methods. The CB method indicated a 35% increase of chest compression due to tSAB; the rib-deflection (RD) method was not sensitive to the tSAB. The RD method predicted a 20% reduction of chest compression due to the seatbelt, but the CB-measured change was negligible. This study highlights the importance of measurement method on the response outcome and demonstrates that different outcomes may be predicted using a HBM for the same impact scenario, depending on the measurement method.

Description

The final publication is available at Elsevier via http://dx.doi.org/10.1016/j.jbiomech.2018.04.044 © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

Finite element method, Human body model, Injury biomechanics, Passive restraints, Side impacts

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Citation

URI

https://doi.org/10.1016/j.jbiomech.2018.04.044
 http://hdl.handle.net/10012/13440

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Waterloo Research
Mechanical and Mechatronics Engineering