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Biofidelity Evaluation of a Prototype Hybrid III 6 Year-Old ATD Lower Extremity

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Abstract

Incomplete instrumentation and a lack of biofidelity in the extremities of the 6 year-old anthropomorphic test device (ATD) pose challenges when studying regions of the body known to interact with the vehicle interior. This study sought to compare a prototype Hybrid III 6 year-old ATD leg (ATD-LE), with a more biofidelic ankle and tibia load cell, to previously collected child volunteer data and to the current Hybrid III 6 year-old ATD (HIII). Anthropometry, range of motion (ROM), and stiffness measurements were taken, along with a dynamic evaluation of the ATD-LE using knee-bolster airbag (KBA) test scenarios. Anthropometry values were similar in eight of twelve measurements. Total ankle ROM was improved in the ATD-LE with no bumper compared to the HIII. The highest tibia moments and tibia index values were recorded in KBA scenarios when the toes were positioned in contact with the dashboard prior to airbag deployment, forcing the ankle into axial loading and dorsiflexion. While improvements in the biofidelity of the ATD-LE are still necessary, the results of this study are encouraging. Continued advancement of the 6 year-old ATD ankle is necessary to provide a tool to directly study the behavior of the leg during a motor vehicle crash.

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Abbreviations

ATD:

Anthropomorphic test device

ATD-LE:

Abbreviation for the new prototype Hybrid III 6 year-old ATD leg being evaluated in this study

BPB:

Belt positioning booster

CRS:

Child restraint system

CVD:

Child volunteer data

DF:

Dorsiflexion

HIII:

The abbreviation used for the standard Hybrid III 6 year-old ATD which was used for comparison in this study

KBA:

Knee-bolster airbag

MVC:

Motor vehicle crash

PF:

Plantar flexion

ROM:

Range of motion

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Acknowledgments

The authors would like acknowledge Doug Longhitano (Honda R&D Americas) and staff for providing the facilities and support for the knee-bolster airbag testing. The authors would also like to thank Mike Carlson (Center for Automotive Research, The Ohio State University) who contributed to the final stiffness bumper design. Additionally, the authors would like to acknowledge the National Science Foundation (NSF) Center for Child Injury Prevention Studies at the Children’s Hospital of Philadelphia (CHOP) and the Ohio State University (OSU) for sponsoring this study and its Industry Advisory Board (IAB) members for their support, valuable input and advice. The views presented are those of the authors and not necessarily the views of CHOP, OSU, the NSF, or the IAB members. This research was supported by the Center for Child Injury Prevention Studies (CChIPS).

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Authors and Affiliations

  1. Injury Biomechanics Research Center, Division of Anatomy, The Ohio State University, 279 Hamilton Hall, 1645 Neil Avenue, Columbus, OH, 43210, USA

    Laura C. Boucher, Julie Bing & John H. Bolte IV

Authors
  1. Laura C. Boucher
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  2. Julie Bing
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  3. John H. Bolte IV
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Correspondence to Laura C. Boucher.

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Associate Editor Joel D. Stitzel oversaw the review of this article.

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Boucher, L.C., Bing, J. & Bolte, J.H. Biofidelity Evaluation of a Prototype Hybrid III 6 Year-Old ATD Lower Extremity. Ann Biomed Eng 44, 2794–2804 (2016). https://doi.org/10.1007/s10439-016-1562-1

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