Development and validation of a thorax surrogate FE model for assessment of trauma due to high speed blunt impacts

Thota, Narasimha and Epaarachchi, Jayantha and Lau, Kin-Tak (2014) Development and validation of a thorax surrogate FE model for assessment of trauma due to high speed blunt impacts. Journal of Biomechanical Science and Engineering, 9 (1). 08-1. ISSN 1880-9863

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Abstract

Without being able to evaluate blunt thoracic trauma in terms of an acceptable injury criterion, it is not possible
to develop or validate non-lethal projectiles, bullet proof vests and chest protectors for sports personnel etc.
In order for the assessment of the blunt trauma caused by high speed projectiles, a novel design of a
mechanical surrogate of the thorax (Mechanical THOrax for Trauma Assessment: MTHOTA) was conceptualized. An iterative impact analyses in the virtual testing environment were carried out by impacting the finite element model of the mechanical thorax with 37 mm diameter, 100 mm long wooden baton weighing 140 grams (20 m/s and 40 m/s impact speeds) and 37 mm diameter, 28.5 mm long wooden baton weighing 30
grams with 60 m/s impact speed. From the output of every simulation, force dynamic response (force-time), deflection dynamic response (deflection-time) and force-deflection response were elicited and compared with the corresponding human response corridors developed by Wayne State University’s researchers. By suitably changing the design parameters of the mechanical surrogate, simulation iterations were continued till the responses were correlated with the human response corridors. Values of viscous criterion (VCmax), product of
maximum chest deflection and the rate at which chest deforms, obtained from MTHOTA were in very good agreement with those obtained from the cadaveric test data. The methodology, concept and validation of the
MTHOTA have been presented in this paper.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version made available according to copyright transfer form for authors. Copyright: Japan Society of Mechanical Engineers A license for reproduction and distribution of this paper will be granted to the Author by the JSME provided a copyright notice is included in each copy.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 24 Sep 2014 10:33
Last Modified: 18 Dec 2017 06:45
Uncontrolled Keywords: blunt thoracic trauma, surrogate, viscous injury, sports injury, viscous criterion, chest protective equipment, less-lethal ammunition, MTHOTA, 3-RCS
Fields of Research : 09 Engineering > 0903 Biomedical Engineering > 090302 Biomechanical Engineering
09 Engineering > 0915 Interdisciplinary Engineering > 091599 Interdisciplinary Engineering not elsewhere classified
Socio-Economic Objective: A Defence > 81 Defence > 8101 Defence > 810102 Army
A Defence > 81 Defence > 8101 Defence > 810104 Emerging Defence Technologies
Identification Number or DOI: 10.1299/jbse.2014jbse0008
URI: http://eprints.usq.edu.au/id/eprint/25258

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