2021
DOI: 10.1093/milmed/usab374
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Head Impact Modeling to Support a Rotational Combat Helmet Drop Test

Abstract: Introduction The Advanced Combat Helmet (ACH) military specification (mil-spec) provides blunt impact acceleration criteria that must be met before use by the U.S. warfighter. The specification, which requires a helmeted magnesium Department of Transportation (DOT) headform to be dropped onto a steel hemispherical target, results in a translational headform impact response. Relative to translations, rotations of the head generate higher brain tissue strains. Excessive strain has been implicat… Show more

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Cited by 8 publications
(9 citation statements)
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“…The time-accumulated peaks of and were determined and labelled as and , respectively. Scheme 2 has been previously used to extract the principal strain rate and/or the tract-oriented strain rates in the brain [23, 25, 26, 41-44] and other biological tissues (e.g., leg muscles [45-48], tongue [49, 50], myocardium [51-53]).…”
Section: Methodsmentioning
confidence: 99%
“…The time-accumulated peaks of and were determined and labelled as and , respectively. Scheme 2 has been previously used to extract the principal strain rate and/or the tract-oriented strain rates in the brain [23, 25, 26, 41-44] and other biological tissues (e.g., leg muscles [45-48], tongue [49, 50], myocardium [51-53]).…”
Section: Methodsmentioning
confidence: 99%
“…Prior work has highlighted the blunt impact standard limitation to linear head acceleration [ 25 ], with the need to focus on rotational head motion, the likely mechanism contributing to diffuse axonal injury (DAI) [ 25 28 ]. Military specification (mil-spec) requires a blunt impact acceleration limit testing for pass/fail criteria of the ACH, but does not require rotational component testing [ 27 ]. Blast-induced TBI (BTBI) is also a mechanism of combat-induced diffuse axonal injury where blast waves cause rotational forces on the brain to induce DAI.…”
Section: Current Military Helmet Designmentioning
confidence: 99%
“…24 Prior work has highlighted the blunt impact standard limitation to linear head acceleration, 25 with the need to focus on rotational head motion, the likely mechanism contributing to diffuse axonal injury (DAI). [25][26][27][28] Military-specification (mil-spec) requires a blunt impact acceleration limit testing for pass/fail criteria of the ACH, but does not require a rotational component testing. 27 Blast induced TBI (BTBI) is also a mechanism of combat induced diffuse axonal injury where blast waves cause rotational forces on the brain to induce DAI.…”
Section: Current Military Helmet Designmentioning
confidence: 99%
“…[25][26][27][28] Military-specification (mil-spec) requires a blunt impact acceleration limit testing for pass/fail criteria of the ACH, but does not require a rotational component testing. 27 Blast induced TBI (BTBI) is also a mechanism of combat induced diffuse axonal injury where blast waves cause rotational forces on the brain to induce DAI.…”
Section: Current Military Helmet Designmentioning
confidence: 99%
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