The biomechanical differences of shock absorption test methods in the US and European helmet standards

Meng, Shiyang; Cernicchi, Alessandro; Kleiven, Svein; Halldin, Peter

doi:10.1080/13588265.2018.1464545

Cited by 11 publications

(2 citation statements)

References 32 publications

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“…The lateral impact tends to yield large peak values, while the front, crown and rear impacts have small ones. The similar phenomenon is also observed in the impact of the helmeted headform onto the anvil [71]. The reason may be that the stiffer foam at the lateral position results in the relatively small energy absorbed by the foam liners under the lateral impact But the internal energy of the shell is much smaller than that of the foam liners after 7 ms.…”

Section: Effect Of Helmet Impact Positionsupporting

confidence: 68%

Modeling the mechanical behavior of a helmeted headform impacted with a laminated windshield with consideration of composite failure

Gao

Wang²,

He³

et al. 2022

Composite Structures

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Section: Effect Of Helmet Impact Positionsupporting

confidence: 68%

Modeling the mechanical behavior of a helmeted headform impacted with a laminated windshield with consideration of composite failure

Gao

Wang²,

He³

et al. 2022

Composite Structures

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“…As such, the PBC model better represents the guided fall loading conditions of the American standards (e.g. ASTM) which include a rigid neck that restrains motion rather than the free fall conditions of the British and European standards [55,70]. Secondly, the PBC model fails to account for the curvature of the headform and shell, instead adopting for a flat-on-flat impact.…”

Section: Discussionmentioning

confidence: 99%

Optimisation of an elastomeric pre-buckled honeycomb helmet liner for advanced impact mitigation

Adams

Soe

Theobald

2023

Smart Mater. Struct.

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Advances in computational modelling now offer an efficient route to developing novel helmet liners that could exceed contemporary materials' performance. Furthermore, the rise of accessible additive manufacturing presents a viable route to achieving otherwise unobtainable material structures. This study leverages an established finite element-based approach to the optimisation of cellular structures for the loading conditions of a typical helmet impact. A novel elastomeric pre-buckled honeycomb structure is adopted and optimised, the performance of which is baselined relative to vinyl nitrile foam under direct and oblique loading conditions. Results demonstrate that a simplified optimisation strategy is scalable to represent the behaviour of a full helmet. Under oblique impact conditions, the optimised pre-buckled honeycomb liner exceeds the contemporary material performance when considering computed kinematic metrics head and rotational injury criterion, by up to 49.9% and 56.6%. Furthermore, when considering tissue-based severity metrics via finite element simulations of a human brain model, maximum principal strain and cumulative strain density measures are reduced by 14.9% and 66.7% when comparing the new material, to baseline.

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Surface Contact Features, Impact Obliquity, and Preimpact Rotational Motion in Concussive Helmet-to-Ground Impacts: Assessment via a New Impact Test Device

Kent

Forman

Bailey³

et al. 2020

Ann Biomed Eng

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The biomechanical differences of shock absorption test methods in the US and European helmet standards

Cited by 11 publications

References 32 publications

Modeling the mechanical behavior of a helmeted headform impacted with a laminated windshield with consideration of composite failure

Modeling the mechanical behavior of a helmeted headform impacted with a laminated windshield with consideration of composite failure

Optimisation of an elastomeric pre-buckled honeycomb helmet liner for advanced impact mitigation

Surface Contact Features, Impact Obliquity, and Preimpact Rotational Motion in Concussive Helmet-to-Ground Impacts: Assessment via a New Impact Test Device

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