Adams, Rhosslyn, Soe, Shwe and Theobald, Peter ![]() ![]() |
![]() |
PDF
- Published Version
Available under License Creative Commons Attribution. Download (6MB) |
Abstract
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.
Item Type: | Article |
---|---|
Date Type: | Published Online |
Status: | Published |
Schools: | Professional Services > Advanced Research Computing @ Cardiff (ARCCA) Schools > Engineering |
Additional Information: | License information from Publisher: LICENSE 1: URL: http://creativecommons.org/licenses/by/4.0, Type: cc-by |
Publisher: | IOP Publishing |
ISSN: | 0964-1726 |
Date of First Compliant Deposit: | 31 July 2023 |
Date of Acceptance: | 20 July 2023 |
Last Modified: | 12 Jun 2024 12:50 |
URI: | https://orca.cardiff.ac.uk/id/eprint/161351 |
Actions (repository staff only)
![]() |
Edit Item |