Eventos Anais de eventos
MECSOL 2019
7th International Symposium on Solid Mechanics
Exploring the performance of an additively manufactured viscoelastic metamaterial for use as a helmet liner
Submission Author:
Rhosslyn Adams , South Glamorgan , United Kingdom
Co-Authors:
Rhosslyn Adams, Shwe Soe, Peter Theobald
Presenter: Rafael Santiago
doi://10.26678/ABCM.MECSOL2019.MSL19-0094
Abstract
Existing head impact protection solutions exhibit a very narrow performance window, offering effective protection only at relatively high impact energies. This study explores whether additive manufacturing can be used to design a new family of materials and, thus, achieve a more effective solution. The ‘Miura-ori’ stacked folding origami pattern has inspired a series of metamaterial structures that have been highlighted for exemplar performance against contemporary energy-absorbing systems. This work develops on our previous success by leveraging the established impact attenuating ability of viscoelastic rubber-like materials, achieved through ink jet additive manufacturing. To this end, as-printed material properties were compared to supplier data for 3 co-polymers, whilst Miura-Ori structures were quasistatically compressed and impacted, at increasing velocities. Comparison was drawn against the current state of the art, Vinyl Nitrile, as well as our previous design iteration manufactured using Selective Laser Sintering. Results indicated that a viscoelastic Miura-ori structure achieved improved absorption of peak linear acceleration, versus Vinyl Nitrile.process.
Keywords
Viscoelastic, Additive manufacturing, Impact, head protection, helmet
