Mechanical behaviour of additively manufactured elastomeric pre-buckled honeycombs under quasi-static and impact loading

Adams, Rhosslyn, Townsend, Scott, Soe, Shwe and Theobald, Peter ORCID: https://orcid.org/0000-0002-3227-7130 2022. Mechanical behaviour of additively manufactured elastomeric pre-buckled honeycombs under quasi-static and impact loading. Materials & Design 213 , 110368. 10.1016/j.matdes.2021.110368

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Abstract

Selective laser sintering has been used to manufacture different structural variations of a pre-buckled circular honeycomb. The mechanical behaviour of these structures has been examined under both quasi-static and dynamic impact loading. Pre-buckled circular honeycombs with aspect ratios e = 0.8 and e = 0.6 were compared to a traditional, straight-walled honeycomb. It has been found that the mechanical behaviour of the honeycomb can be tailored to yield different mechanical responses. Principally, decreasing the aspect ratio reduced the stress at yield, as well as the total energy absorbed until densification, however, this alleviated the characteristic stress-softening response of traditional honeycombs under static and dynamic conditions. When subjected to multiple cycles of loading, a stabilised response was observed. The numerical response closely agreed with the experimental results. A simplified, periodic boundary condition model also closely agreed with the experimental results whilst alleviating computational run time by nominally 75%. The numerical full factorial parameter design sweep identified a broad range of mechanical behaviour. This represents a valuable tool to identify optimal design configurations for future impact mitigating applications.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Additional Information:	This is an open access article under the CC BY licence. (http://creativecommons.org/licenses/by/4.0/)
Publisher:	Elsevier
ISSN:	0264-1275
Date of First Compliant Deposit:	10 January 2022
Date of Acceptance:	27 December 2021
Last Modified:	24 May 2023 00:35
URI:	https://orca.cardiff.ac.uk/id/eprint/146450

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