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Investigating the dynamic compression response of elastomeric, additively manufactured fluid-filled structures via experimental and finite element analyses

Soe, Shwe; Adams, Rhosslyn; Hossain, Mokarram; Theobald, Peter

Investigating the dynamic compression response of elastomeric, additively manufactured fluid-filled structures via experimental and finite element analyses Thumbnail


Authors

Profile image of Shwe Soe

Dr Shwe Soe Shwe.Soe@uwe.ac.uk
Associate Professor in Digital Manufacturing

Rhosslyn Adams

Mokarram Hossain

Peter Theobald



Abstract

This study evaluates a fluid-filled, closed-cell lattice as a novel route to reducing peak acceleration in impact environments. A conical structure was designed and built using fused filament fabrication. One structure was manufactured hollow (100% air), another 70% filled with water (50% by height) and a third 100% water-filled. Peak acceleration was evaluated by performing 4.1 kg impacts at 1, 2, 3 m/s. Impacts were then simulated in shell and solid finite element analysis models, employing the smooth particle hydrodynamic method for the water and a surface-based fluid-filled cavity method for air. The air-filled, conventional closed-cell structures achieved the lowest peak accelerations at lower impact energies, however, water infill improved impact performance at higher energies. For low to medium impact energies, shell and solid modelling accurately simulated experimental trends, although the latter is more computationally expensive. Solid modelling is the only viable solution for scenarios achieving structural densification, due to the inaccuracies in shell-based models caused by the inter-surface penetrations. This work has demonstrated that fluid-filled structures provide a promising approach to reduce acceleration and so achieving enhanced protection, whilst also presenting a computational pathway that will enable efficient design of new and novel structures.

Journal Article Type Article
Acceptance Date Feb 1, 2021
Online Publication Date Feb 4, 2021
Publication Date Mar 1, 2021
Deposit Date Feb 10, 2021
Publicly Available Date Feb 19, 2021
Journal Additive Manufacturing
Print ISSN 2214-7810
Electronic ISSN 2214-8604
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 39
Pages 101885
DOI https://doi.org/10.1016/j.addma.2021.101885
Keywords Fluid-filled structure, Additive manufacturing, Dynamic compression, Smooth particle hydrodynamic, Visco-hyperelastic constitutive model
Public URL https://uwe-repository.worktribe.com/output/7079189
Publisher URL https://doi.org/10.1016/j.addma.2021.101885
Additional Information This article is maintained by: Elsevier; Article Title: Investigating the dynamic compression response of elastomeric, additively manufactured fluid-filled structures via experimental and finite element analyses; Journal Title: Additive Manufacturing; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.addma.2021.101885; Content Type: article; Copyright: © 2021 The Authors. Published by Elsevier B.V.

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