Ramos, H. orcid.org/0000-0001-9492-4092, Pickering, E., AlMahri, S. et al. (5 more authors) (2023) Experimental evaluation of hybrid lattice structures subjected to blast loading. Additive Manufacturing, 76. 103751. ISSN 2214-7810
Abstract
Lattice structures have shown potential for efficient protection against dynamic loading events, especially during high-strain rate scenarios such as a blast. Additive manufacturing enables the design of complex geometries to optimise lattice architecture and increase blast resistance. However, the lack of experimental data related to blast-resistant lattice structures poses challenges in developing and validating theoretical and numerical models. This study aims to design blast-resistant lattice structures that can improve protection efficiency at wider applicability in high-strain rate loadings. For that, hybrid-layered Triply Periodic Minimal Surfaces (TPMS) lattice structures were systematically designed using a Design of Experiments (DoE) approach and manufactured using additive manufacturing (AM). The Blast Hopkinson Pressure Bar (BHPB) rig was used to compare the influence of different lattice topologies and relative densities on energy absorption when specimens were subjected to compressive blast loading. High-speed imaging was utilised to measure transient deformation in addition to the load transferred through the specimens. The experimental results indicated that the BHPB rig could appropriately measure the energy absorption of compressive structures subjected to shockwave loading. Additionally, the results demonstrated that TPMS topology and relative density changes substantially affect its performance. The DoE approach was utilised to predict the performance improvements of layered-hybrid lattice structures, providing valuable data for blast protection specialists and engineers designing AM lattice structures to resist blast loading.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | Lattice structures; Blast resistance; Additive manufacturing; High strain-rate loading; Design of experiments |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 18 Oct 2023 16:03 |
Last Modified: | 18 Oct 2023 16:03 |
Status: | Published |
Publisher: | Elsevier BV |
Refereed: | Yes |
Identification Number: | 10.1016/j.addma.2023.103751 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:204377 |