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In-plane energy absorption characteristics of a modified re-entrant auxetic structure fabricated via 3D printing

Choudhry, N. K., Panda, B. and Kumar, S. (2022) In-plane energy absorption characteristics of a modified re-entrant auxetic structure fabricated via 3D printing. Composites Part B: Engineering, 228, 109437. (doi: 10.1016/j.compositesb.2021.109437)

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Abstract

Here, we present the in-plane energy absorption characteristics of modified re-entrant auxetic honeycombs realized via fused filament fabrication in conjunction with parametric analysis and geometry optimization. The influence and interaction effects of the geometrical parameters such as strut-length ratio and joint-angles on the stiffness, strength and energy absorption characteristics of modified re-entrant auxetic honeycombs were evaluated. Subsequently, Finite Element results obtained using ABAQUS/Explicit were corroborated with measured data. Deformation mode, stress-strain response and energy absorption behavior of an optimal re-entrant auxetic honeycomb were studied and compared with conventional re-entrant auxetic structure. Our modified auxetic structure reveals an 36% improvement in the specific energy absorption capacity. Our analysis indicates that due to the introduction of more nodes with low rotational stiffness, the failure strain of the modified re-entrant structure has increased resulting in improved energy absorption capacity.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Kumar, Professor Shanmugam
Creator Roles:
Kumar, S.Writing – review and editing
Authors: Choudhry, N. K., Panda, B., and Kumar, S.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Composites Part B: Engineering
Publisher:Elsevier
ISSN:1359-8368
ISSN (Online):1879-1069
Published Online:29 October 2021
Copyright Holders:Copyright © 2021 Elsevier Ltd.
First Published:First published in Composites Part B: Engineering 228: 109437
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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