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Title: 3D printing auxetic draft-angle structures towards tunable buckling complexity
Authors: Liu, Yuheng
Lei, Ming
Peng, Linlong
Lu, Haibao
Shu, Dong Wei
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Source: Liu, Y., Lei, M., Peng, L., Lu, H. & Shu, D. W. (2022). 3D printing auxetic draft-angle structures towards tunable buckling complexity. Smart Materials and Structures, 31(5), 055010-.
Journal: Smart Materials and Structures
Abstract: With the development of 3D printing technology, auxetic structures have attracted extensive attention due to their unusual mechanical properties. In this study, we design a 3D printed auxetic structure using 2D draft angles to achieve a tunable out-of-plane double hyperbolic buckling behavior by effectively continuously varying stiffness across thickness. The influences of radii and draft angles on the buckling behaviors of the 3D printed draft-angle auxetic structures are studied by finite element method. The constitutive relationships between stress, strain, radius, and draft angle have been formulated and discussed to identify the working principle behind the mechanical performance of draft-angle auxetic structures. Finally, the buckling behavior is modelled by a laminate structure, and the accuracy of these analytical results has then been verified by experiment. This study is expected to provide a design guideline for achieving tunable buckling behavior of auxetic structures via the novel stress mismatch of draft angles and thus continuously varying stiffness along the thickness direction. The current work constitutes an initial attempt to realize the tunability of the 3D out of plane deformation of 2D plane structures under in-plane compression.
ISSN: 0964-1726
DOI: 10.1088/1361-665X/ac5dde
Rights: © 2022 IOP Publishing Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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