Design and optimization of bioinspired auxetic structure for biomedical applications

Shirzad, M., Bodaghi, M. ORCID: 0000-0002-0707-944X, Oh, D., Yi, M. and Nam, S.Y., 2024. Design and optimization of bioinspired auxetic structure for biomedical applications. European Journal of Mechanics - A/Solids, 103: 105139. ISSN 0997-7538

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Auxetic metastructures are characterized by their unconventional deformation behavior and negative Poisson’s ratio (NPR), resulting in lateral expansion under tensile loads rather than normal contraction. They have attracted considerable attention for biomedical applications due to their high energy absorption and biofunctional benefits. Consequently, the present study aims to design and investigate a bioinspired auxetic structure that mimics human organ tissues, such as bone and tendon. The mechanical properties of the scaffolds were experimentally tested using a universal testing machine and verified using the finite element method (FEM) for both conventional auxetic and novel triangle auxetic structures. Furthermore, various gradient triangle auxetic structures are developed and analyzed using FEM to optimize their mechanical and physical properties. The results show that triangle auxetic structures increased Young’s modulus and yield strength by 28% and 27.5%, respectively, under compression load and by 35% and 40%, respectively, under tensile load. Moreover, by optimizing the gradient architecture while maintaining a similar porosity, these mechanical properties were further enhanced for both loading conditions.

Item Type: Journal article
Publication Title: European Journal of Mechanics - A/Solids
Creators: Shirzad, M., Bodaghi, M., Oh, D., Yi, M. and Nam, S.Y.
Publisher: Elsevier BV
Date: 2024
Volume: 103
ISSN: 0997-7538
Divisions: Schools > School of Science and Technology
Record created by: Laura Ward
Date Added: 11 Dec 2023 09:30
Last Modified: 11 Dec 2023 09:30

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