Three-dimensional double negative mechanical metamaterials with tailored anisotropy
Mechanical metamaterials, developed artificially, possess remarkable properties, though these often conflict and are difficult to balance. Previous research on double-negative (negative stiffness and negative Poisson's ratio) metamaterials has been limited to two-dimensional structures or compl...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2025-12-01
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| Series: | Virtual and Physical Prototyping |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/17452759.2025.2500669 |
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| author | Wenkai Liu Fenglei Li Yong Liang Eric Li Dahua Shou Bing Li |
| author_facet | Wenkai Liu Fenglei Li Yong Liang Eric Li Dahua Shou Bing Li |
| author_sort | Wenkai Liu |
| collection | DOAJ |
| description | Mechanical metamaterials, developed artificially, possess remarkable properties, though these often conflict and are difficult to balance. Previous research on double-negative (negative stiffness and negative Poisson's ratio) metamaterials has been limited to two-dimensional structures or complex fabrication methods, restricting their functionality and applications. To overcome these challenges, we propose a three-dimensional double-negative mechanical metamaterial design, comprising negative stiffness cells and frameworks. This design employs cube arrangements, rotation angles, selective connections, and guide rod assemblies to create 3D structures that maintain localised negative stiffness. The overall negative Poisson's ratio is achieved through coercive deformation between frameworks. Specimens are rapidly fabricated through one-time 3D printing and facile assembly. Based on this strategy, a series of 3D orthotropic isotropic and anisotropic metamaterials are proposed, which have a large tunable design space including parameters such as compressive force, Poisson's ratio and anisotropy. In addition, these metamaterials exhibit high elasticity and mechanical hysteresis during cyclic loading and unloading. These properties were verified by simulations and experiments. These metamaterials have potential applications in helmets, crash beams, landing gears, and other orientation-dependent protection systems. |
| format | Article |
| id | doaj-art-ff3d34ec3931421984e39f9d36f7b920 |
| institution | Kabale University |
| issn | 1745-2759 1745-2767 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Virtual and Physical Prototyping |
| spelling | doaj-art-ff3d34ec3931421984e39f9d36f7b9202025-08-20T03:53:46ZengTaylor & Francis GroupVirtual and Physical Prototyping1745-27591745-27672025-12-0120110.1080/17452759.2025.2500669Three-dimensional double negative mechanical metamaterials with tailored anisotropyWenkai Liu0Fenglei Li1Yong Liang2Eric Li3Dahua Shou4Bing Li5School of Aeronautics, Northwestern Polytechnical University, Xi’an, People’s Republic of ChinaSchool of Aeronautics, Northwestern Polytechnical University, Xi’an, People’s Republic of ChinaState Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an, People’s Republic of ChinaSchool of Computing, Engineering & Digital Technologies, Teesside University, Middlesbrough, UKFuture Intelligent Wear Centre, The Hong Kong Polytechnic University, Hong Kong, People’s Republic of ChinaSchool of Aeronautics, Northwestern Polytechnical University, Xi’an, People’s Republic of ChinaMechanical metamaterials, developed artificially, possess remarkable properties, though these often conflict and are difficult to balance. Previous research on double-negative (negative stiffness and negative Poisson's ratio) metamaterials has been limited to two-dimensional structures or complex fabrication methods, restricting their functionality and applications. To overcome these challenges, we propose a three-dimensional double-negative mechanical metamaterial design, comprising negative stiffness cells and frameworks. This design employs cube arrangements, rotation angles, selective connections, and guide rod assemblies to create 3D structures that maintain localised negative stiffness. The overall negative Poisson's ratio is achieved through coercive deformation between frameworks. Specimens are rapidly fabricated through one-time 3D printing and facile assembly. Based on this strategy, a series of 3D orthotropic isotropic and anisotropic metamaterials are proposed, which have a large tunable design space including parameters such as compressive force, Poisson's ratio and anisotropy. In addition, these metamaterials exhibit high elasticity and mechanical hysteresis during cyclic loading and unloading. These properties were verified by simulations and experiments. These metamaterials have potential applications in helmets, crash beams, landing gears, and other orientation-dependent protection systems.https://www.tandfonline.com/doi/10.1080/17452759.2025.25006693D mechanical metamaterialdouble-negative propertiestailored anisotropyhigh elasticity and mechanical hysteresis |
| spellingShingle | Wenkai Liu Fenglei Li Yong Liang Eric Li Dahua Shou Bing Li Three-dimensional double negative mechanical metamaterials with tailored anisotropy Virtual and Physical Prototyping 3D mechanical metamaterial double-negative properties tailored anisotropy high elasticity and mechanical hysteresis |
| title | Three-dimensional double negative mechanical metamaterials with tailored anisotropy |
| title_full | Three-dimensional double negative mechanical metamaterials with tailored anisotropy |
| title_fullStr | Three-dimensional double negative mechanical metamaterials with tailored anisotropy |
| title_full_unstemmed | Three-dimensional double negative mechanical metamaterials with tailored anisotropy |
| title_short | Three-dimensional double negative mechanical metamaterials with tailored anisotropy |
| title_sort | three dimensional double negative mechanical metamaterials with tailored anisotropy |
| topic | 3D mechanical metamaterial double-negative properties tailored anisotropy high elasticity and mechanical hysteresis |
| url | https://www.tandfonline.com/doi/10.1080/17452759.2025.2500669 |
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