An optimized lozenge-chiral auxetic metamaterial with tunable auxeticity and stiffness
While auxetic metamaterials exhibit impressive mechanical traits, they frequently grapple with inherent conflict between their stiffness and auxeticity. In this study, we introduced an optimized lozenge-chiral auxetic metamaterial (oLCAM) with the dual objectives of balancing the auxeticity and stif...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127523009462 |
| _version_ | 1827375609552044032 |
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| author | Runsheng Hou Peng Dong Jiayi Hu Zhi Gong Sorour Sadeghzade Jinrui Cao Hongyan Yuan |
| author_facet | Runsheng Hou Peng Dong Jiayi Hu Zhi Gong Sorour Sadeghzade Jinrui Cao Hongyan Yuan |
| author_sort | Runsheng Hou |
| collection | DOAJ |
| description | While auxetic metamaterials exhibit impressive mechanical traits, they frequently grapple with inherent conflict between their stiffness and auxeticity. In this study, we introduced an optimized lozenge-chiral auxetic metamaterial (oLCAM) with the dual objectives of balancing the auxeticity and stiffness and achieving tunable properties concurrently. The mechanical performance of the proposed oLCAM was first compared with that of conventional lozenge auxetic metamaterial (cLAM) through both experimental and numerical studies. Herein, the transition stiffness (Etrans) was initially proposed as the typical metric evaluating the overall structural stiffness. Subsequently, the study proceeded to investigate the impact of crucial design parameters, specifically the angle of inclination and the radius of the circular core. The design method of oLCAM with tunable auxeticity and stiffness was finally established based on a multi-objective optimization model, achieving the balance between the auxeticity and stiffness of oLCAM. The results revealed the proposed oLCAM obtained a more stable deformation mode than cLAM. Two geometric parameters verified their significance on the above mechanical properties of oLCAM. The resulting optimal oLCAM structure has been proven to obtain both comparatively prominent auxeticity and stiffness. The established design method may have the potential to broaden the possibilities for metamaterial design and performance tuning. |
| first_indexed | 2024-03-08T11:54:30Z |
| format | Article |
| id | doaj.art-7fe383ce30eb4e78b7c775f943e3dae6 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-08T11:54:30Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-7fe383ce30eb4e78b7c775f943e3dae62024-01-24T05:16:10ZengElsevierMaterials & Design0264-12752024-01-01237112530An optimized lozenge-chiral auxetic metamaterial with tunable auxeticity and stiffnessRunsheng Hou0Peng Dong1Jiayi Hu2Zhi Gong3Sorour Sadeghzade4Jinrui Cao5Hongyan Yuan6Shenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061, USAShenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaShenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaShenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaShenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaShenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaShenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Corresponding author.While auxetic metamaterials exhibit impressive mechanical traits, they frequently grapple with inherent conflict between their stiffness and auxeticity. In this study, we introduced an optimized lozenge-chiral auxetic metamaterial (oLCAM) with the dual objectives of balancing the auxeticity and stiffness and achieving tunable properties concurrently. The mechanical performance of the proposed oLCAM was first compared with that of conventional lozenge auxetic metamaterial (cLAM) through both experimental and numerical studies. Herein, the transition stiffness (Etrans) was initially proposed as the typical metric evaluating the overall structural stiffness. Subsequently, the study proceeded to investigate the impact of crucial design parameters, specifically the angle of inclination and the radius of the circular core. The design method of oLCAM with tunable auxeticity and stiffness was finally established based on a multi-objective optimization model, achieving the balance between the auxeticity and stiffness of oLCAM. The results revealed the proposed oLCAM obtained a more stable deformation mode than cLAM. Two geometric parameters verified their significance on the above mechanical properties of oLCAM. The resulting optimal oLCAM structure has been proven to obtain both comparatively prominent auxeticity and stiffness. The established design method may have the potential to broaden the possibilities for metamaterial design and performance tuning.http://www.sciencedirect.com/science/article/pii/S0264127523009462AuxeticChiralTunable stiffnessMechanical metamaterialsMulti-objective optimization |
| spellingShingle | Runsheng Hou Peng Dong Jiayi Hu Zhi Gong Sorour Sadeghzade Jinrui Cao Hongyan Yuan An optimized lozenge-chiral auxetic metamaterial with tunable auxeticity and stiffness Materials & Design Auxetic Chiral Tunable stiffness Mechanical metamaterials Multi-objective optimization |
| title | An optimized lozenge-chiral auxetic metamaterial with tunable auxeticity and stiffness |
| title_full | An optimized lozenge-chiral auxetic metamaterial with tunable auxeticity and stiffness |
| title_fullStr | An optimized lozenge-chiral auxetic metamaterial with tunable auxeticity and stiffness |
| title_full_unstemmed | An optimized lozenge-chiral auxetic metamaterial with tunable auxeticity and stiffness |
| title_short | An optimized lozenge-chiral auxetic metamaterial with tunable auxeticity and stiffness |
| title_sort | optimized lozenge chiral auxetic metamaterial with tunable auxeticity and stiffness |
| topic | Auxetic Chiral Tunable stiffness Mechanical metamaterials Multi-objective optimization |
| url | http://www.sciencedirect.com/science/article/pii/S0264127523009462 |
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