Design of multi-material isotropic auxetic microlattices with zero thermal expansion
Auxetic metamaterials are a type of mechanical metamaterials possessing negative Poisson’s ratios and displaying counter-intuitive deformation behavior, which are useful for a range of potential applications. However, two limitations restrain their further development and practical application. Firs...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-10-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522006736 |
| _version_ | 1811254934987866112 |
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| author | Zuyu Li Wei Gao Michael Yu Wang Zhen Luo |
| author_facet | Zuyu Li Wei Gao Michael Yu Wang Zhen Luo |
| author_sort | Zuyu Li |
| collection | DOAJ |
| description | Auxetic metamaterials are a type of mechanical metamaterials possessing negative Poisson’s ratios and displaying counter-intuitive deformation behavior, which are useful for a range of potential applications. However, two limitations restrain their further development and practical application. First, most current designs are not isotropic, although isotropic materials offer wide-ranging applications due to their identical properties in different directions. Second, most engineering design problems require multifunctionalities of structures, such as both the auxetic behavior during deformation and thermal stability over various temperatures ranges. To overcome the above two shortcomings, this paper will develop a systematic method for designing novel three-dimensional auxetic microlattices. A density-based topology optimization method will be used to distribute two phases of solid materials within a given cubical design domain, and the optimization is formulated under the assumption that all intermediate designs during the optimization will have at least elastic cubic symmetry. The optimized microlattices will exhibit desired properties, including elastic isotropy, negative Poisson’s ratio, and zero thermal expansion. A newly designed multi-material auxetic microlattice will be numerically demonstrated through finite element analysis to validate its elastic isotropy, auxetic property, and zero thermal expansion for withstanding temperature changes. |
| first_indexed | 2024-04-12T17:16:01Z |
| format | Article |
| id | doaj.art-829e0df062074553bb34d141a9841a39 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-12T17:16:01Z |
| publishDate | 2022-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-829e0df062074553bb34d141a9841a392022-12-22T03:23:39ZengElsevierMaterials & Design0264-12752022-10-01222111051Design of multi-material isotropic auxetic microlattices with zero thermal expansionZuyu Li0Wei Gao1Michael Yu Wang2Zhen Luo3School of Mechanical and Mechatronic Engineering, University of Technology Sydney, Ultimo, NSW 2007, AustraliaSchool of Civil and Environmental Engineering, University of New South Wales, Kensington, NSW 2052, AustraliaDepartment of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria 3800, AustraliaSchool of Mechanical and Mechatronic Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia; Corresponding author.Auxetic metamaterials are a type of mechanical metamaterials possessing negative Poisson’s ratios and displaying counter-intuitive deformation behavior, which are useful for a range of potential applications. However, two limitations restrain their further development and practical application. First, most current designs are not isotropic, although isotropic materials offer wide-ranging applications due to their identical properties in different directions. Second, most engineering design problems require multifunctionalities of structures, such as both the auxetic behavior during deformation and thermal stability over various temperatures ranges. To overcome the above two shortcomings, this paper will develop a systematic method for designing novel three-dimensional auxetic microlattices. A density-based topology optimization method will be used to distribute two phases of solid materials within a given cubical design domain, and the optimization is formulated under the assumption that all intermediate designs during the optimization will have at least elastic cubic symmetry. The optimized microlattices will exhibit desired properties, including elastic isotropy, negative Poisson’s ratio, and zero thermal expansion. A newly designed multi-material auxetic microlattice will be numerically demonstrated through finite element analysis to validate its elastic isotropy, auxetic property, and zero thermal expansion for withstanding temperature changes.http://www.sciencedirect.com/science/article/pii/S0264127522006736Topology optimizationElastic isotropyMicrolattice metamaterialsNegative Poisson’s ratioZero thermal expansion |
| spellingShingle | Zuyu Li Wei Gao Michael Yu Wang Zhen Luo Design of multi-material isotropic auxetic microlattices with zero thermal expansion Materials & Design Topology optimization Elastic isotropy Microlattice metamaterials Negative Poisson’s ratio Zero thermal expansion |
| title | Design of multi-material isotropic auxetic microlattices with zero thermal expansion |
| title_full | Design of multi-material isotropic auxetic microlattices with zero thermal expansion |
| title_fullStr | Design of multi-material isotropic auxetic microlattices with zero thermal expansion |
| title_full_unstemmed | Design of multi-material isotropic auxetic microlattices with zero thermal expansion |
| title_short | Design of multi-material isotropic auxetic microlattices with zero thermal expansion |
| title_sort | design of multi material isotropic auxetic microlattices with zero thermal expansion |
| topic | Topology optimization Elastic isotropy Microlattice metamaterials Negative Poisson’s ratio Zero thermal expansion |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522006736 |
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