Geometric Analysis and Experimental Studies of Hexachiral Structures.
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| Title: | Geometric Analysis and Experimental Studies of Hexachiral Structures. |
|---|---|
| Authors: | Plewa, Julian1 (AUTHOR) julian.plewa@us.edu.pl, Płońska, Małgorzata1,2 (AUTHOR), Feliksik, Kamil1 (AUTHOR), Junak, Grzegorz2 (AUTHOR) |
| Source: | Materials (1996-1944). Sep2025, Vol. 18 Issue 18, p4344. 27p. |
| Subjects: | Poisson's ratio, Geometric analysis, Chirality, Auxetic materials, Compression loads, Strains & stresses (Mechanics), Empirical research |
| Abstract: | Chiral metamaterial structures exhibit auxetic properties—when subjected to stress, they either contract or expand in the given direction, while maintaining an asymmetric geometric effect—they cannot overlap with their mirror image. The unit cells of hexachiral structures take the form of cylindrical nodes with ligaments attached to them. Under the action of external compressive forces, the ligaments bend and coil around the nodes. This is accompanied by a negative Poisson's ratio approaching minus one. In this case, it has been demonstrated both theoretically and experimentally that this value is independent of the degree of compression. In the course of geometric analysis, the value of Poisson's ratio has been shown to depend on the number of unit cells in the structure, and with a large number of unit cells, it reaches the theoretical value of minus one. The experiments were conducted on structures assembled from printed nodes and ligaments. It has been demonstrated that, as a result of uniaxial compression, various parts of the structure undergo distinct deformations. However, structures subjected to multi-directional compression—as elastic energy reservoirs—also exhibited negative Poisson's ratio values close to minus one, with their magnitude dependent on the degree of compression. [ABSTRACT FROM AUTHOR] |
| Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 188281896 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Geometric Analysis and Experimental Studies of Hexachiral Structures. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Plewa%2C+Julian%22">Plewa, Julian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> julian.plewa@us.edu.pl</i><br /><searchLink fieldCode="AR" term="%22Płońska%2C+Małgorzata%22">Płońska, Małgorzata</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Feliksik%2C+Kamil%22">Feliksik, Kamil</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Junak%2C+Grzegorz%22">Junak, Grzegorz</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Sep2025, Vol. 18 Issue 18, p4344. 27p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Poisson's+ratio%22">Poisson's ratio</searchLink><br /><searchLink fieldCode="DE" term="%22Geometric+analysis%22">Geometric analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Chirality%22">Chirality</searchLink><br /><searchLink fieldCode="DE" term="%22Auxetic+materials%22">Auxetic materials</searchLink><br /><searchLink fieldCode="DE" term="%22Compression+loads%22">Compression loads</searchLink><br /><searchLink fieldCode="DE" term="%22Strains+%26+stresses+%28Mechanics%29%22">Strains & stresses (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Empirical+research%22">Empirical research</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Chiral metamaterial structures exhibit auxetic properties—when subjected to stress, they either contract or expand in the given direction, while maintaining an asymmetric geometric effect—they cannot overlap with their mirror image. The unit cells of hexachiral structures take the form of cylindrical nodes with ligaments attached to them. Under the action of external compressive forces, the ligaments bend and coil around the nodes. This is accompanied by a negative Poisson's ratio approaching minus one. In this case, it has been demonstrated both theoretically and experimentally that this value is independent of the degree of compression. In the course of geometric analysis, the value of Poisson's ratio has been shown to depend on the number of unit cells in the structure, and with a large number of unit cells, it reaches the theoretical value of minus one. The experiments were conducted on structures assembled from printed nodes and ligaments. It has been demonstrated that, as a result of uniaxial compression, various parts of the structure undergo distinct deformations. However, structures subjected to multi-directional compression—as elastic energy reservoirs—also exhibited negative Poisson's ratio values close to minus one, with their magnitude dependent on the degree of compression. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/ma18184344 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 27 StartPage: 4344 Subjects: – SubjectFull: Poisson's ratio Type: general – SubjectFull: Geometric analysis Type: general – SubjectFull: Chirality Type: general – SubjectFull: Auxetic materials Type: general – SubjectFull: Compression loads Type: general – SubjectFull: Strains & stresses (Mechanics) Type: general – SubjectFull: Empirical research Type: general Titles: – TitleFull: Geometric Analysis and Experimental Studies of Hexachiral Structures. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Plewa, Julian – PersonEntity: Name: NameFull: Płońska, Małgorzata – PersonEntity: Name: NameFull: Feliksik, Kamil – PersonEntity: Name: NameFull: Junak, Grzegorz IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 09 Text: Sep2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 19961944 Numbering: – Type: volume Value: 18 – Type: issue Value: 18 Titles: – TitleFull: Materials (1996-1944) Type: main |
| ResultId | 1 |
