Investigation of Modified Auxetic Structures from Rigid Rotating Squares
Auxetic structures exhibit unusual changes in size, expanding laterally upon stretching instead of contracting. This paper presents this effect in a failsafe mode in structures made of rigid squares. We applied the concept of auxetic structures made of rigid rotating squares (from Grima and Evans) a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/8/2848 |
| _version_ | 1797410259914981376 |
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| author | Julian Plewa Małgorzata Płońska Paweł Lis |
| author_facet | Julian Plewa Małgorzata Płońska Paweł Lis |
| author_sort | Julian Plewa |
| collection | DOAJ |
| description | Auxetic structures exhibit unusual changes in size, expanding laterally upon stretching instead of contracting. This paper presents this effect in a failsafe mode in structures made of rigid squares. We applied the concept of auxetic structures made of rigid rotating squares (from Grima and Evans) and offer a novel solution for connecting them. By introducing axes of rotation on the surface of the squares, a reliable working system is obtained, free from stress, in which the squares can come into contact with each other and completely cover the surface of the structure, or, in the open position, form regularly arranged pores. Herein, we present a new 2D auxetic metamaterial that is mathematically generated based on a theoretical relationship of the angle between the edges of a square and the position of the axis of rotation. Physical models were generated in the form of a planar structure and in the form of a circular closed structure. Such physical models confirmed our initial considerations and the geometrical relationships, offering new application possibilities. The novel structure that was designed and manufactured for the purpose of the paper can be considered as a new proposal in the market of auxetic materials. |
| first_indexed | 2024-03-09T04:27:20Z |
| format | Article |
| id | doaj.art-efec14c9d90849d8abb15e3d5bddfeb4 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T04:27:20Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-efec14c9d90849d8abb15e3d5bddfeb42023-12-03T13:39:17ZengMDPI AGMaterials1996-19442022-04-01158284810.3390/ma15082848Investigation of Modified Auxetic Structures from Rigid Rotating SquaresJulian Plewa0Małgorzata Płońska1Paweł Lis2Faculty of Science and Technology, Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty Str. 1a, 41-500 Chorzów, PolandFaculty of Science and Technology, Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty Str. 1a, 41-500 Chorzów, PolandFaculty of Science and Technology, Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty Str. 1a, 41-500 Chorzów, PolandAuxetic structures exhibit unusual changes in size, expanding laterally upon stretching instead of contracting. This paper presents this effect in a failsafe mode in structures made of rigid squares. We applied the concept of auxetic structures made of rigid rotating squares (from Grima and Evans) and offer a novel solution for connecting them. By introducing axes of rotation on the surface of the squares, a reliable working system is obtained, free from stress, in which the squares can come into contact with each other and completely cover the surface of the structure, or, in the open position, form regularly arranged pores. Herein, we present a new 2D auxetic metamaterial that is mathematically generated based on a theoretical relationship of the angle between the edges of a square and the position of the axis of rotation. Physical models were generated in the form of a planar structure and in the form of a circular closed structure. Such physical models confirmed our initial considerations and the geometrical relationships, offering new application possibilities. The novel structure that was designed and manufactured for the purpose of the paper can be considered as a new proposal in the market of auxetic materials.https://www.mdpi.com/1996-1944/15/8/2848auxetic structuresmetamaterialsnegative Poisson’s ratio (NPR) |
| spellingShingle | Julian Plewa Małgorzata Płońska Paweł Lis Investigation of Modified Auxetic Structures from Rigid Rotating Squares Materials auxetic structures metamaterials negative Poisson’s ratio (NPR) |
| title | Investigation of Modified Auxetic Structures from Rigid Rotating Squares |
| title_full | Investigation of Modified Auxetic Structures from Rigid Rotating Squares |
| title_fullStr | Investigation of Modified Auxetic Structures from Rigid Rotating Squares |
| title_full_unstemmed | Investigation of Modified Auxetic Structures from Rigid Rotating Squares |
| title_short | Investigation of Modified Auxetic Structures from Rigid Rotating Squares |
| title_sort | investigation of modified auxetic structures from rigid rotating squares |
| topic | auxetic structures metamaterials negative Poisson’s ratio (NPR) |
| url | https://www.mdpi.com/1996-1944/15/8/2848 |
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