The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix
The extreme and unconventional properties of mechanical metamaterials originate in their sophisticated internal architectures. Traditionally, the architecture of mechanical metamaterials is decided on in the design stage and cannot be altered after fabrication. However, the phenomenon of elastic ins...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/8/2038 |
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| author | Pavel I. Galich Aliya Sharipova Slava Slesarenko |
| author_facet | Pavel I. Galich Aliya Sharipova Slava Slesarenko |
| author_sort | Pavel I. Galich |
| collection | DOAJ |
| description | The extreme and unconventional properties of mechanical metamaterials originate in their sophisticated internal architectures. Traditionally, the architecture of mechanical metamaterials is decided on in the design stage and cannot be altered after fabrication. However, the phenomenon of elastic instability, usually accompanied by a reconfiguration in periodic lattices, can be harnessed to alter their mechanical properties. Here, we study the behavior of mechanical metamaterials consisting of hexagonal networks embedded into a soft matrix. Using finite element analysis, we reveal that under specific conditions, such metamaterials can undergo sequential buckling at two different strain levels. While the first reconfiguration keeps the periodicity of the metamaterial intact, the secondary buckling is accompanied by the change in the global periodicity and formation of a new periodic unit cell. We reveal that the critical strains for the first and the second buckling depend on the metamaterial geometry and the ratio between elastic moduli. Moreover, we demonstrate that the buckling behavior can be further controlled by the placement of the rigid circular inclusions in the rotation centers of order 6. The observed sequential buckling in bulk metamaterials can provide additional routes to program their mechanical behavior and control the propagation of elastic waves. |
| first_indexed | 2024-03-10T12:12:28Z |
| format | Article |
| id | doaj.art-549b0854e3844134a0d0d8ee25ad2719 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T12:12:28Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-549b0854e3844134a0d0d8ee25ad27192023-11-21T16:05:37ZengMDPI AGMaterials1996-19442021-04-01148203810.3390/ma14082038The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft MatrixPavel I. Galich0Aliya Sharipova1Slava Slesarenko2Department of Aerospace Engineering, Technion—Israel Institute of Technology, Haifa 32000, IsraelInstitute of Strength Physics and Materials Science, SB RAS, 634055 Tomsk, RussiaFaculty of Mathematics and Mechanics, Saint Petersburg State University, 198504 Saint Petersburg, RussiaThe extreme and unconventional properties of mechanical metamaterials originate in their sophisticated internal architectures. Traditionally, the architecture of mechanical metamaterials is decided on in the design stage and cannot be altered after fabrication. However, the phenomenon of elastic instability, usually accompanied by a reconfiguration in periodic lattices, can be harnessed to alter their mechanical properties. Here, we study the behavior of mechanical metamaterials consisting of hexagonal networks embedded into a soft matrix. Using finite element analysis, we reveal that under specific conditions, such metamaterials can undergo sequential buckling at two different strain levels. While the first reconfiguration keeps the periodicity of the metamaterial intact, the secondary buckling is accompanied by the change in the global periodicity and formation of a new periodic unit cell. We reveal that the critical strains for the first and the second buckling depend on the metamaterial geometry and the ratio between elastic moduli. Moreover, we demonstrate that the buckling behavior can be further controlled by the placement of the rigid circular inclusions in the rotation centers of order 6. The observed sequential buckling in bulk metamaterials can provide additional routes to program their mechanical behavior and control the propagation of elastic waves.https://www.mdpi.com/1996-1944/14/8/2038mechanical metamaterialsbucklingsequential bucklinginstabilitieselastic wave propagationreconfiguration |
| spellingShingle | Pavel I. Galich Aliya Sharipova Slava Slesarenko The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix Materials mechanical metamaterials buckling sequential buckling instabilities elastic wave propagation reconfiguration |
| title | The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix |
| title_full | The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix |
| title_fullStr | The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix |
| title_full_unstemmed | The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix |
| title_short | The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix |
| title_sort | emergence of sequential buckling in reconfigurable hexagonal networks embedded into soft matrix |
| topic | mechanical metamaterials buckling sequential buckling instabilities elastic wave propagation reconfiguration |
| url | https://www.mdpi.com/1996-1944/14/8/2038 |
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