Towards the realization of composite metastructures: A failure analysis of connections
Metastructures hold significant potential for applications such as adaptive structures and soft robotics. Architectures of fiber-reinforced polymer metastructures may relate to modular arrangement of straight and curved laminates, with their connections to resemble perfect cracks, thus susceptible t...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-05-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127524002466 |
| _version_ | 1797224361326804992 |
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| author | Victor Gaultier Georgios A. Pappas |
| author_facet | Victor Gaultier Georgios A. Pappas |
| author_sort | Victor Gaultier |
| collection | DOAJ |
| description | Metastructures hold significant potential for applications such as adaptive structures and soft robotics. Architectures of fiber-reinforced polymer metastructures may relate to modular arrangement of straight and curved laminates, with their connections to resemble perfect cracks, thus susceptible to delamination. This study investigated geometrical effects on the load-carrying capabilities of these connections upon a global tensile deformation, as well as lean modeling tools to facilitate the development of architected composite metastructures. Numerical fracture mechanics approach on different connection geometries and thicknesses showed that connection delamination is a critical failure mode, but crack-driving-force has low dependence on connection shape for given ligament thickness (and stiffness). Adopted analytical models could capture either moment or force-driven delamination failure, while the intermediate regime necessitates numerical tools. First-ply failure may precede depending on shape and ligament stiffness. These trends were also verified on an exemplary rotating chiral composite geometry. Furthermore, interface load-carrying capability improvements were studied via design considerations including connection filler material and element variable thickness. Indicatively, the latter showed a 157 % increase in bending deflection (and global deformations), while reducing crack driving force by 38 % for a given load case. The conducted analysis offers valuable insights into the design of lightweight, load-carrying composite metastructures. |
| first_indexed | 2024-04-24T13:51:54Z |
| format | Article |
| id | doaj.art-c13dd0f3bade4d8aba44fded70412a1d |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-24T13:51:54Z |
| publishDate | 2024-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-c13dd0f3bade4d8aba44fded70412a1d2024-04-04T05:03:08ZengElsevierMaterials & Design0264-12752024-05-01241112873Towards the realization of composite metastructures: A failure analysis of connectionsVictor Gaultier0Georgios A. Pappas1Corresponding author.; Laboratory of Composite Materials and Adaptive Structures, ETH Zurich, Leonhardstrasse 21, 8092 Zürich, SwitzerlandLaboratory of Composite Materials and Adaptive Structures, ETH Zurich, Leonhardstrasse 21, 8092 Zürich, SwitzerlandMetastructures hold significant potential for applications such as adaptive structures and soft robotics. Architectures of fiber-reinforced polymer metastructures may relate to modular arrangement of straight and curved laminates, with their connections to resemble perfect cracks, thus susceptible to delamination. This study investigated geometrical effects on the load-carrying capabilities of these connections upon a global tensile deformation, as well as lean modeling tools to facilitate the development of architected composite metastructures. Numerical fracture mechanics approach on different connection geometries and thicknesses showed that connection delamination is a critical failure mode, but crack-driving-force has low dependence on connection shape for given ligament thickness (and stiffness). Adopted analytical models could capture either moment or force-driven delamination failure, while the intermediate regime necessitates numerical tools. First-ply failure may precede depending on shape and ligament stiffness. These trends were also verified on an exemplary rotating chiral composite geometry. Furthermore, interface load-carrying capability improvements were studied via design considerations including connection filler material and element variable thickness. Indicatively, the latter showed a 157 % increase in bending deflection (and global deformations), while reducing crack driving force by 38 % for a given load case. The conducted analysis offers valuable insights into the design of lightweight, load-carrying composite metastructures.http://www.sciencedirect.com/science/article/pii/S0264127524002466MetastructuresFiber Reinforced PolymersLightweightConnectionsDelaminationCrack driving force |
| spellingShingle | Victor Gaultier Georgios A. Pappas Towards the realization of composite metastructures: A failure analysis of connections Materials & Design Metastructures Fiber Reinforced Polymers Lightweight Connections Delamination Crack driving force |
| title | Towards the realization of composite metastructures: A failure analysis of connections |
| title_full | Towards the realization of composite metastructures: A failure analysis of connections |
| title_fullStr | Towards the realization of composite metastructures: A failure analysis of connections |
| title_full_unstemmed | Towards the realization of composite metastructures: A failure analysis of connections |
| title_short | Towards the realization of composite metastructures: A failure analysis of connections |
| title_sort | towards the realization of composite metastructures a failure analysis of connections |
| topic | Metastructures Fiber Reinforced Polymers Lightweight Connections Delamination Crack driving force |
| url | http://www.sciencedirect.com/science/article/pii/S0264127524002466 |
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