Pushing and Pulling on Ropes: Hierarchical Woven Materials
| Autor: | Carlos M. Portela, Widianto P. Moestopo, Arturo J. Mateos, Julia R. Greer, Ritchie M. Fuller |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
business.product_category
Materials science General Chemical Engineering General Physics and Astronomy Medicine (miscellaneous) Mechanical engineering 02 engineering and technology woven lattices 010402 general chemistry 01 natural sciences Biochemistry Genetics and Molecular Biology (miscellaneous) Brittleness extensible materials tensile responses Ultimate tensile strength Microfiber General Materials Science lcsh:Science Stress concentration Tension (physics) Communication General Engineering Control reconfiguration 021001 nanoscience & nanotechnology Compression (physics) Communications 0104 chemical sciences resilient materials architected materials lcsh:Q Resilience (materials science) 0210 nano-technology business |
| Zdroj: | Advanced Science, Vol 7, Iss 20, Pp n/a-n/a (2020) Advanced Science |
| ISSN: | 2198-3844 |
| Popis: | Hierarchy in natural and synthetic materials has been shown to grant these architected materials properties unattainable independently by their constituent materials. While exceptional mechanical properties such as extreme resilience and high deformability have been realized in many human‐made three‐dimensional (3D) architected materials using beam‐and‐junction‐based architectures, stress concentrations and constraints induced by the junctions limit their mechanical performance. A new hierarchical architecture in which fibers are interwoven to construct effective beams is presented. In situ tension and compression experiments of additively manufactured woven and monolithic lattices with 30 µm unit cells demonstrate the superior ability of woven architectures to achieve high tensile and compressive strains (>50%)—without failure events—via smooth reconfiguration of woven microfibers in the effective beams and junctions. Cyclic compression experiments reveal that woven lattices accrue less damage compared to lattices with monolithic beams. Numerical studies of woven beams with varying geometric parameters present new design spaces to develop architected materials with tailored compliance that is unachievable by similarly configured monolithic‐beam architectures. Woven hierarchical design offers a pathway to make traditionally stiff and brittle materials more deformable and introduces a new building block for 3D architected materials with complex nonlinear mechanics. An architected material design in which fibers are interwoven to construct effective beams is presented. Mechanical characterization of additively manufactured samples and numerical analysis reveal the superior ability of woven architectures to achieve high tensile and compressive strains while accruing minimal damage, opening a pathway to apply traditionally stiff and brittle materials in high‐deformation applications such as biomedical implants. |
| Databáze: | OpenAIRE |
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