About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nix Award and Lecture Symposium: Mechanics of Materials Across Scales: Experiments, Modeling, and Design
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| Presentation Title |
Magneto-elastic Granular Architectures (MEGAs) with High Tensile Ductility and Programmability |
| Author(s) |
Xinyan Yang, Junqing Leng, Yitong Chen, Bolin Chen, Wei Chen, Cheng Sun, Sinan Keten |
| On-Site Speaker (Planned) |
Sinan Keten |
| Abstract Scope |
Magneto-elastic Granular Architectures (MEGAs) consisting of 3D-printed star-shaped units and magnetic branch termini offer modularity and reversibility not seen in conventional monolithic materials. Tailoring magnetic strength and star topology leads to ordered structures with distinct mechanical responses. However, single-component MEGAs typically exhibit limited tensile extensibility. Here we show that binary superlattices, introduced by combining two-branch (Bar) and three-branch (Y) units, enable programmable tensile strength and ductility and yield architectures with extensibility far exceeding that of single-component systems. By tuning unit sizes, we uncover hierarchical dual networks in which subnetwork units provide hidden length released via sacrificial magnetic bond detachment during deformation. We construct a phase diagram, a performance map, and a predictive framework to reveal design rules linking unit geometry, deformation pathways, and macroscopic response. Our work opens opportunities for easy-to-assemble and reconfigurable architected metamaterials with controllable brittle--ductile transitions, with implications for adaptive load-bearing, impact mitigation, and robotic systems. |
| Proceedings Inclusion? |
Planned: None Selected |
Magneto-elastic Granular Architectures (MEGAs) with High Tensile Ductility and Programmability