| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nano and Micro Additive Manufacturing
|
| Presentation Title |
Tuning Micro-Architected Mechanical Metamaterials by Controlling Structural Disorder |
| Author(s) |
Alexander Groetsch, Kate Ainger, Lorenzo Valdevit |
| On-Site Speaker (Planned) |
Alexander Groetsch |
| Abstract Scope |
The tremendous design freedom of metamaterials allows highly functionalized architectures with unique properties. To extend these functionalities even further, current efforts in the metamaterials’ community are targeted to harness the effect of disorder and heterogeneity, omnipresent features in nature. Here, we show how the elasto-plastic behavior of mechanical metamaterials can be tailored by the amount of this randomness. Shell-based topologies are used due to their superiority in energy absorption, strength and stiffness at a low weight. Polymeric micro-architectures are 3D-printed using two-photon lithography, and the effect of disorder on the micro-mechanical behavior quantified by in situ experiments. Transitioning from periodic to random architectures leads to a reduced yield strength but a highly homogeneous deformation, characterized by a prolonged plastic plateau and stress-delocalization. We observe that at high relative densities, the effect of disorder vanishes. Furthermore, we present data for other materials and an extension towards tailored opto-mechanical properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Additive Manufacturing, Polymers |