| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
|
| Presentation Title |
Toughness Amplification in Bioinspired Nanoarchitectured Materials |
| Author(s) |
Zainab Patel, Lucas Meza |
| On-Site Speaker (Planned) |
Zainab Patel |
| Abstract Scope |
Natural materials display high strength and toughness due to material interactions at the micro- and nanoscale, but it has been challenging to quantify materials at these length scales experimentally. This work demonstrates a strategy to study microscale toughness in a novel nanoarchitected material. We use two-photon lithography to create polymeric microscale bouligand-style beams with sub-micron features in a single-edge notch three-point bend setup and use in-situ nanomechanical testing to analyze their fracture characteristics. Using the J-integral method, we quantify the crack growth resistance as a function of architecture and density. Specimens demonstrate delayed crack initiation, higher normalized J toughness, and a significant enhancement in energy dissipation with increasing twist angles providing fundamental insight into the effect of architectural tortuosity on fracture processes. This combined understanding of the effect of architecture and specimen length scale on toughness is crucial to developing new methods to engineer tough, lightweight materials at the macroscale. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Additive Manufacturing, Mechanical Properties |