| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Biological Materials Science
|
| Presentation Title |
K-9: On the Mechanical Properties of Dual-scale Microlattice of Starfish Ossicles: A Computational Study |
| Author(s) |
Hongshun Chen, Zian Jia, Zhifei Deng, Ling Li |
| On-Site Speaker (Planned) |
Hongshun Chen |
| Abstract Scope |
Echinoderms build their stereom with single-crystalline calcite. This enables the design of lattice with dual-scale crystallographic coalignment like the diamond-triply periodic minimal surface (diamond-TPMS) microlattice recently identified in the ossicles of starfish Protoreaster nodosus. Herein, we investigate the synergistic design of atomic- and lattice- scale crystallographic relationship in hierarchical lattices for tailored 3D mechanical properties. We first propose a methodology to predict the 3D elastic property surfaces of dual-scale architected lattices which was used to analyze the mechanical properties of the ossicle’s dual-scale diamond-TPMS microlattice. Our results indicate that the directions with low property values of calcite are coaligned with the directions with high property value of the diamond-TPMS lattice, mitigating calcite’s mechanical anisotropy. Furthermore, the ossicles often exhibit ~50% relative density, which does not show maximized mechanical isotropy. Additional analysis suggests that the ~50% relative density in ossicles is likely to be a trade-off design between mechanics and structure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Biomaterials, Computational Materials Science & Engineering, Mechanical Properties |