| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Biological Materials Science
|
| Presentation Title |
Structure-mechanics-performance of Fish-fins as Inspiration for Robotic Materials |
| Author(s) |
Francois Barthelat, Saurabh Das, Florent Hannard |
| On-Site Speaker (Planned) |
Francois Barthelat |
| Abstract Scope |
Fish fins do not contain muscles, yet fish can change the shape of their fins with high precision and speed, while producing large hydrodynamics forces without collapsing. Fins are stiffened by slender structures called “rays” made of two mineralized layers that sandwich a softer collagenous core. In this work we used a custom, multi-axis mechanical testing platform to characterize the morphing response and the flexural stiffness of individual rays from the rainbow trout Oncorhynchus mykiss. We found that the performance of natural rays requires unusual combinations of flexural and axial stiffness in the mineralized region, high contrast of stiffness between outer layer and core, geometrical stiffening in the core as well as strong gradients of properties along the ray. The structures and mechanisms of natural fin rays can inspire new designs for stiff, yet morphable robotic materials for a variety of engineering applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Biomaterials, Mechanical Properties, Modeling and Simulation |