| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Biological Materials Science
|
| Presentation Title |
Hooves and Horns – How Do They Avoid Impact Damage? |
| Author(s) |
Wei Huang, Alireza Zaheri, Nicholas A. Yaraghi, Wen Yang, Jae-Young Jung, Zezhou Li, Horacio Espinosa, Robert O. Ritchie, David Kisailus, Susan M. Stover, Joanna McKittrick |
| On-Site Speaker (Planned) |
Joanna McKittrick |
| Abstract Scope |
Here we report on the structure and compressive static and dynamic mechanical properties of sheep horns and equine hooves samples oriented in different directions. High-resolution synchrotron x-ray micro-computed tomography and transmission electron microscopy, coupled optical and scanning electron microscopy were used to characterize the pristine and deformed samples. The major microstructural elements are tubules and cell lamellae. The lamellae consist of keratin cells, with a disc-shaped morphology. The cells contain macrofibrils composed of intermediate filaments, parallel to the cell surface. Samples subjected to high strain rate Hopkinson bar experiments showed energy-absorption mechanisms such as shear banding, lamellae buckling and delamination. We believe that our findings will provide inspiration for bioinspired designs of energy-absorbent synthetic structures and materials. This work is funded by a Multi-University Research Initiative through the Air Force Office of Scientific Research (AFOSR-FA9550-15-1-0009) and a National Science Foundation Biomaterials Grant (1507978). |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |