Equine Hoof Wall Deformation: Novel Aspects Revealed

Author:

Lazarus Benjamin S.1ORCID,Luu Rachel K.23,Ruiz-Pérez Samuel4,Barbosa Josiane D. V.5,Jasiuk Iwona6ORCID,Meyers Marc A.127ORCID

Affiliation:

1. Materials Science and Engineering Program University of California San Diego 9500 Gilman Drive La Jolla CA 92093 USA

2. Department of Mechanical and Aerospace Engineering University of California San Diego 9500 Gilman Drive La Jolla CA 92093 USA

3. Department of Materials Science and Engineering Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 USA

4. Facultad de Ciencias Universidad Nacional Autónoma de México Investigación Científica Ciudad Universitaria Coyoacán Ciudad de México 04510 Mexico

5. Department of Materials University Center SENAI CIMATEC 1845 Avenida Orlando Gomes Piatã Salvador BA 41650 Brazil

6. Department of Mechanical Science and Engineering University of Illinois Urbana-Champaign 1206 West Green Street Urbana IL 61801 USA

7. Department of Nanoengineering University of California San Diego 9500 Gilman Drive La Jolla CA 92093 USA

Abstract

The equine hoof wall has a unique hierarchical structure that allows it to survive high‐impact scenarios. Previous authors have explored the compressive, viscoelastic, and fracture control properties of the hoof wall and suggested that this complex structure plays a vital role in the hoof's behavior. However, the link between the structure and the behavior of the hoof wall has been made primarily with the use of post‐fracture analysis. Here, periodic microcomputed tomography scans are used to observe the temporal behavior of the hoof's meso and microstructures during compression, fracture, and relaxation. These results shed light on the structural anisotropy of the hoof wall and how its hollow tubules behave when compressed in different directions, at different hydration levels, and in various locations within the hoof wall. The behavior of tubule bridges during compression is also reported for the first time. This study elucidates several fracture phenomena, including the way cracks are deflected at tubule interfaces and tubule bridging, tubule arresting, and fiber bridging. Finally, relaxation tests are used to show how the tubule cavities can regain their shape after compression.

Funder

National Science Foundation

Publisher

Wiley

Subject

General Earth and Planetary Sciences,General Environmental Science

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