| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Biological Materials Science
|
| Presentation Title |
On the Strength Across the Hair Species and the Evolution of Hair Fracture |
| Author(s) |
Wen Yang, Robert Ritchie, Marc Meyers |
| On-Site Speaker (Planned) |
Wen Yang |
| Abstract Scope |
The hair of mammals varies in diameter across species from ~60 µm to over ~400 µm. We establish here that the tensile strength of hair generally decreases with increasing diameter. Although there is commonality in morphology, in that the hair from all species possesses an internal cortex surrounded by cuticles, there are also significant differences in structure that specifically contribute to hair strength. In this work, the internal structure of the hair from different species is examined, with some unique peculiarities in javelina and capybara hair uncovered. The good correlation of the hair strength and its dependence on dimension is rationalized using Weibull analysis which implies that the failure strength is dictated by the probability distribution of flaws within the cortex. The evolution of the hair fracture, as well as the structural recovery of the remaining fractured hair, are revealed together with the specific functions of the cuticle and cortex. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |