Tag Archives: Staggered fibrils and damageable interfaces lead concurrently and independently to hysteretic energy absorption and inhomogeneous strain fields in cyclically loaded antler bone

Reindeer antlers and resistance to breakage

The press office at Queen Mary University of London (UK) must have had fun with the press release (titled, Rudolph’s antlers inspire next generation of unbreakable materials) for this timely piece of research. From a Dec. 19, 2016 news item on ScienceDaily,

Scientists from Queen Mary University of London (QMUL) have discovered the secret behind the toughness of deer antlers and how they can resist breaking during fights.

The team looked at the antler structure at the ‘nano-level’, which is incredibly small, almost one thousandth of the thickness of a hair strand, and were able to identify the mechanisms at work, using state-of-the-art computer modelling and x-ray techniques.

A Dec. 19, 2016 QMUL press release on EurekAllert, which originated the news item, provides a bit more detail,

First author Paolino De Falco from QMUL’s School of Engineering and Materials Science said: “The fibrils that make up the antler are staggered rather than in line with each other. This allows them to absorb the energy from the impact of a clash during a fight.”

The research, published today [Dec. 19, 2016] in the journal ACS Biomaterials Science & Engineering, provides new insights and fills a previous gap in the area of structural modelling of bone. It also opens up possibilities for the creation of a new generation of materials that can resist damage.

Co-author Dr Ettore Barbieri, also from QMUL’s School of Engineering and Materials Science, said: “Our next step is to create a 3D printed model with fibres arranged in staggered configuration and linked by an elastic interface.

The aim is to prove that additive manufacturing – where a prototype can be created a layer at a time – can be used to create damage resistant composite material.”

Here’s a link to and a citation for the paper,

Staggered fibrils and damageable interfaces lead concurrently and independently to hysteretic energy absorption and inhomogeneous strain fields in cyclically loaded antler bone by Paolino De Falco, Ettore Barbieri, Nicola M. Pugno, and Himadri S. Gupta. ACS Biomater. Sci. Eng., Just Accepted Manuscript DOI: 10.1021/acsbiomaterials.6b00637 Publication Date (Web): December 19, 2016

Copyright © 2016 American Chemical Society

This paper is behind a paywall.