Sun, Jiyu, Wu, Wei, Xue, Weiliang, Jin, Tong and Liu, Xianping (2016) Anisotropic nanomechanical properties of bovine horn using modulus mapping. IET Nanobiotechnology, 10 (5). pp. 334-339. doi:10.1049/iet-nbt.2015.0082 ISSN 1751-8741.

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Abstract

Bovine horns are durable that they can withstand an extreme loading force which with special structures and mechanical properties. In this paper, we apply quasi-static nanoindentation and modulus mapping techniques to research the nanomechanical properties of bovine horn in the transverse direction (TD) and longitudinal direction (LD). In quasi-static nanoindentation, the horn’s modulus and hardness in the inner layer and the outer layer demonstrated a gradual increase in both TD and LD. Laser scanning confocal microscopy (LSCM) revealed microstructure in the horn with wavy morphology in the TD cross-section and laminate in the LD cross-section. When using tensile tests or quasi-static nanoindentation tests alone, the anisotropy of the mechanical properties of bovine horn were not obvious. However, when using modulus mapping, storage modulus (E′), loss modulus (E″) and loss ratio (tan δ) are clearly different depending on the position in the TD and LD. Modulus mapping is proposed as accurately describing the internal structures of bovine horn and helpful in understanding the horn’s energy-absorption, stiffness and strength that resists forces during fighting.

Item Type:	Journal Article
Subjects:	Q Science > Q Science (General) Q Science > QL Zoology
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > Engineering
Library of Congress Subject Headings (LCSH):	Horns, Anisotropy, Nanostructures
Journal or Publication Title:	IET Nanobiotechnology
Publisher:	Institution of Engineering and Technology
ISSN:	1751-8741
Official Date:	October 2016
Dates:	Date Event October 2016 Published 7 March 2016 Available 1 February 2016 Accepted 11 October 2015 Submitted
Volume:	10
Number:	5
Number of Pages:	17
Page Range:	pp. 334-339
DOI:	10.1049/iet-nbt.2015.0082
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Date of first compliant deposit:	14 March 2016
Date of first compliant Open Access:	15 March 2016
Funder:	Guo jia zi ran ke xue ji jin wei yuan hui (China) [National Natural Science Foundation of China] (NSFC), Seventh Framework Programme (European Commission) (FP7)
Grant number:	31172144 (NSFC), 644971 (FP7)
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