Fracture Toughness Properties of Three Different Biomaterials Measured by Nanoindentation

The fracture toughness of hard biomaterials, such as nacre, bovine hoof wall and beetle cuticle, is associated with fibrous or lamellar structures that deflect or stop growing cracks. Their hardness and reduced modulus were measured by using a nanoindenter in this paper. Micro/nanoscale cracks were...

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Bibliographic Details
Published in:Journal of bionics engineering 2007-03, Vol.4 (1), p.11-17
Main Authors: Sun, Ji-yu, Tong, Jin
Format: Article
Language:English
Subjects:
biomaterials
biomimetics
bionics
fracture toughness
laminated structure
nanoindentation
仿生学
断裂韧度
生物材料
纳米压入技术
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Summary:The fracture toughness of hard biomaterials, such as nacre, bovine hoof wall and beetle cuticle, is associated with fibrous or lamellar structures that deflect or stop growing cracks. Their hardness and reduced modulus were measured by using a nanoindenter in this paper. Micro/nanoscale cracks were generated by nanoindentation using a Berkovich tip. Nanoindentation of nacre and bovine hoof wall resulted in pile-up around the indent. It was found that the fracture toughness （Kc） of bovine hoof wall is the maximum, the second is nacre, and the elytra cuticle of dung beetle is the least one.
ISSN:1672-6529
2543-2141
DOI:10.1016/S1672-6529(07)60007-9