Investigation of failure mechanisms of nacre at macro and nano scales
Article
Article Title | Investigation of failure mechanisms of nacre at macro and nano scales |
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ERA Journal ID | 44865 |
Article Category | Article |
Authors | Jingyu, L., Xu, Y., Hong, Y., Liu, Y., Yarlagadda, P. and Yan, C. |
Journal Title | Journal of The Mechanical Behavior of Biomedical Materials |
Journal Citation | 112, pp. 1-7 |
Article Number | 104018 |
Number of Pages | 7 |
Year | 2020 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 1751-6161 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jmbbm.2020.104018 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S1751616120305695 |
Abstract | Nacre is a natural composite featuring exceptional mechanical properties such as high strength and high toughness. Its unique structure is now universally applied in engineering bioinspired materials. On the other hand, it is still a technical challenge to investigate its interfacial strength and fracture mechanisms at micro or nano-scale. In this work, the interfacial strength and fracture mechanism of the ‘brick-mortar’ structure in nacre are investigated using micro-sized cantilever beam and bend samples. As compared to previous works, a high aragonite/biopolymer interfacial strength is observed (~298 MPa). The crack propagation path is investigated via experiment and finite element modelling and compared with the fracture mechanics analysis. It is confirmed that crack deflection to the aragonite/biopolymer interface contributes to a high overall toughness. This work provides a better understanding of the toughening mechanism in nacre and other bioinspired composites. |
Keywords | Biocomposite; Nanostructure; Interfacial property; Fracture; Nanoindentation; Focused ion beam |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401807. Nanomaterials |
400505. Construction materials | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Queensland University of Technology |
University of Western Australia |
https://research.usq.edu.au/item/y1804/investigation-of-failure-mechanisms-of-nacre-at-macro-and-nano-scales
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