Experimental and numerical investigation of the toughening mechanisms in bioinspired composites prepared by freeze casting
Article
Article Title | Experimental and numerical investigation of the toughening mechanisms in bioinspired composites prepared by freeze casting |
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ERA Journal ID | 4884 |
Article Category | Article |
Authors | Liu, Jingyu, Bai, Ruixiang, Lei, Zhenkun, Xu, Chun, Ye, Qingsong, Martens, Wayde, Yarlagadda, Prasad KDV and Yan, Cheng |
Journal Title | Composites Science and Technology |
Journal Citation | 182 |
Article Number | 107768 |
Number of Pages | 7 |
Year | 2019 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0266-3538 |
1879-1050 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.compscitech.2019.107768 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S026635381931053 |
Abstract | Strength and toughness have been generally deemed as two incompatible properties in many materials. However, balanced toughness and strength have been observed in biomaterials, whose hard and soft phases are arranged into unique and hierarchical architectures. Therefore, it is necessary to understand the underpinning toughening mechanisms and develop reliable procedures that can mimic these unique structures at different length scales. Here, alumina-Poly(methyl methacrylate) (PMMA) composites were prepared using freeze casting combined with interface modification (silanization treatment). High failure strain (~4.5%) is achieved in these composites. The overall toughness can be tailored through modifying the interfacial strength between alumina and PMMA. A weaker interface (~8 MPa) leads to a greater toughness (3.1 MPa m1/2), which is even greater than the constituent phases, i.e., alumina (2.71 MPa m1/2) and PMMA (1.1 MPa m1/2). Using a cohesive zone model and extended finite element method (XFEM), the toughening mechanism has been investigated. |
Keywords | Bioinspired composites; Fracture toughness; Interfacial strength; Modelling; Finite element analysis (FEA) |
ANZSRC Field of Research 2020 | 4014. Manufacturing engineering |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Queensland University of Technology |
Dalian University of Technology, China | |
University of Queensland |
https://research.usq.edu.au/item/y186q/experimental-and-numerical-investigation-of-the-toughening-mechanisms-in-bioinspired-composites-prepared-by-freeze-casting
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