利用仿生設計具高性能之創新結構材料

林湘迪

doi:10.6342/NTU201902474

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利用仿生設計具高性能之創新結構材料

Design Structural Materials with Superior Mechanical Performance by Bio-inspiration

林湘迪 , Masters　　Advisor：張書瑋　　

繁體中文 DOI： 10.6342/NTU201902474

模擬；機械性質；仿生材料；複合材料；骨骼；楓香； Simulation ； Mechanical Property ； Bio-inspired Materials ； Composites Material ； Bone ； Liquidambar formosana

Abstract │ Reference (40) │ Altmetrics

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In recent years, biological structures have risen as a source of inspiration for the material design. There is great potential in designing high-performance structural materials by mimicking the construction and properties of biological structures. Biomaterials are usually made of composite materials using hard and brittle minerals, along with soft and tough proteins. Due to this composition, the strengthening and toughening mechanisms of biomaterials are superior to artificial materials. Thus, the objective of this study is to discuss the effect of microstructures within composite materials in terms of mechanical properties.
This study focuses on the strength and toughness of structural biological materials.  In this study, we present a 2-D lattice spring model to predict the performance of composite materials, and their failure modes. The model is able to precisely estimate the material performance and reproduce the toughening mechanisms. In this study, bone inspired structure and Liquidambar formosana inspired structure were designed separately; the osteon in bone is concentrically arranged. In addition, by changing the design parameters of the bone inspired structure, both the circular microstructure and the ratio of axial and length were analyzed. Furthermore, the influence of the distance between the topography and different sizes of microstructures were analyzed. We have found one particular bone inspired structure which possesses high strength and high toughness. Last but not least, we clarified the toughness and damage mechanism, thereby providing the design direction of the biomimetic material.
Liquidambar formosana has maple-like leaves and burr-like infructescences. The buckyball-like framework inside is composed of large holes (cells), which supports the whole structure under compression. In this study, five models were proposed to test the strength based on the inspiration of cellular structures of Liquidambar formosana. The Fibonacci composite materials were designed and exhibited six to twelve-fold improvement in toughness.

Reference ( 40 ) 〈TOP〉

[1] Francois Barthelat, Jee E. Rim, Horacio D. Espinosa (2008) “A Review on the Structure and Mechanical Properties of Mollusk Shells – Perspectives on Synthetic Biomimetic Materials,” Barthelat et al. in Applied Scanning Probe Methods XIII. Springer, 19, 1059-1100.
[2] Meyers, M. A. &Chen, P.-Y. (2014). Biological materials science : biological materials, bioinspired materials, and biomaterials.
[3] Lange-Merrill, C. (1982). “Biomimicry of the Dooxygen Active Site in the Cooper Proteins Hemocyanin and Cytocrhrome Oxidase,” Doctoral Thesis, 1–204.
[4] Benyus, J. M. (2002). Biomimicry : innovation inspired by nature.
[5] Zhao, N. (2014). “Bioinspired materials: From low to high dimensional structure, ” Adv. Mater, 26, 6994–7017.

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