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Multiscale Structural Design and Fracture Control of High-Performance Biomimetic Materials
Kaijin Wu1,*, Yong Ni1
1 Department of Modern Mechanics, University of Science and Technology of China, Hefei, 230026, China
* Corresponding Author: Kaijin Wu. Email:
The International Conference on Computational & Experimental Engineering and Sciences 2023, 26(3), 1-2. https://doi.org/10.32604/icces.2023.09028
Abstract
Bioinspired architectural design for composites with much higher impact-resistance and fracture-resistance
than that of individual constituent remains a major challenge for engineers and scientists. Inspired by the
survival war between the mantis shrimps and abalones, we develop multiscale mechanical methods to
design structures and control fractures in high-performance biomimetic materials. The first point is the
optimization design of impact-resistant nacre-like materials [1-4]. By a combination of simulation, additive
manufacturing, and drop tower testing we revealed that, at a critical interfacial strength or a critical
prestress, the competition between intralayer cracks and interlayer delamination, or the synergistic effect
between the prestress-enhanced tablets sliding and prestress-weakened structural integrality, result in
optimized impact resistance of nacre-like structures. Furthermore, the interfacial strength design and the
prestressing strategy were easily implemented to a designed nacre-inspired separator to enhance the
impact resistance of lithium batteries. Later, we designed a discontinuous fibrous Bouligand (DFB)
architecture [5], whose fracture-energy dissipations are insensitive to initial crack-orientations and show
optimized values at critical pitch angles. Fracture mechanics analyses demonstrate that the hybrid
toughening mechanisms of crack twisting and crack bridging mode arising from DFB architecture enable
excellent fracture-resistance with crack-orientation insensitivity. The compromise in competition of energy
dissipations between crack twisting and crack bridging is identified as the origin of maximum fracture
energy at a critical pitch angle. We further illustrate that the optimized fracture energy can be achieved by
tuning fracture energy of crack bridging, pitch angles, fiber lengths and twist angles distribution in DFB
composites. Our findings shed light on how nature have evolved materials to exceptional impact resistance
and fracture toughness, and provide the generic design strategies for bioinspired formidable impactresistant and fracture-resistant materials.
Keywords
Cite This Article
APA Style
Wu, K., Ni, Y. (2023). Multiscale structural design and fracture control of high-performance biomimetic materials. The International Conference on Computational & Experimental Engineering and Sciences, 26(3), 1-2. https://doi.org/10.32604/icces.2023.09028
Vancouver Style
Wu K, Ni Y. Multiscale structural design and fracture control of high-performance biomimetic materials. Int Conf Comput Exp Eng Sciences . 2023;26(3):1-2 https://doi.org/10.32604/icces.2023.09028
IEEE Style
K. Wu and Y. Ni, "Multiscale Structural Design and Fracture Control of High-Performance Biomimetic Materials," Int. Conf. Comput. Exp. Eng. Sciences , vol. 26, no. 3, pp. 1-2. 2023. https://doi.org/10.32604/icces.2023.09028