Abstract
Biomimetic and Bioinspired designs have been investigated due to the advances in modeling, mechanics and experimental characterization of structural features of living organisms. To accomplish bioinspiration for fields such as robotics, adhesives and smart materials, it is required to comprehend how Nature accomplished enhanced mechanical behavior. Among the plethora of complex organisms spanning at different lengthscales, the deep sea sponge Euplectella Aspergillum has been of particular interest due to its lattice structure that can be the framework to design mechanical metamaterials. However, despite its intriguing morphology, constraints in the fabrication and modeling of scalable and nonuniform materials has hindered the study of its mechanical performance and how to harness it. Moreover, a comprehensive FEA model that encompasses the whole spectrum of its constitutive and structural performance has not been reported. In this study, it is aimed to characterize and model the mechanical behavior of this sponge from a structural standpoint. Utilizing various experimental techniques, an FEA mechanical model is developed to study the nonlinear buckling analysis of the sponge's lattice structure and its resilience to failure. Finally, through topology optimization and sensitivity analysis, a new mechanical metamaterial is proposed. Our results elucidate how mechanical characterization and FEA modeling can be employed for a deeper understanding of Nature's tailored hierarchy and the design of metamaterials.
| Original language | English |
|---|---|
| Article number | 102013 |
| Journal | Extreme Mechanics Letters |
| Volume | 61 |
| DOIs | |
| Publication status | Published - Jun 2023 |
Bibliographical note
Publisher Copyright:© 2023 Elsevier Ltd
Funding
This research was partially supported by the National Science Foundation (NSF), USA under the Future Manufacturing Seed Grant Program, Grant No. 2134534 . The authors thank Professor P. Hosemann, Department of Nuclear Engineering, University of California, Berkeley, for the availability of his indentation apparatus. The authors thank John L. Grimsich, Manager, Thin Section, SEM, XRD Labs, Department of Earth and Planetary Sciences University of California, Berkeley for assisting in the training of the XRD. The authors thank Dr. F. Allen, Department of Materials Science and Engineering (UCB) for training to use the helium ion microscope. The nanoindentation, SEM, EDS and HIM experiments were conducted at the California Institute of Quantitative Bioscience (QB3 Lab). The authors also thank Yoonsoo Rho, Laser Thermal Lab, for assisting in the AFM measurements. This research was partially supported by the National Science Foundation (NSF), USA under the Future Manufacturing Seed Grant Program, Grant No. 2134534. The authors thank Professor P. Hosemann, Department of Nuclear Engineering, University of California, Berkeley, for the availability of his indentation apparatus. The authors thank John L. Grimsich, Manager, Thin Section, SEM, XRD Labs, Department of Earth and Planetary Sciences University of California, Berkeley for assisting in the training of the XRD. The authors thank Dr. F. Allen, Department of Materials Science and Engineering (UCB) for training to use the helium ion microscope. The nanoindentation, SEM, EDS and HIM experiments were conducted at the California Institute of Quantitative Bioscience (QB3 Lab). The authors also thank Yoonsoo Rho, Laser Thermal Lab, for assisting in the AFM measurements.
| Funders | Funder number |
|---|---|
| Department of Earth and Planetary Sciences University of California, Berkeley | |
| Department of Materials Science and Engineering | |
| National Science Foundation | 2134534 |
| University of California Berkeley | |
| School of Public Health, University of California Berkeley |
Keywords
- Atomic force microscopy
- Bioinspired design
- FEA modeling
- Hierarchical mechanical behavior
- In situ SEM microindentation