Sequential metamaterials with alternating Poisson’s ratios
Name
s41467-022-28696-9.pdf
Size
2.25 MB
Format
Adobe PDF
Checksum (MD5)
3073d6ec07da478173dde75c9d0b5657
Author(s)
Farzaneh, Amin
Pawar, Nikhil
Portela, Carlos M.
Hopkins, Jonathan B.
Date Issued
February 24, 2022
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Citation
Farzaneh, A., Pawar, N., Portela, C.M. et al. Sequential metamaterials with alternating Poisson’s ratios. Nat Commun 13, 1041 (2022).
Version
Final published version
Abstract
Mechanical metamaterials have been designed to achieve custom Poisson’s ratios via the deformation of their microarchitecture. These designs, however, have yet to achieve the capability of exhibiting Poisson’s ratios that alternate by design both temporally and spatially according to deformation. This capability would enable dynamic shape-morphing applications including smart materials that process mechanical information according to multiple time-ordered output signals without requiring active control or power. Herein, both periodic and graded metamaterials are introduced that leverage principles of differential stiffness and self-contact to passively achieve sequential deformations, which manifest as user-specified alternating Poisson’s ratios. An analytical approach is provided with a complementary software tool that enables the design of such materials in two- and three-dimensions. This advance in design capability is due to the fact that the tool computes sequential deformations more than an order of magnitude faster than contemporary finite-element packages. Experiments on macro- and micro-scale designs validate their predicted alternating Poisson’s ratios.
Subjects
General Physics and Astronomy
General Biochemistry, Genetics and Molecular Biology
General Chemistry
Multidisciplinary
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/s41467-022-28696-9
