Document Type
Article
Version Deposited
Published Version
Publication Date
10-11-2023
Publication Title
Engineering Research Express
DOI
10.1088/2631-8695/acfd81
Abstract
Zero Poisson’s ratio structures are a new class of mechanical metamaterials wherein the absence of lateral deformations allows the structure to adapt and conform their geometries to desired shapes with minimal interventions. These structures have gained attention in large deformation applications where shape control is a key performance attribute, with examples including but not limited to shape morphing, soft robotics, and flexible electronics. The present study introduces an experimentally driven approach that leads to the design and development of (near) zero Poisson’s ratio structures with considerable load-bearing capacities through concurrent density and architecture gradations in hybrid honeycombs created from hexagonal and re-entrant cells. The strain-dependent Poisson’s ratios in hexagonal and re-entrant honeycombs with various cell wall thicknesses have been characterized experimentally. A mathematical approach is then proposed and utilized to create hybrid structures wherein the spatial distribution of different cell shapes and densities leads to the development of honeycombs with minimal lateral deformations under compressive strains as high as 0.7. Although not considered design criteria, the load-bearing and energy absorption capacities of the hybrid structures are shown to be comparable with those of uniform cell counterparts. Finally, the new hybrid structures indicate lesser degrees of instability (in the form of cell buckling and collapse) due to the self-constraining effects imposed internally by the adjacent cell rows in the structures.
Recommended Citation
Uddin, Kazi Zahir; Anni, Ibnaj A.; Youssef, George; and Koohbor, Behrad, "Modulating poisson's ratio in flexible honeycombs by density and architecture gradations" (2023). Henry M. Rowan College of Engineering Faculty Scholarship. 322.
https://rdw.rowan.edu/engineering_facpub/322
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Comments
This article was published with an Open License via one of Rowan University's Read and Publish agreements.