Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2022 Apr 5;13:1816. doi: 10.1038/s41467-022-29484-1

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Fig. 5 — Fabricated samples and measured properties of ${\hat{N}}_{4} n_{6} (7, 7)$ and ${\hat{N}}_{6} n_{6} (7, 7)$ unit in dissimilar lock modes; a Top view illustration of ${\hat{N}}_{4} n_{6} (7, 7)$ sample showing its primitive unit cell, and tessellation base vectors and tessellation levels. Engineering stress-strain curves measured for b ${\hat{N}}_{4} n_{6} (7, 7)$ in two lock configurations $A^{2}$ and $A O$ , and for c ${\hat{N}}_{6} n_{6} (7, 7)$ in two lock configurations $A^{3}$ and $A^{2} O$ . In b and c the shaded domain describes the dispersion of the results obtained from testing three samples. d Normalized compressive Young’s modulus (triangle symbols) and normalized yield strength (circle symbols) of ${\hat{N}}_{4} n_{6} (7, 7)$ vs. relative density. Error bars represent the standard deviation of our measurements. The subset in d schematically illustrates how the compressive Young’s modulus E^* and yield strength σ^* were measured. Cyclic (compressive loading-unloading) response of e ${\hat{N}}_{4} n_{6} (7, 7)$ (after ten cycles) and f ${\hat{N}}_{6} n_{6} (7, 7)$ (after four cycles) in their most compact lock modes $A^{2}$ and $A^{3}$ , respectively, showing the cyclic response stabilizes nearly after four cycles. In these experiments, the unloading is performed at 75% of the compressive strength of the initial cycle of each sample.