Directing the deformation paths of soft metamaterials with prescribed asymmetric units

Gaoxiang Wu; Yigil Cho; In-Suk Choi; Dengteng Ge; Ju Li; Heung Nam Han; Tom Lubensky; Shu Yang

doi:10.1002/adma.201500716

Directing the deformation paths of soft metamaterials with prescribed asymmetric units

Adv Mater. 2015 May 6;27(17):2747-52. doi: 10.1002/adma.201500716. Epub 2015 Mar 23.

Authors

Gaoxiang Wu¹, Yigil Cho, In-Suk Choi, Dengteng Ge, Ju Li, Heung Nam Han, Tom Lubensky, Shu Yang

Affiliation

¹ Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, PA, 19104, USA.

PMID: 25808041
DOI: 10.1002/adma.201500716

Abstract

By prescribing asymmetric ligaments with different arrangements in elastomeric porous membranes of pre-twisted kagome lattices, the buckling instability is avoided, allowing for smooth and homogenous structural reconfiguration in a deterministic fashion. The stress-strain behaviors and negative Poisson's ratios can be tuned by the pre-twisting angles.

Keywords: buckling instability; foldable structures; pattern transformation; reconfigurable structures.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Elasticity
Models, Molecular*
Porosity
Stress, Mechanical