Exploiting microstructural instabilities in solids and structures: from metamaterials to structural transitions

DM Kochmann, K Bertoldi - Applied …, 2017 - asmedigitalcollection.asme.org
Instabilities in solids and structures are ubiquitous across all length and time scales, and
engineering design principles have commonly aimed at preventing instability. However …

[HTML][HTML] Pattern detection in colloidal assembly: A mosaic of analysis techniques

V Lotito, T Zambelli - Advances in colloid and interface science, 2020 - Elsevier
Abstract Characterization of the morphology, identification of patterns and quantification of
order encountered in colloidal assemblies is essential for several reasons. First of all, it is …

Negative stiffness mechanical metamaterials: a review

X Tan, B Cao, X Liu, S Zhu, S Chen… - Smart Materials and …, 2024 - iopscience.iop.org
Metamaterials have thrived in recent years, with negative stiffness mechanical
metamaterials emerging as an essential branch. Extensive research in the past decade has …

Directing the deformation paths of soft metamaterials with prescribed asymmetric units

G Wu, Y Cho, IS Choi, D Ge, J Li, HN Han… - Advanced …, 2015 - Wiley Online Library
Despite these advances, challenges remain. For example, mechanical instability
accompanied with compression of the periodically porous structures often leads to sudden …

Buckling, symmetry breaking, and cavitation in periodically micro-structured hydrogel membranes

G Wu, Y **a, S Yang - Soft Matter, 2014 - pubs.rsc.org
We investigated swelling induced instabilities in porous membranes with a square array of
micron-sized circular holes prepared from a pH and temperature dual-responsive hydrogel …

An assessment of numerical techniques to find energy‐minimizing microstructures associated with nonconvex potentials

S Kumar, A Vidyasagar… - International Journal for …, 2020 - Wiley Online Library
Microstructural patterns emerge ubiquitously during phase transformations, deformation
twinning, or crystal plasticity. Challenges are the prediction of such microstructural patterns …

Active acoustic switches using two-dimensional granular crystals

Q Wu, C Cui, T Bertrand, MD Shattuck, CS O'Hern - Physical Review E, 2019 - APS
We employ numerical simulations to study active transistor-like switches made from two-
dimensional (2D) granular crystals containing two types of grains with the same size but …

The friction effect on buckling behavior of cellular structures under axial load

J Hu, Y Zhou, Z Liu - International Journal of Applied Mechanics, 2018 - World Scientific
When soft cellular structures are compressed axially beyond critical limits, elastic instabilities
induce buckling behavior. Although the nonlinear response of periodic materials with …

[HTML][HTML] Exploiting pattern transformation to tune phononic band gaps in a two-dimensional granular crystal

F Göncü, S Luding, K Bertoldi - The Journal of the Acoustical Society of …, 2012 - pubs.aip.org
The band structure of a two-dimensional granular crystal composed of silicone rubber and
polytetrafluoroethylene (PTFE) cylinders is investigated numerically. This system was …

Mechanics of granular materials: constitutive behavior and pattern transformation

F Göncü - 2012 - research.utwente.nl
From pharmaceutical to mining or travelling desert dunes to earthquakes, granular materials
are at the heart of many industries and natural phenomena. Improving the efficiency of the …