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Updated: Apr 2, 2026

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

Published on: October 25, 2017

Reversible dilatancy in entangled single-wire materials.

David Rodney^1,2, Benjamin Gadot^2,3, Oriol Riu Martinez³

¹Institut Lumière Matière, Université Lyon 1-CNRS, F-69622 Villeurbanne, France.

Nature Materials

|September 29, 2015

Summary

This summary is machine-generated.

Researchers developed a novel architected material from coiled wire that expands significantly in both tension and compression. This unique property, achieved through wire elongation and reversible steric effects, offers potential for advanced smart devices.

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Area of Science:

Materials Science
Mechanical Engineering
Physics

Background:

Designing structures with tunable dilatancy is crucial for advanced applications like smart filters and actuators.
Achieving rapid dilation in both tension and compression requires materials with an unusual Poisson ratio, varying with strain beyond conventional limits.

Purpose of the Study:

To investigate a novel architected material capable of significant and reversible dilatancy under both tensile and compressive loads.
To understand the underlying mechanisms governing this unusual mechanical behavior.

Main Methods:

Mechanical testing of a three-dimensional architected material composed of a self-entangled coiled wire.
Discrete element simulations to analyze material behavior and deformation mechanisms.

Main Results:

The coiled wire material demonstrated a large and reversible dilatancy in both tension and compression, behaving uniquely between discrete and continuum media.
The observed behavior stems from the interplay between wire elongation and reversible steric rearrangements.

Conclusions:

A simple coiled wire architected material exhibits extraordinary dilatancy, offering a new paradigm for designing responsive structures.
The hysteretically reversible nature of the rearrangements in elastic fibers is key to the material's performance.