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Updated: Feb 15, 2026

Fabricating Metamaterials Using the Fiber Drawing Method

Fabricating Metamaterials Using the Fiber Drawing Method

Published on: October 18, 2012

Auxetic metamaterials from disordered networks.

Daniel R Reid¹, Nidhi Pashine², Justin M Wozniak³

¹Institute for Molecular Engineering, University of Chicago, Chicago, IL 60637.

Proceedings of the National Academy of Sciences of the United States of America

|February 1, 2018

Summary

Researchers engineered novel mechanical metamaterials by pruning disordered networks. This method allows precise tuning of properties like Poisson's ratio, enabling advanced applications in robotics and impact mitigation.

Keywords:

auxetic impact mitigation metamaterials optimization structure

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Area of Science:

Materials Science
Mechanical Engineering
Physics

Background:

Theoretical models suggest pruning disordered networks can yield unusual mechanical properties.
Previous experimental attempts to create auxetic materials using pruning were unsuccessful.

Purpose of the Study:

To develop a realistic model for pruned networks incorporating angle-bending forces and boundary conditions.
To devise and implement a sequential pruning strategy for engineering specific mechanical behaviors.
To experimentally validate the model and demonstrate tunable Poisson's ratio.

Main Methods:

Developed a more realistic network model with angle-bending forces and experimental boundary conditions.
Implemented a sequential pruning strategy to selectively remove bonds.
Used optimization algorithms to design networks with tailored stiffness distributions.
Fabricated physical realizations using laser cutting of 2D sheets.

Main Results:

Demonstrated precise engineering of mechanical behaviors in both linear and nonlinear regimes.
Showed that Poisson's ratio can be tuned to arbitrary values.
Validated model predictions through experimental testing of laser-cut 2D sheets.
Designed networks with enhanced auxetic behavior exceeding homogeneous counterparts.

Conclusions:

Pruned networks offer a promising platform for creating unique mechanical metamaterials.
The developed model and pruning strategy enable precise control over material properties.
Experimental validation confirms the potential for engineered auxetic materials.