Actions

Download Analytics Citations

Export to: EndNote  |  Zotero  |  Mendeley

Collections

This file is not currently in any collections.

Reduced stress propagation leads to increased mechanical failure resistance in auxetic materials [dataset] Open Access

Materials with negative Poisson ratio have the counter-intuitive property of expanding laterally when they are stretched longitudinally. They are accordingly termed auxetic, from the Greek auxesis meaning to increase. Experimental studies have demonstrated auxetic materials to have superior material properties, compared with conventional ones. These include synclastic curvature, increased acoustic absorption, increased resilience to material fatigue, and increased resistance to mechanical failure. Until now, the latter observations have remained poorly understood theoretically. With this motivation, the contributions of this work are twofold. First, we elucidate analytically the way in which stress propagates spatially across a material following a localised plastic failure event, finding a significantly reduced stress propagation in auxetic materials compared with conventional ones. In this way, a plastic failure event occurring in one part of a material has a reduced tendency to trigger knock-on plastic events in neighbouring regions. Second, via the numerical simulation of a lattice elastoplastic model, we demonstrate a key consequence of this reduced stress propagation to be an increased resistance to mechanical failure. This is seen not only via an increase in the externally measured yield strain, but also via a decreased tendency for plastic damage to percolate internally across a sample in catastrophic system-spanning clusters.

Descriptions

Resource type

Dataset

Contributors

Creator: Fielding, Suzanne M. ¹

¹ Durham University, United Kingdom

Funder

European Research Council

Research methods

Other description

Keyword

Statistical mechanics
Materials science
Soft condensed matter

Subject

Location

Language

Cited in

doi:10.48550/arXiv.2307.14914

Identifier

ark:/32150/r2x059c7391
doi:10.15128/r2x059c7391

Rights

Creative Commons Attribution 4.0 International (CC BY)

Publisher

Durham University

Date Created

File Details

Depositor

S. Fielding

Date Uploaded

1 May 2024, 14:05:23

Date Modified

2 May 2024, 10:05:39

Audit Status

Audits have not yet been run on this file.

Characterization

File format: x-gzip (GZIP Format, GZIP)

Mime type: application/x-gzip

File size: 4646456

Last modified: 2024:05:01 15:58:27+01:00

Filename: auxetic.tar.gz

Original checksum: 97cdfaa65205abf6c79b6599d658e934