The compressive strength of crumpled matter

Andrew B. Croll (), Timothy Twohig and Theresa Elder
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Andrew B. Croll: North Dakota State University
Timothy Twohig: North Dakota State University
Theresa Elder: North Dakota State University

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract Crumpling a sheet creates a unique, stiff and lightweight structure. Use of crumples in engineering design is limited because there are not simple, physically motivated structure-property relations available for crumpled materials; one cannot trust a crumple. On the contrary, we demonstrate that an empirical model reliably predicts the reaction of a crumpled sheet to a compressive force. Experiments show that the prediction is quantitative over 50 orders of magnitude in force, for purely elastic and highly plastic polymer films. Our data does not match recent theoretical predictions based on the dominance of building-block structures (bends, folds, d-cones, and ridges). However, by directly measuring substructures, we show clearly that the bending in the stretching ridge is responsible for the strength of both elastic and plastic crumples. Our simple, predictive model may open the door to the engineering use of a vast range of materials in this state of crumpled matter.

Date: 2019
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DOI: 10.1038/s41467-019-09546-7

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