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Qihan Liu's picture

Elastocapillary Crease

Please find our new publication in Physical Review Letters on Elastocapillar Crease. This paper has been highlighted by Editors Suggestion.

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.098003

ABSTRACT

Gravity induced crease-to-wrinkle transition in soft materials

Creasing and wrinkling instability are two distinct surface instability modes characterized by localized singular folds and continuous smooth undulations, respectively. In this article, we show that the surface of a soft elastomer may develop wrinkles or creases under compression and the action of gravitational force, depending on the magnitude of gravitational force.

Wei Hong's picture

Formation of creases on the surfaces of elastomers and gels

When a block of an elastomer is bent, the compressed surface may form a crease. This paper analyzes the critical condition for creasing by comparing the elastic energy in a creased body and that in a smooth body. This difference in energy is expressed by a scaling relation. Critical conditions for creasing are determined for elastomers subject to general loads and gels swelling under constraint. The theoretical results are compared with existing experimental observations.

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