Buckling morphology of an elastic ring confined in an annular channel

Pengfei YANG, Fei DANG, Xiangbiao LIAO, Xi CHEN

Research output: Journal PublicationsJournal Article (refereed)peer-review

6 Citations (Scopus)


This paper studies the buckling morphology transition of an elastic ring confined in an annular channel. Under uniform axial strain, the ring would first form one inward blister and then transit to an "S" shape, but does not induce more blisters due to an energy barrier caused by the annular shape of the channel. In order to overcome the energy barrier, external perturbation is employed and a stable morphology with multiple blisters may be obtained. A theoretical framework is then established to calculate the bifurcation points of the shape transition, which agrees well with finite-element (FEM) simulation results. The diagrams of the stable buckling morphologies with respect to the geometrics of the elastic rings are presented, which may provide useful insights for practical applications, for example, the design of a peristaltic pump. © The Royal Society of Chemistry 2019.
Original languageEnglish
Pages (from-to)5443-5448
Number of pages5
JournalSoft Matter
Issue number27
Publication statusPublished - 2019
Externally publishedYes

Bibliographical note

The work is supported by Earth Engineering Center and Center for Advanced Materials for Energy and Environment at Columbia University. X. C. acknowledges support from the National Natural Science Foundation of China (11572238 and 11872302), Key R & D Program of Shaanxi (2018ZDXM-GY-131). P. Y. thanks the China Scholarship Council for financial support.


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