Pattern Transitions in a Soft Cylindrical Shell

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Original languageEnglish
Article number215503
Journal / PublicationPhysical Review Letters
Volume120
Issue number21
Publication statusPublished - 25 May 2018

Abstract

Instability patterns of rolling up a sleeve appear more intricate than the ones of walking over a rug on floor, both characterized as systems of uniaxially compressed soft film on stiff substrate. This can be explained by curvature effects. To investigate pattern transitions on a curved surface, we study a soft shell sliding on a rigid cylinder by experiments, computations and theoretical analyses. We reveal a novel postbuckling phenomenon involving multiple successive bifurcations: smooth-wrinkle-ridge-sagging transitions. The shell initially buckles into periodic axisymmetric wrinkles at the threshold and then a wrinkle-to-ridge transition occurs upon further axial compression. When the load increases to the third bifurcation, the amplitude of the ridge reaches its limit and the symmetry is broken with the ridge sagging into a recumbent fold. It is identified that hysteresis loops and the Maxwell equal-energy conditions are associated with the coexistence of wrinkle-ridge or ridge-sagging patterns. Such a bifurcation scenario is inherently general and independent of material constitutive models.

Citation Format(s)

Pattern Transitions in a Soft Cylindrical Shell. / Yang, Yifan; Dai, Hui-Hui; Xu, Fan et al.
In: Physical Review Letters, Vol. 120, No. 21, 215503, 25.05.2018.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review