Prescribed pattern transformation in swelling gel tubes by elastic instability

Details Prescribed pattern transformation in swelling gel tubes by elastic instability Prescribed pattern transformation in swelling gel tubes by elastic instability

2012-04-12

arxiv.org/abs/1204.3087v1

Physics

Condensed Matter

Soft Condensed Matter

32 pages, 7 figures

Scientific paper

We present a study on swelling-induced circumferential buckling of tubular shaped gels. Inhomogeneous stress develops as gel swells under mechanical constraints, which gives rise to spontaneous buckling instability without external force. Full control over the post-buckling pattern is experimentally demonstrated. A simple analytical model is developed using elastic energy to predict stability and post-buckling patterns upon swelling. Analysis reveals that height to diameter ratio is the most critical design parameter to determine buckling pattern, which agrees well with experimental and numerical results.

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