Wrinkling of Pressurized Elastic Shells

Dominic Vella, Amin Ajdari, Ashkan Vaziri, Arezki Boudaoud

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

We study the formation of localized structures formed by the point loading of an internally pressurized elastic shell. While unpressurized shells (such as a ping-pong ball) buckle into polygonal structures, we show that pressurized shells are subject to a wrinkling instability. We study wrinkling in depth, presenting scaling laws for the critical indentation at which wrinkling occurs and the number of wrinkles formed in terms of the internal pressurization and material properties of the shell. These results are validated by numerical simulations. We show that the evolution of the wrinkle length with increasing indentation can be understood for highly pressurized shells from membrane theory. These results suggest that the position and number of wrinkles may be used in combination to give simple methods for the estimation of the mechanical properties of highly pressurized shells. © 2011 American Physical Society.
Original languageEnglish (US)
JournalPhysical Review Letters
Volume107
Issue number17
DOIs
StatePublished - Oct 20 2011
Externally publishedYes

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