Regimes of wrinkling in pressurized elastic shells

Journal article

We consider the point indentation of a pressurized elastic shell. It has previously been shown that such a shell is subject to a wrinkling instability as the indentation depth is quasi-statically increased. Here we present detailed analysis of this wrinkling instability using a combination of analytical techniques and finite-element simulations. In particular, we study how the number of wrinkles observed at the onset of instability grows with increasing pressurization. We also study how, for fixed pressurization, the number of wrinkles changes both spatially and with increasing indentation depth beyond onset. This ‘Far from threshold’ analysis exploits the largeness of the wrinkle wavenumber that is observed at high pressurization and leads to quantitative differences with the standard ‘Near threshold’ stability analysis.

Authors: Taffetani, M; Vella, D

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Royal Society
• Journal: Philosophical Transactions A: Mathematical, Physical and Engineering Sciences
• Volume: 375
• Issue: 2093
• Article number: 20160330
• Publication date: 2017-04-03
• Acceptance date: 2016-12-20
• DOI: 10.1098/rsta.2016.0330
• EISSN: 1471-2962
• ISSN: 1364-503X
• Keywords: shallow shell theory; Far from threshold wrinkling; finite element analysis