Bifurcation analysis of unbending and eversion of a bilayer

This study analyzes the finite deformation and the bifurcation behavior associated with the opening (i.e., unbending and eversion) of a bilayered cylinder, with layers made of hyperelastic and incompressible materials. The solution to the finite deformation problem reveals interesting stress states,...

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Bibliographic Details
Published inInternational journal of solids and structures Vol. 230-231; p. 111156
Main Authors Sinha, Mayank, Izadi, Alborz, Anthony, Rebecca, Roccabianca, Sara
Format Journal Article
LanguageEnglish
Published New York Elsevier Ltd 01.11.2021
Elsevier BV
Subjects
Axes (reference lines)
Bifurcations
Bilayer
Cylinders
Deformation
Eversion
Instability
Nonlinear elasticity
Unbending
Instability
Unbending
Nonlinear elasticity
Eversion
Bilayer
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ISSN0020-7683
1879-2146
DOI10.1016/j.ijsolstr.2021.111156

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Summary:This study analyzes the finite deformation and the bifurcation behavior associated with the opening (i.e., unbending and eversion) of a bilayered cylinder, with layers made of hyperelastic and incompressible materials. The solution to the finite deformation problem reveals interesting stress states, including the presence of multiple neutral axes, as well as in certain cases the absence of neutral axes. Additionally, we show that the presence of a second layer can significantly impact the bifurcation behavior of the system, when compared to the homogeneous cylinder. The addition of a stiff, thin layer (i.e., coating) both at the tensile as well as at the compressive side can significantly affect when a system loses stability on applying unbending and eversion.
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ISSN:0020-7683
1879-2146
DOI:10.1016/j.ijsolstr.2021.111156