On a consistent finite-strain shell theory based on 3-D nonlinear elasticity

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

6 Scopus Citations
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Detail(s)

Original languageEnglish
Pages (from-to)137-149
Journal / PublicationInternational Journal of Solids and Structures
Volume97_98
Online published28 Jul 2016
Publication statusPublished - 15 Oct 2016

Abstract

This paper presents a general finite-strain shell theory, which is consistent with the principle of stationary three-dimensional (3-D) potential energy. Based on 3-D nonlinear elasticity and by a series expansion about the bottom surface, we deduce a vector shell equation with three unknowns, which preserves the local force-balance structure. The key in developing this consistent theory lies in deriving exact recursion relations for the high-order expansion coefficients from the 3-D system. Appropriate 2-D boundary conditions and associated 2-D weak formulations are also proposed, including various practical cases on the edge. Then, to demonstrate its validity, axisymmetric deformations of spherical and circular cylindrical shells are investigated, and comparisons with the exact solutions are made. It is found that the present shell theory produces second-order correct results for the general dead-load case and internally pressurized case. The advantages of the present shell theory include consistency, high accuracy, incorporating both stretching and bending effects, no involvement of higher-order stress resultants and its applicability to general loadings.

Research Area(s)

  • Asymptotic analysis, Nonlinear elasticity, Shell theory, Soft materials