Abstract
A new continuum based thick shell model is presented for modeling orthotropic laminated shell structures undergoing large elastic deformations. An equivalent single-layer model involving seven nodal degrees of freedom is used. In that layered model, there are no restrictions on the number of layers, their thickness and their stacking sequence. The shell model accounts explicitly for the thickness change in the shell, as well as the normal stress and strain states through its thickness. Shear locking is avoided using an assumed natural strain formulation, while thickness locking is avoided using modified displacement interpolation functions. The performance of the layered shell element is tested using several linear and non-linear composite plate and shell problems involving anisotropic, angle and cross-ply laminates, cylindrical and spherical shells.
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El-Abbasi, N., Meguid, S.A. A Continuum Based Thick Shell Element for Large Deformation Analysis of Layered Composites. Int J Mech Mater Des 2, 99–115 (2005). https://doi.org/10.1007/s10999-005-4445-4
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DOI: https://doi.org/10.1007/s10999-005-4445-4