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An unsymmetric 8-node hexahedral solid-shell element with high distortion tolerance: Linear formulations

Junbin Huang, Song Cen, Zhi Li, Chen-Feng Li, Chenfeng Li Orcid Logo

International Journal for Numerical Methods in Engineering, Volume: 116, Issue: 12-13, Pages: 759 - 783

Swansea University Author: Chenfeng Li Orcid Logo

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DOI (Published version): 10.1002/nme.5945

Abstract

A locking‐free unsymmetric 8‐node solid‐shell element with high distortion tolerance is proposed for general shell analysis, which is equipped with translational degrees of freedom only. The prototype of this new model is a recent solid element US‐ATFH8 developed by combining the unsymmetric finite...

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Published in: International Journal for Numerical Methods in Engineering
ISSN: 00295981
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa44787
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Abstract: A locking‐free unsymmetric 8‐node solid‐shell element with high distortion tolerance is proposed for general shell analysis, which is equipped with translational degrees of freedom only. The prototype of this new model is a recent solid element US‐ATFH8 developed by combining the unsymmetric finite element method and the analytical solutions in three‐dimensional local oblique coordinates. By introducing proper shell assumptions and assumed natural strain modifications for transverse strains, the new solid‐shell element US‐ATFHS8 is successfully formulated. This element is able to give highly accurate predictions for shells with different geometric features and loading conditions and is quite insensitive to mesh distortions. In particular, the excellent performance of US‐ATFH8 under membrane load is well inherited, which is an outstanding advantage over other shell elements.
Keywords: analytical trial functions, finite element methods, mesh distortions, oblique coordinates, solid‐shell elements, unsymmetric finite elements
College: College of Engineering
Issue: 12-13
Start Page: 759
End Page: 783