Imperial College London
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ProfessorBassamIzzuddin

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Computational Structural Mechanics
 
 
 
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Contact

 

+44 (0)20 7594 5985b.izzuddin Website

 
 
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Assistant

 

Ms Ruth Bello +44 (0)20 7594 6040

 
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Location

 

330Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Izzuddin:2020:10.1016/j.compstruc.2017.08.010,
author = {Izzuddin, BA and Liang, Y},
doi = {10.1016/j.compstruc.2017.08.010},
journal = {Computers and Structures},
title = {A hierarchic optimisation approach towards locking-free shell finite elements},
url = {http://dx.doi.org/10.1016/j.compstruc.2017.08.010},
volume = {232},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - A hierarchic optimisation approach is presented for relieving inaccuracies in conforming shell elements arising from locking phenomena. This approach introduces two sets of strain modes: (i) objective strain modes, defined in the physical coordinate system, and (ii) corrective strain modes, representing conforming strains enhanced with hierarchic strain modes. This leads to two alternative families of element, objective and corrective, both arising from minimising the difference between objective and corrective strains. Importantly, the proposed approach not only alleviates shear and membrane locking, but it also addresses locking arising from element distortion. The application of the proposed optimisation approach is demonstrated for a 9-noded quadrilateral Lagrangian shell element, where the membrane, bending and transverse shear strains are separately optimised, all within a local co-rotational framework that extends the element application to geometric nonlinear analysis. Several numerical examples, including cases with geometric and material nonlinearity, are finally presented to illustrate the effectiveness of the optimised 9-noded shell element in relieving the various sources of locking.
AU  - Izzuddin,BA
AU  - Liang,Y
DO  - 10.1016/j.compstruc.2017.08.010
PY  - 2020///
SN  - 0045-7949
TI  - A hierarchic optimisation approach towards locking-free shell finite elements
T2  - Computers and Structures
UR  - http://dx.doi.org/10.1016/j.compstruc.2017.08.010
UR  - https://www.sciencedirect.com/science/article/pii/S0045794917305151?via%3Dihub
UR  - http://hdl.handle.net/10044/1/52623
VL  - 232
ER  -
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