A hybrid stress nine-node degenerated shell element for geometric nonlinear analysis |
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| Authors: | K Y Sze S-J Zheng |
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| Affiliation: | (1) Department of Mechanical Engineering, The University of Hong Kong Pokfulam Road, Hong Kong SAR, P.R. China, HK;(2) Research Institute of Smart Materials & Structures, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, P.R. China, CN |
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| Abstract: | A stabilized nine-node degenerated shell element, previously derived for linear analysis by the admissible matrix formulation,
is extended to geometrically nonlinear analysis. The assumed stress modes pertinent to stabilization matrix are contravariant
in nature and their energy products with the displacement-derived covariant strain can be programmed without resorting to
numerical integration and the Gram-Schmidt orthogonalization. Numerical tests show that its accuracy is virtually identical
to the uniformly reduced integration element. |
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