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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 54
Edited by: B.H.V. Topping
Paper III.2

Error Estimation of Degenerated Shell Elements

S.H. Lo and C.K. Lee

Department of Civil and Structural Engineering, The University of Hong Kong, Hong Kong

Full Bibliographic Reference for this paper
S.H. Lo, C.K. Lee, "Error Estimation of Degenerated Shell Elements", in B.H.V. Topping, (Editor), "Advances in Finite Element Procedures and Techniques", Civil-Comp Press, Edinburgh, UK, pp 95-99, 1998. doi:10.4203/ccp.54.3.2
A posteriori error estimator suitable to be used in an adaptive refinement procedure for degenerated shell elements is suggested. The error estimator is based on the Zienkiewicz and Zhu (Z2) approach and a recovered stress field is generated for error estimation. The stress recovery procedure used is based on the patch convective co-ordinate system concept for the construction of a continuous smoothed stress field over the problem domain. The recovery procedure developed is easy to implement in which stresses are defined and computed in terms of local patches. Furthermore, in case that the shell is degenerated to a plate with zero curvature, the procedure will be equivalent to the superconvergent patch recovery technique for thick plate problems and the recovered stress will be superconvergent in such a case.

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