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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 24
Edited by: B.H.V. Topping and M. Papadrakakis
Paper II.2

An Elasto-Plastic Formulation for Thin Walled Structures

B.A. Izzuddin and D. Lloyd Smith

Civil Engineering Department, Imperial College, London, United Kingdom

Full Bibliographic Reference for this paper
B.A. Izzuddin, D. Lloyd Smith, "An Elasto-Plastic Formulation for Thin Walled Structures", in B.H.V. Topping, M. Papadrakakis, (Editors), "Advances in Non-Linear Finite Element Methods", Civil-Comp Press, Edinburgh, UK, pp 23-34, 1994. doi:10.4203/ccp.24.2.2
This paper describes a new formulation for the elasto-plastic large displacement analysis of thin-walled members and frames. The proposed formulation is one-dimensional but facilitates the detailed modelling of any open cross-section, including the effects of the spread of plasticity and stress/strain reversals. This is achieved through the use of monitoring points over the cross-section where direct material strains are evaluated and the corresponding stresses are established according to any stress-strain relationship. Examples using ADAPTIC demonstrate the accuracy of the proposed formulation and its applicability to the study of the inelastic response of thin-walled structures subject to lateral torsional instability.

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