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Vol. 37 (1996) No. 3 December n. 122


A new three nodes shell element with transverse shear

< Table of Contents for Vol. 37 (1996) No. 3 December n. 122
  • Journal Name: Journal of the International Association for Shell and Spatial Structures (J. IASS)
  • ISSN: (Electronic Version) 1996-9015
  • ISSN: (Print Version) 1028-365X
  • Issue: Vol. 37 (1996) No. 3 December n. 122
  • Title: A new three nodes shell element with transverse shear
  • Author(s): Guenfoud Mohamed
  • Keywords: Analysis, shells,
Abstract
This paper proposes a new three node curved shell element. The approach used in the development of the new element is based on the Marguerre shallow shell theory which incorporates the effects of the initial curvature (the out-of plane displacement) of the shell but avoids locking and kinematic modes; creates by the coupling between the membrane and the bending deformations. The decomposition mode technique is used to alleviate the membrane locking problem and also to improve the membrane bending performance. In the formulation of the new element, the Mindlin-Reissner kinematic hypothesis is adopted to including the transverse shear effect. The Discrete Strain Theory (DST) is used to avoid the shear locking problem see when the shell Marguerre theory (DSTM). It is the resulting element of the superimposed of the Constant Strain Triangle (CST) element on the Discrete Shear Triangle (DST) element. This formulation enables us to obtain a shell element, which does not produce spurious singular modes, avoids locking phenomena, and excels in calculation efficiency. Several examples in this paper indicate that, despite its simplicity, the achieved accuracy and convergence are satisfactory.

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