A four-node degenerated shell element with drilling degrees of freedom

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A new four-node degenerated shell element with drilling degrees of freedom (DOF) is proposed. Allman-type displacement approximation is incorporated into the formulation of degenerated shell elements. The approximation improves in-plane performance and eliminates singularities of system matrices resulted from DOF deficiency. Transverse shear locking is circumvented by introducing assumed covariant shear strains. Two kinds of penalty energy are considered in the formulation for the purpose of suppressing spurious modes and representing true drilling rotations. The proposed element can be applied to almost all kinds of shell problems including composite laminated shell structures and folded shell structures. Numerical examples show that the element is of good accuracy and of reasonably fast convergence rate.
Publisher
TECHNO-PRESS
Issue Date
1998-12
Language
English
Article Type
Article
Keywords

ROTATIONAL DEGREES; SOLID ELEMENTS; MEMBRANE; INTERPOLATION

Citation

STRUCTURAL ENGINEERING AND MECHANICS, v.6, no.8, pp.921 - 937

ISSN
1225-4568
URI
http://hdl.handle.net/10203/69001
Appears in Collection
ME-Journal Papers(저널논문)
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