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A four-node solid shell element formulation with assumed strain

✍ Scribed by Brian L. Kemp; Chahngmin Cho; Sung W. Lee

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
173 KB
Volume
43
Category
Article
ISSN
0029-5981

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✦ Synopsis

A set of four-node shell element models based on the assumed strain formulation is considered here. The formulation allows for changes in the shell thickness. As a result, the kinematics of deformation are described by purely vectorial variables, without using rotational angles. The present study investigates the use of bubble function displacements and the assumed strain ΓΏeld. Careful selection of the assumed strain terms generates an element whose order of numerical integration does not increase even when the bubble function displacements are added. Results for the four-node element without any bubble function terms show sensitivity to element distortion. Use of the bubble functions with a carefully chosen assumed strain ΓΏeld greatly improves element performance.

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