Geometrically Incompatible Bilinear Shell Elements and Classical Shell Models.

摘要

We study the shell models arising in the numerical modeling of shells by geometrically incompatible bilinear finite elements. The numerical model of a cylindrical shell obtained by using flat shell elements is given an equivalent formulation based on a classical shell model. We use the connection between the models to explain how a parametric error amplification difficulty or locking is avoided by some elements.