A HYBRID STRESS QUADRILATERAL SHELL ELEMENT WITH FULL ROTATIONAL D.O.F.S

A 4-node hybrid stress quadrilateral shell element with 3 rotational d.o.f.s per node is presented. The mid-surface displacement of the element is founded on AllmanÕs rotation. The equal-rotation mode intrinsic to the rotation is suppressed by a stabilization vector. The assumed stress Þeld and the stabilization scalar is chosen such that membrane locking can be avoided. Computational e¦ciency of the element is improved by employing orthogonal stress modes and admissible matrix formulation. Popular benchmark tests are attempted and the results are found to be satisfactory