and by the polynomial space of [[psi].sub.[x.bar]]|T: Finite element Local space [P.sub.T] of [[psi].sub.[x.bar]]|T domain T [??] [F.sub.T] Triangle, Tetrahedron [P.sup.1] ([bar.T]) Rectangle, Hexahedron [Q.sup.1] ([bar.T])
Pentahedron span{1, [bar.x], [bar.y], [bar.z], [bar.xz], [bar.yz]}
Wexford," from Eavan Boland's "Outside History," and from one of his own poems in
Pentahedron, he goes on to comment:
The first is based on traditional element properties derived from assumed displacement folds and the second is based on stress elements based on assumed stress fields satisfying the necessary equations of stress equilibrium, enhanced displacement elements based on assumed displacement fields with additional fields vanishing on the element boundaries (the magnitudes of which are determined from the Principle of Minimum Total Potential Energy), and a special hexahedron element constructed from two
pentahedrons based on assumed displacement fields.