5.5 THREE-DIMENSIONAL ELEMENTS
Generally, three-dimensional elements maintain C0 continuity. Thus, continuity of field variable along faces of an element is the basic requirement. Also, it needs to be ensured that nodes on element interfaces uniquely define variation of function on interfaces. As compared to the basic two-dimensional triangle and quadrilateral elements, the analogous elements in three-dimensions are tetrahedral and hexahedral. In this section, characteristics of basic three-dimensional elements such as tetrahedral and prism elements are discussed.
Figure 5.35 Tetrahedral element
5.5.1 Tetrahedral Elements
Four-nodded tetrahedral ...
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