Isoparametric triangle
Non-constant thickness; discontinous change in thickness possible on edges of elements.
Nodes
The element has 3 to 6 nodes. Midside nodes may be omitted.
Each node has displacements $[u,v]$ and temperature $[T].$
Faces (Edges)
The element has 3 edges, which are (considering the nonzero thickness) regarded as faces. Face normals point outward from the element.
| Face number | Node order |
|---|---|
| 1 | 1 – (4) – 2 |
| 2 | 2 – (5) – 3 |
| 3 | 3 – (6) – 1 |