FEM Modeling > Patran Element Library > Quad Element Topology
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Quad Element Topology
Patran contains six different quadrilateral element topologies: Quad4, Quad5, Quad8, Quad9, Quad12, Quad16.
General Data
Shape = Quadrilateral
Element dimensionality= 2
Number of corner nodes = 4
Number of edges = 4
Number of faces = 1
Number of face edges = 4
 
Table 15‑20
Face ID
Sense
Edge 1
Edge 2
Edge 3
Edge 4
1
1
1
2
3
4
Specific Data ‑ Quad4
Element name = Quad4
Number of nodes = 4
Order = linear
Degenerate element name = Tria3
 
Table 15‑21
Edge Number
Node 1
Node 2
1
1
2
2
2
3
3
3
4
4
4
1
 
Table 15‑22
Node Number
Xi/Eta
1
-1.0, -1.0
2
1.0, -1.0
3
1.0, 1.0
4
-1.0, 1.0
For more information, see Quad4.
Specific Data ‑ Quad5
Element name = Quad5
Number of nodes = 5
Order = linear
Degenerate element name = Tria4
 
Table 15‑23
Edge Number
Node 1
Node 2
1
1
2
2
2
3
3
3
4
4
4
1
 
Table 15‑24
Node Number
Xi/Eta
1
-1.0, -1.0
2
1.0, -1.0
3
1.0, 1.0
4
-1.0, 1.0
5
0.0, 0.0
For more information, see Quad5.
Specific Data ‑ Quad8
Element name = Quad8
Number of nodes = 8
Order = Quadratic
Degenerate element name = Tria6
Table 15‑25
Edge Number
Node 1
Node 2
Node 3
1
1
5
2
2
2
6
3
3
3
7
4
4
4
8
1
Table 15‑26
Node Number
Xi/Eta
1
-1.0, -1.0
2
1.0, -1.0
3
1.0, 1.0
4
-1.0, 1.0
5
0.0, -1.0
6
1.0, 0.0
7
0.0, 1.0
8
-1.0, 0.0
For more information, see Quad8.
Specific Data ‑ Quad9
Element name = Quad9
Number of nodes = 9
Order = Quadratic
Degenerate element name = Tria7
Table 15‑27
Edge Number
Node 1
Node 2
Node 3
1
1
5
2
2
2
6
3
3
3
7
4
4
4
8
1
 
Table 15‑28
Node Number
Xi/Eta
1
-1.0, -1.0
2
1.0, -1.0
3
1.0, 1.0
4
-1.0, 1.0
5
0.0, -1.0
6
1.0, 0.0
7
0.0, 1.0
8
-1.0, 0.0
9
0.0, 0.0
For more information, see Quad9.
Specific Data ‑ Quad12
Element name = Quad12
Number of nodes = 12
Order = Cubic
Degenerate element name = Tria9
 
Table 15‑29
Edge Number
Node 1
Node 2
Node 3
Node 4
1
1
5
6
2
2
2
7
8
3
3
3
9
10
4
4
4
11
12
1
 
Table 15‑30
Node Number
Xi/Eta
1
-1.0, -1.0
2
1.0, -1.0
3
1.0, 1.0
4
-1.0, 1.0
5
1/3, -1.0
6
1/3, -1.0
7
1.0,-1/3
8
1.0,1/3
9
1/3, 1.0
10
-1/3, 1.0
11
-1.0,1/3
12
-1.0,-1/3
For more information, see Quad12.
Specific Data ‑ Quad16
Element name = Quad16
Number of nodes = 16
Order = Cubic
Degenerate element name = Tria13
 
Table 15‑31
Edge Number
Node 1
Node 2
Node 3
Node 4
1
1
5
6
2
2
2
7
8
3
3
3
9
10
4
4
4
11
12
1
Table 15‑32
Node Number
Xi/Eta
1
-1.0, -1.0
2
1.0, -1.0
3
1.0, 1.0
4
-1.0, 1.0
5
-1/3, -1.0
6
1/3, -1.0
7
1.0,-1/3
8
1.0,1/3
9
1/3, 1.0
10
-1/3, 1.0
11
-1.0,1/3
12
-1.0,-1/3
13
-1/3,-1/3
14
1/3, -1/3
15
1/3, 1/3
16
-1/3, 1/3
For more information, see Quad16.