C3D20

Second Order Cube/Brick

• Number of Nodes: 20
• Number of DoFs: 3 (All Translation)
• DoF Label: U1, U2, U3
• Supports Body Force
• Constant Consistent Mass Matrix With Same Order Integration

Syntax

element C3D20 (1) (2...21) (22) [23] [24]
# (1) int, unique element tag
# (2...21) int, twenty corner nodes with conventional order
# (22) int, material tag
# [23] bool string, reduced integration scheme switch, default: true
# [24] bool string, nonlinear geometry switch, default: false

Remarks

1. The nonlinearity is implemented by using total Lagrangian (TL) formulation, turn on the switch to use it.
2. The reduced integration uses 2^nd order Gauss scheme.
3. The full integration uses 3^rd order Irons scheme.

Sample