Couple Stress

Couple Stress Mixed Triangle/Quadrilateral

• Number of Nodes: 3, 4, 5, 6, 7, 8

• Number of DoFs: 3 (Translation, Translation, Rotation)

• DoF Label: U1, U2, UR3

References

1. arXiv:2207.02544

Syntax

element CSMT3 (1) (2...*) (3) [4] [5]
element CSMT6 (1) (2...*) (3) [4] [5]
element CSMQ4 (1) (2...*) (3) [4] [5]
element CSMQ5 (1) (2...*) (3) [4] [5]
element CSMQ6 (1) (2...*) (3) [4] [5]
element CSMQ7 (1) (2...*) (3) [4] [5]
element CSMQ8 (1) (2...*) (3) [4] [5]
# (1) int, unique element tag
# (2...*) int, corresponding number of node tags
# (3) int, material tag
# [4] double, thickness, default: 1.0
# [5] double, characteristic length, default: -1.0

Remarks

1. The geometry definitions of CS elements resemble those of CP elements (e.g., CP3, CP4, CP5, CP6, CP7, CP8).

2. The characteristic length [5] can be left as default value (negative) to automatically determine the value based on geometry (square root of area), or set to a positive value to manually specify the fixed length.

3. Currently, only supports Elastic2D.